Sulphur(S)is essential for the quality of oilseed crops,ranking as the fourth major nutrient after nitrogen(N),phosphorus(P),and potassium(K).While crops need sulphur in slightly lower amounts than phosphorus,maintain...Sulphur(S)is essential for the quality of oilseed crops,ranking as the fourth major nutrient after nitrogen(N),phosphorus(P),and potassium(K).While crops need sulphur in slightly lower amounts than phosphorus,maintaining optimum sulphur levels is crucial for oilseed yield and quality.Factors such as sulphur dynamics,impact of deficiency,application methods,and climate change must be addressed to improve agricultural practices.In South Asian countries like India,Pakistan,and Bangladesh,oilseeds are vital to the agricultural economy,supporting food security,livelihoods,and economic growth.However,climate change,marginal land cultivation,and a shift to more profitable crops like wheat and maize have led to a decline in oilseed productivity.Sulphur is particularly important for vital plant functions,including protein synthesis,chlorophyll formation,and resistance to abiotic stress.Proper management of sulphur can significantly enhance the yield,oil content,and seed quality.Sulphur fertilization improves crop resilience to pests,diseases,and environmental stresses,resulting in healthier plants.To optimize oilseed production,best practices for sulphur management like integrated nutrient management,regular soil testing,and the strategic application of sulphur-enriched fertilizers must be adopted.Despite its significance,many South Asian soils suffer from sulphur deficiency due to inadequate replenishment and reliance on high-analysis fertilizers.By enhancing sulphur availability,oilseed producers can significantly increase crop yields,improve oil content,and promote overall plant health,contributing to the agricultural economy and food security in the region.This manuscript aims to evaluate the critical role of sulphur in enhancing the yield,oil quality,and stress resilience of oilseed crops in South Asia.展开更多
Sulphur (S) cycling and implications on S fertilizer requirement in sheep-grazed pastures receiving three levels of S fertilizer at rates of 0, 30 and 60 kg S/hm 2 in 1995 and 1996 were studied using a mass-balance a...Sulphur (S) cycling and implications on S fertilizer requirement in sheep-grazed pastures receiving three levels of S fertilizer at rates of 0, 30 and 60 kg S/hm 2 in 1995 and 1996 were studied using a mass-balance approach which accounted both for S inputs to and outputs from the soil-plant-animal system. Results indicated that S fertilizer increased by 50% of herbage S uptake and 15% or more of S bio-cycling rate in grazing system. The total S recovery of 30 and 60 kg S/hm 2 treatments from 1995 to 1996 was 74.0% and 37.6% respectively. Mineralization of organic S may be an important source of S for pasture when other S sources are low, accounted for 70% of the total S inputs without S fertilizer. The grazing sheep has an important ecological function, the feature of S cycling in grazed pastures was that 90% of herbage S ingested by grazing sheep was returned to soils as excreta. The amount of S released by sheep excreta accounted about 30% of the total released S through S bio-recycling. Loss from soil S leaching beyond the major plant rooting zone was the main S output from grazing system. However, urinary and fecal S losses, including transfer and leaching losses, also affected S budgets of grazing system. It is therefore important to investigate the recycling rate of both urinary and fecal S under field conditions. Based on the mass-balance principle, at least 10 kg S/hm 2 per year may be necessary for sustainable development of grazing system.展开更多
文摘Sulphur(S)is essential for the quality of oilseed crops,ranking as the fourth major nutrient after nitrogen(N),phosphorus(P),and potassium(K).While crops need sulphur in slightly lower amounts than phosphorus,maintaining optimum sulphur levels is crucial for oilseed yield and quality.Factors such as sulphur dynamics,impact of deficiency,application methods,and climate change must be addressed to improve agricultural practices.In South Asian countries like India,Pakistan,and Bangladesh,oilseeds are vital to the agricultural economy,supporting food security,livelihoods,and economic growth.However,climate change,marginal land cultivation,and a shift to more profitable crops like wheat and maize have led to a decline in oilseed productivity.Sulphur is particularly important for vital plant functions,including protein synthesis,chlorophyll formation,and resistance to abiotic stress.Proper management of sulphur can significantly enhance the yield,oil content,and seed quality.Sulphur fertilization improves crop resilience to pests,diseases,and environmental stresses,resulting in healthier plants.To optimize oilseed production,best practices for sulphur management like integrated nutrient management,regular soil testing,and the strategic application of sulphur-enriched fertilizers must be adopted.Despite its significance,many South Asian soils suffer from sulphur deficiency due to inadequate replenishment and reliance on high-analysis fertilizers.By enhancing sulphur availability,oilseed producers can significantly increase crop yields,improve oil content,and promote overall plant health,contributing to the agricultural economy and food security in the region.This manuscript aims to evaluate the critical role of sulphur in enhancing the yield,oil quality,and stress resilience of oilseed crops in South Asia.
文摘Sulphur (S) cycling and implications on S fertilizer requirement in sheep-grazed pastures receiving three levels of S fertilizer at rates of 0, 30 and 60 kg S/hm 2 in 1995 and 1996 were studied using a mass-balance approach which accounted both for S inputs to and outputs from the soil-plant-animal system. Results indicated that S fertilizer increased by 50% of herbage S uptake and 15% or more of S bio-cycling rate in grazing system. The total S recovery of 30 and 60 kg S/hm 2 treatments from 1995 to 1996 was 74.0% and 37.6% respectively. Mineralization of organic S may be an important source of S for pasture when other S sources are low, accounted for 70% of the total S inputs without S fertilizer. The grazing sheep has an important ecological function, the feature of S cycling in grazed pastures was that 90% of herbage S ingested by grazing sheep was returned to soils as excreta. The amount of S released by sheep excreta accounted about 30% of the total released S through S bio-recycling. Loss from soil S leaching beyond the major plant rooting zone was the main S output from grazing system. However, urinary and fecal S losses, including transfer and leaching losses, also affected S budgets of grazing system. It is therefore important to investigate the recycling rate of both urinary and fecal S under field conditions. Based on the mass-balance principle, at least 10 kg S/hm 2 per year may be necessary for sustainable development of grazing system.
