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Full-Text Articles in Physical Sciences and Mathematics

Recent Advances In Pasture Research And Development In Zambia With Special Reference To The Agro-Ecological Regions, Jarsolav Kulich Aug 2024

Recent Advances In Pasture Research And Development In Zambia With Special Reference To The Agro-Ecological Regions, Jarsolav Kulich

IGC Proceedings (1993-2023)

Zambia is a large country (7S2 972 km"Z) with a low population density (about 1 Olkm2), 3 distinct seasons and 3 a8f(!-ecological regions, Each region has a specific temperature and rainfall regime, The country has 2.6 million head of cattle of various breeds concentrated in regions of low (<700 mm) to moderate (8()()..1000 mm) annual rainfall with high to moderate temperatures, Calving and turn off rates are low in the traditional sector, Pasture research started 10 years ago. Work reported here was concentrated in each of the agro-ecologlcal regions. The results suggested that production from local breeds could be improved by adopting and integrating pasture farming.

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Increasing Forage Quantity And Quality Through Mixed Cropping In Kuestan, Iran, A Kashani, J Bahrani Aug 2024

Increasing Forage Quantity And Quality Through Mixed Cropping In Kuestan, Iran, A Kashani, J Bahrani

IGC Proceedings (1993-2023)

It was concluded from 3 years of trials in Iran that oats-clover and barley-clover mixtures produced more forage than their pure stands and than medic mixtures. Nitrogen topdressing increased the forage yields of mixtures. Since mixtures are more nutritious and balanced as feed for livestock, their planting is recommended for the region.

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Influence Of Phosophogypsum On Bahiagrass Production, J E. Rechcigl, I S. Alcordo Aug 2024

Influence Of Phosophogypsum On Bahiagrass Production, J E. Rechcigl, I S. Alcordo

IGC Proceedings (1993-2023)

Phosphogypsum, a byproduct of phosphoric acid production, is 85-93% gypsum and is a potential source of sulphur and calcium for crops. Phosphogypsum is presently accumulating at the rate of more than I SO million tonnes annually world wide. A field study was conducted for 2 years to evaluate the influence of phosphogypsum on bahiagrass (Paspalum notatum Flugge) production in Florida. Treatments consisted of 5 rates of phosphogypsum (0, 0.2, 0.4 and 1.0 Mg phosphogypsum/ha applied annually and 2.0 and 4.0 Mg phosphogypsum ha applied at a one time application). Treatments were replicated 4 times in a randomised complete block …

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Influence Of Selected Horizon Combinations Of A Spodosol On Bahiagrass Yield And Quality, H Ibrikci, J E. Rechicigl, E A. Hanlon Aug 2024

Influence Of Selected Horizon Combinations Of A Spodosol On Bahiagrass Yield And Quality, H Ibrikci, J E. Rechicigl, E A. Hanlon

IGC Proceedings (1993-2023)

In recent field studies, bahiagrnss (Paspalum notatum Flugge), a major forage crop in Florida, did not respond lo added Phosphorus fertiliser even though preplant Mehlich I (Ml) soil test indicated very low extractable P (<10 mg/kg). Surface (Ap), E, spodic (Bh) horizons of a Spodosol, limed spodic horizon (BhL), and commercial builders sand were packed into cylindrical plastic bags in selected combinations. The combinations were Ap-B-S, Ap-E-Bh, Ap-E-BhL, and sand. P was applied in 2 rates as O and 60 kg P/ha to selected bags. Bahiagrass sod with its stolon-root system was collected from an unfertilised bahiagrass field, then placed on the soil surface within the growth bags. The experiment was arranged in a completely randomised design with 4 replicates in a glasshouse. Total forage yield, root dry weight, root growth and distribution were determined in each bag over a period of 175 days. Total forage dry matter was increased with addition of 60 kg P/ha in all treatments. Root growth was not influenced by treatments but dry root weight was different in each treatment. Overall forage crude protein content was not influenced by treatments.

