Studies on the growth characters and nutrient uptake related to source and sink by cool water temperature at reproductive growth stage, 4; influence of growth characters and nutrient uptake of leaf blade, rachis branches and chaff by nitrogen, phosphate, potassium and silicate
1986
Choi, S.I. | Hwang, C.J. (Chonbuk Provincial Rural Development Administration, Iri (Korea R.))
In cold water irrigation, some growth and yield were decreased by heavy application of nitrogen but increased by heavy application of phosphate, potassium and silicate. Among growth characters, number of spikelets per panicle and grain filling ratio were affected significantly. Cold damage in number of spikelets, spikelet sterility and degeneration of spikelet and branch could be reduced by increasing application amount of phosphate, potassium and in particular silicate. Number of spikelets per branch was closely related with number of spikelets per secondary branches. Number of abortive grains and immature grains had negative correlations with yield and could be reduced by heavy application of phosphate, potassium and silicate. Heavy nitrogen application led to high total nitrogen content and restrained the uptake of phosphate, potassium and silicate
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