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Nutrient Cycling Via Forage Litter In Tropical Grass-Legume Pastures, R J. Thomas, M Fisher, C Lascano, I M. Rao, M Ayarza, N Asakawa Aug 2024

Nutrient Cycling Via Forage Litter In Tropical Grass-Legume Pastures, R J. Thomas, M Fisher, C Lascano, I M. Rao, M Ayarza, N Asakawa

IGC Proceedings (1993-2023)

Monthly rates of litter production were compared in pastures of Brachiaria dictyonenra either alone or in associations with Centrosema acutifolium or Stylosanthes capitata at low (I) medium ( 1.5), or high (2.0 animals/ha) stocking rates. Even though litter biomass at the start of grazing differed between treatments, after 3 months' grazing there were no differences either between grass or grass-legume pastures or between stocking rates in monthly rates of litter production. There were large differences in the quality of pasture litter however, the associations having 3- to· 4-fold greater concentrations of N, P and Ca compared with grass-only pastures …

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New Panicum Maximum Cultivars For Diverse Ecosystems In Brazil, L Jank, J C.G Costa, Y H. Savidan, C B. Do Valle Aug 2024

New Panicum Maximum Cultivars For Diverse Ecosystems In Brazil, L Jank, J C.G Costa, Y H. Savidan, C B. Do Valle

IGC Proceedings (1993-2023)

In 1982 a collection of 426 accessions of Panicum maximum (guinea grass) representative of its natural variability, was introduced co Brazil through a co-operative agreement with Prance. After 2 years of agronomic and morphological evaluation of this germplasm in small plots in Campo Grande, MS, 25 accessions were selected to be tested in diverse ecosystems throughout Brazil. The national network of evaluation was established in January 1988, over 7 states of the country: 2 in the humid tropics, 3 in the savannas, 1 towards the north-east coast and 1 in the subtropics. Agronomic variables studied were dry season and year-round …

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Agronomic Evaluation Of Brachiaria Germplasm In Brazil, C B. Do Valle, S Calixto, M C. Amexquita Aug 2024

Agronomic Evaluation Of Brachiaria Germplasm In Brazil, C B. Do Valle, S Calixto, M C. Amexquita

IGC Proceedings (1993-2023)

Increasing demands for new cultivars of grasses adapted to the acid soils of tropical savannas and resistant to spittlebugs (Homoptera:Cercopidae) led CIAT to organise collections of Brachiaria spp. germplasm in eastern Africa in the 1980s. Over 800 accessions were assembled and distributed to various countries. Bmpresa Brasileira de Pesquisa Agropeculiria (BMBRAPA) received about 300 accessions which are being evaluated with the objective of selecting superior Brachiaria cultivars to be released to farmers. This paper reports on the agronomic performance of 184 accessions belonging to 5 different species, evaluated for 2 years in small plots, in Campo Grande, MS, Brazil. Parameters …

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Climatic Variation In The Monsoonal Subtropics Of China And Its Effect On Grassland Farming, Jizhou Ren, Xianglin Li, P.N P. Matthews Aug 2024

Climatic Variation In The Monsoonal Subtropics Of China And Its Effect On Grassland Farming, Jizhou Ren, Xianglin Li, P.N P. Matthews

IGC Proceedings (1993-2023)

The subtropical regions of China, making up 28% of the total area of the country, are characterised by 3 types of ecological environment as a result of effects of the monsoon climate: Indian Ocean monsoon­dominated (dry winter-spring), Pacific Ocean monsoon-dominated (hot, dry summer), and highland transitional (moderate) types. Bach of these has specific patterns of humidity (referred to as K value) and pasture growth. The main constraints to and opportunities for grasshind farming in China's subtropics are highlighted.

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Seasonal Yield Distribution Pattern Of Dryland Pastures In Yucatan, Mexico, I R. Armendariz, J B. Castillo, M E. Bolio, L Ramirez Aug 2024

Seasonal Yield Distribution Pattern Of Dryland Pastures In Yucatan, Mexico, I R. Armendariz, J B. Castillo, M E. Bolio, L Ramirez

IGC Proceedings (1993-2023)

An experiment was conducted in order to characterise the seasonal distribution of the dry malt er (DM) yield of buff el ( Cenclmis ciliaris), guinea (Panicum maximum) and llanero (Andropogon gayanus) swards under dryland conditions in Yucaufo, Mexico. Average rainfall is 952 mm - falling mainly in June-November. Treatments consisted of a factorial arrangement of grass species, and 3 series of plots rotationally 6 weeks with 2-week intervals between cuts, all allocated to 4 blocks on a Luvisol. Plot size was 3x4 m and the sampling area was 6.9 m2, The cutting height was 20 cm. Fertilisers …

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Potential Yield And Adaptability Of Tropical Forages In Different Ecological Regions Of Burundi, P Brandelard, O Ncamihgo Aug 2024

Potential Yield And Adaptability Of Tropical Forages In Different Ecological Regions Of Burundi, P Brandelard, O Ncamihgo

IGC Proceedings (1993-2023)

The permanent grasslands based mainly on Eragrostis olivacea are (disappearing in Burundi, because of the increasing density of small . farms. As a result, the integration of forage cultivation in the traditional farming systems becomes of vital importance for the survival of livestock production. A 5-year investigation on yields, nutritive value, persistence and adaptability to soil and altitude of several indigenous and introduced tropical forage grasses and legumes in various ecological regions of Burundi led to proposals that some well-adapted species and cultivars be distributed to farmers. Some species, like Tripsacum andersonii, Pennisetum purpureum and Desmodium intortmn, are quite …

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Evaluation Of A Collection Of Paspalum Sp. Aff P. Plicatulum For The Cerrado Ecosystem, Brazil, J.F M. Vallis, E A. Pizarro, M A. Carvalho Aug 2024

Evaluation Of A Collection Of Paspalum Sp. Aff P. Plicatulum For The Cerrado Ecosystem, Brazil, J.F M. Vallis, E A. Pizarro, M A. Carvalho

IGC Proceedings (1993-2023)

The present work summarises the results of the agronomic evaluation of 42 accessions of Paspalum sp. aff. P. plicatulum, with 2 levels of fertiliser (low=pasture establishment and high=crop production) on a red-yellow latosol. Dry matter DM yield in the first 10 months from establishment ranged from 350 to 4400 kg/ha. 47 days from the start of the rainy season, estimated DMY ranged from 400 to 3700 kg/ha. DM yield accumulated during the whole wet season (October-May) ranged from 1 to 18 t/ha. The proportions of dead and green material were variable, with big differences (P<0.001) between accessions. At the end of the rainy period (122 days regrowth), the ratio ranged from 0.3:1 to 25:1 (BRA009652 and 009687 respectively). The mean Crude protein content was 10.3%:tl.21 and the mean intro DM digestibility was 49%±3.7 with a range of 16 units between accessions (40% • 56%). The germplasm tested was free of foliar diseases and insect pests, including spittlebug. Seed yield was variable, ranging from very little to 1200 kg/ha pure seed yield for the most promising accessions.

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Effect Of Nitrogen Fertilizer Applied As Urea To Dryland Tropical Grass Pastures On Presentation Yield And Chemical Composition, G K. Reason, T M. Bowdler, K F. Lowe, J Chaseling Aug 2024

Effect Of Nitrogen Fertilizer Applied As Urea To Dryland Tropical Grass Pastures On Presentation Yield And Chemical Composition, G K. Reason, T M. Bowdler, K F. Lowe, J Chaseling

IGC Proceedings (1993-2023)

Pasture yields responded to applied nitrogen (urea) at either 200, 400 or 600 kg/ha/year of N under generally adverse seasonal conditions. Dry (DM) matter production differences were measured in each year, and in all seasons except spring for the 200 v. 400 kg N comparison. Autumn DM production increased by 25% with the increase from 200 - 400 kg N, and an additional 200 kg N resulted in a further 10.4% increase in dry matter yield. Botanical composition changes were consistent with expectations that Nitrogen would favour the more valuable pasture species. The expected improvement in feed quality as a …

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Advances In Pasture Research And Education In Cuba, F Funes Aug 2024

Advances In Pasture Research And Education In Cuba, F Funes

IGC Proceedings (1993-2023)

Although some pasture research has been carried out since the beginning of the century, during the last 30 years important advances in pasture research and education have been attained in Cuba, In 1962 the first experimental s1ation specializing in pastures was created; at present there are 3 national centers and 15 research stations in different provinces of Cuba, with more than 200 scientists, 400 1echnicians and approximately 500 workers. Moreover, further research at the universities and technological schools are carried out. Every 5 years national research programs co-ordinated by the Academy of Sciences in search of solutions to the main …

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Land Use Transition In The Grazing Areas Of Narok District, Kenya, W N. Wamicha, V P. D'Costa Aug 2024

Land Use Transition In The Grazing Areas Of Narok District, Kenya, W N. Wamicha, V P. D'Costa

IGC Proceedings (1993-2023)

This work underscores the need for land use transitions in the Kilgoris and Lolgorien divisions of the Narok district, Because of the competition for grass between livestock and wildlife in addition to low technology used by the farmers, concentration of livestock in the area is very low (I SU/3 ha). Although the area is in agroclimatic zones (1-111), with high to medium potential for agricultural production, less than 40% is under cultivation. The main objective of this study was therefore to analyse the environmental and economic aspects of the potential agricultural production in the area. Animal production has 􀀼en found …

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Effects Of Mulch Types On Early Growth Of The Browse Plant Gmelina Arborea Roxb. In Nigeria, L C. Nwaigbo, O A. Opara-Nadi, F N. Madubuike Aug 2024

Effects Of Mulch Types On Early Growth Of The Browse Plant Gmelina Arborea Roxb. In Nigeria, L C. Nwaigbo, O A. Opara-Nadi, F N. Madubuike

IGC Proceedings (1993-2023)

Early growth or Gmelina arborea under 3 different mulch treatments and an unmulched control was investigated. Plants were grown in drained polythene bags measuring 36 cm flat width and 40 cm deep. The mulch treatments were plastic and 6 t/ha and 12 t/ha fresh Panicum maximum. The experiment was rain-Ced and was a completely randomised design with 5 replications. Three weeks after germination 2 seedlings were transplanted into each polythene bag. Plant height and leaf area measurements at weekly intervals started at the 7th week after transplanting (WAT). Shoot biomass and root biomass were determined at the 18th WAT. …

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Productivity And Nutritive Value Of The New Perennial Protein Fodder Crop Galega Orientalis Lam. Cv. Gale, B Radenovic Aug 2024

Productivity And Nutritive Value Of The New Perennial Protein Fodder Crop Galega Orientalis Lam. Cv. Gale, B Radenovic

IGC Proceedings (1993-2023)

Galega orienalis Lam. cv. Gale was first sown in Yugoslavia in 1991, in the north Backa region. The yields of green mass and hay, and crude protein, crude fat, ash and dry matter (DM) contents, obtained from 2 swaths in the year of sowing were much higher than those obtained from lucerne as the control crop.

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Ponded Pasture Systems For Beef Production In Seasonally Dry Zones Of Northern Australia, J H. Wildin Aug 2024

Ponded Pasture Systems For Beef Production In Seasonally Dry Zones Of Northern Australia, J H. Wildin

IGC Proceedings (1993-2023)

In northern Australia's monsoonal zone the dry season nutritional stress is a major constraint to beef production. Between May and November the quality of dry native pastures is extremely low, particularly in digestibility, nitrogen and mineral content, and cattle lose weight. To overcome this serious constraint many innovative technologies in cattle husbandry, supplementary feeding and improved pastures have been developed, Growing water-loving grasses for green forage in the dry season using wet season water in artificial ponds is a permanent forage system being adopted commercially in central Queensland and other regions of northern Australia. Para grass (Bracltiaria mutica) …

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Development And Adoption Of Sustainable Pasture Improvement Technologies In Smallholder And Plantation Farming Systems In Vanuatu, D C. Mcfarlane, B F. Mullen, T R. Evans Aug 2024

Development And Adoption Of Sustainable Pasture Improvement Technologies In Smallholder And Plantation Farming Systems In Vanuatu, D C. Mcfarlane, B F. Mullen, T R. Evans

IGC Proceedings (1993-2023)

Vanuatu is the only small Pacific island state exporting beef as well as being domestically self-sufficient. The implementation of an integrated livestock development programme including a pasture improvement project with applied research and demonstration, extension and training responsibilities has contributed to a 24.3% improvement in abattoir throughput and a 7% improvement in beef as an export commodity. Approximately 1600 smallholders (15%) and 60 plantations (30%) are actively adopt.ing proven, on-farm demonstrated technologies, promoted by government and non­government extension networks, involving under-utilised native legumes, adapted introduced legumes and grasses, zero-tilling, disc strip and new manual pasture establishment techniques and weed management …

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Improving Seedling Establishment In Panicum Colaratum L., B A. Young, C R. Tischler, P W. Voigt Aug 2024

Improving Seedling Establishment In Panicum Colaratum L., B A. Young, C R. Tischler, P W. Voigt

IGC Proceedings (1993-2023)

Kleingrass (Panicun coloratum L.) populations from 2 germplasm sources previously subjected to 3 cycles (C3) of recurrent selection for increased seedling shoot fresh weight were compared with the base (Co') populations for shoot growth, root growth, seed weight and seed starch. content, Shoot weight (fresh and dry) was significantly greater in c3: than in C0 when evaluated in the environment In which selection was: practised (growth chamber). Large significant differences in fresh and· dry weight between C0 and C3 populations were also observed in I field. experiment; with smaller, non-significant differences in a second field· experiment. Seed weight was …

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Performance Of White Clover Types In Uruguay, J A. Garcia Aug 2024

Performance Of White Clover Types In Uruguay, J A. Garcia

IGC Proceedings (1993-2023)

White clover (Trifolium repens L.) is a short-lived legume in Uruguay, usually not lasting more than 3 or 4 years. The cultivar type currently being used is medium leaved and profusely flowering. Analysis of a series of variety trials over a period of 1 S years revealed that large leaved types were the best in terms of herbage yields and vegetative persistency. Frequent moisture deficit and high summer temperatures are the most important environmental factors affecting growth of white clover in Uruguay. The good performance of large-leaved types could be due to theit deeper and tap-rooted root systems.

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A Search For Persistent Perennial Legumes For Temperate Australia, M J. Hill, C Mulcahy, G Rapp Aug 2024

A Search For Persistent Perennial Legumes For Temperate Australia, M J. Hill, C Mulcahy, G Rapp

IGC Proceedings (1993-2023)

Problems with persistence of white clover (Trifolium repens L.) in extensive pastures of the high rainfall zone in eastern Australia necessitate the use of a wider range of perennial legumes. A range of species have been evaluated in nurseries and in regional on-farm trials on the northern Tablelands of New South Wales. Caucasian clover and I.oms spp. have proven most successful so far. Caucasian clover has been more productive than white clover at 2 sites in spring 1991 and autumn 1992, Hexaploid Caucasian clover has been subjected to the first of 3 cycles of recurrent selection for seedling vigour. …

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Astred- A Stoloniferous Red Clover, R S. Smith, D J. Bishop Aug 2024

Astred- A Stoloniferous Red Clover, R S. Smith, D J. Bishop

IGC Proceedings (1993-2023)

Astred is a stoloniferous red clover (Trifolium pratense L.}, selected from parent material collected in Portugal. This clover can reproduce both by seed and vegetatively through stolons and daughter plants. II has persisted in pas:ture trials for 16 years, retaining a ground cov

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Impact Of White Clover Cultivars On Nitrogen Fixation And Livestock Production In New Zealand Hill Pasture, D F. Chapman, A D. Mackay, B P. Devantier, N Dymock Aug 2024

Impact Of White Clover Cultivars On Nitrogen Fixation And Livestock Production In New Zealand Hill Pasture, D F. Chapman, A D. Mackay, B P. Devantier, N Dymock

IGC Proceedings (1993-2023)

Growth, nitrogen fixation and animal production of pastures based on the white clover (Trifolium repens L.) cultivars Grasslands Tabora or Grasslands Huia, and of unamended pastures containing the "resident" clover ecotype, were compared In a self-contained systems experiment on moderate to steep, low-fertility hill country. Put-and­take stocking of hoggets was used to assess animal production, with stocking rate determined by a feed budget model. Tabora- and Huia­based pastures had higher white clover contents than resident pastures over the first 3 years of measurement, and Tabora-based pastures fixed 4591, more N than resident pastures over 1 full year. Benefits in …

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Significance Of Seed Size And Level Of Hard Seededness On Survival Of Medic Seeds Ingested By Sheep, F Squella, E D. Carter Aug 2024

Significance Of Seed Size And Level Of Hard Seededness On Survival Of Medic Seeds Ingested By Sheep, F Squella, E D. Carter

IGC Proceedings (1993-2023)

One experiment tested the effects of 2 seed sizes (from small and large pods) and 2 levels of hnrdseededness (low and high) on survival of Medicago truncatula Oaerln. cv. Paraggio seeds in whole pods fed to sheep. A maximum survival of 6.6% was obtained for the viable seed output/total seed input when the small pod size (small seeds) with the highest level of hard seed was fed to the sheep. Dy contrast, there was only n 1.1 % survival when the large pod size (larger seeds) with the lowest level of hard seed was fed to sheep. A second experiment …

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Development Of Tetraploid Annual Ryegrass Varieties For Short-Season Use, U Feuerstein, Chr Paul Aug 2024

Development Of Tetraploid Annual Ryegrass Varieties For Short-Season Use, U Feuerstein, Chr Paul

IGC Proceedings (1993-2023)

A new strategic concept for breeding tetraploids of Lolium has been developed and successfully implemented for the first time. Based on a set of genetically diverse diploids a high number of tetraploids were induced with colchicine. The expression of a quantitative trait in the tetraploids behaved predictably in being dependent Upon the expression of the trait in the diploid ancestor and its heritability. The practical implementation of this rule resulted in new tetraploid strains with increases ln dry matter yield of about 1S% when diploid ancestors with high dry matter contents were used for polyploidisation.

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Evaluation Of Grazing-Tolerant Alfalfa Cultivars, J H. Bouton, S R. Smith Jr, C S. Hoveland, M A. Mccann Aug 2024

Evaluation Of Grazing-Tolerant Alfalfa Cultivars, J H. Bouton, S R. Smith Jr, C S. Hoveland, M A. Mccann

IGC Proceedings (1993-2023)

Alfalfa (Medicago saliva L.) does not persist under continuous stocking with grazing animals. The creeping-rooted cultivars developed in the past were low yielding and varied in grazing persistence. The method and results of a breeding effort to develop and test high yielding, grazing-tolerant alfalfa cultivars are reported here. Replicated small plots within grazing paddocks subjected to intensive,continuous stocking with beef cattle (Bos indicus) over 2 years were used for selection and testing. This procedure was successful in producing the Alfagraze cultivar; and when used to test for grazing persistence among available cultivars, Alfagraze was consistently the most …

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Breeding White Clover For Increased Persistence And Winter Growth, C K. Lee, K.F M. Reed, P J. Cunningham, J G. Rowe Aug 2024

Breeding White Clover For Increased Persistence And Winter Growth, C K. Lee, K.F M. Reed, P J. Cunningham, J G. Rowe

IGC Proceedings (1993-2023)

A programme to breed white clover (Trifolium repens L.) for increased persistence, yield and winter growth in the Australian environment is discussed. A collection of Australian ecotypes ls being used as the population base, Two projects are discussed: selection within the population of ecotypes and hybridisation of the Australian cv. Irrigation with the winter-active cv. Tamar. Plants from the ecotype population with superior yield and stolon density were identified, Controlled pollination among these selected plants produced half-sib families and their performance in 3 contrasting environments is discussed.

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Improvement Of Reseeding In Annual Clovers, G R. Smith Aug 2024

Improvement Of Reseeding In Annual Clovers, G R. Smith

IGC Proceedings (1993-2023)

Labor ator y simulations of summer soil temper atu res were used to evaluate rose (Trifolium hirum All .), berseem (T. alexandrium L.) and subterranean (T. subterramenumL.} clovers for rate or hard seed softening. The hard seed level of subterranean clover at harvest is determined mainly by environmental factors but rate of hard seed so fte ning is under genetic control. In a 3- year study at Overton , Texas, su subterranean clover cv, Mt. Barker produced 58% hard seed at harvest which softened at the rate of 8 . 6% per month, In comparison, SK43 subterranean clover …

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Comparison Of Polycross And Topcross Progeny Testing In Alfalfa, Real Michaud, D R. Viands, B R. Christine Aug 2024

Comparison Of Polycross And Topcross Progeny Testing In Alfalfa, Real Michaud, D R. Viands, B R. Christine

IGC Proceedings (1993-2023)

Several methods of population improvement in alfalfa (Medicago saliva L.) are available, but more information is needed to enable breeders to make the best choice among them. This study was conducted to compare selection based on topcross (TX) progeny performance with selection based on polycross (PX) progeny performance. X and TX families were generated from 100 genotypes, Progenies were tested for annual green matter yield in 2 locations for 2 successive years. The PX families outyielded the TX families by about 20%. The TX had similar or broader yield range among its families than the PX. The genotypic variance …

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Effects Of Water Deficit On Osmotic Adjustment And Photosynthesis Of Miscanthus Spp. Collected From Different Rainfall Regions, J Weng Aug 2024

Effects Of Water Deficit On Osmotic Adjustment And Photosynthesis Of Miscanthus Spp. Collected From Different Rainfall Regions, J Weng

IGC Proceedings (1993-2023)

Four entries of Miscanthus spp., collected from different rainfall regions, were transplanted in pots. They were subjected to S drying cycles; each cycle lasted 6-7 days. Leaf photosynthesis (Pn) began to decline when leaf water potential (L) declined to •l.3 to -1.S MPa; the L values at SO% Pn (½Pn) were -1.6 to -2.6 MPa, The L (1hPn) values were lower in plants collected from northern Taiwan (highly frequent rainfall) than those collected from southern Taiwan (distinct wet and dry season). Further, the L (½Pn) value became lower in all the entries when drying cycle was advanced, with northern Taiwan …

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