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- W2377762604 abstract "【Objective】Effects of reduced potassium(K)on source-sink characteristics of different early/late season rice(Oryza sativa L.)varieties with low nitrogen(N)and phosphate(P)fertilizer level were analyzed to improve precise fertilization decrese and efficient utilization of nutrients.【Method】Three K rates,conventional K(K2 O 135.0kg/hm2),reduced K by 22%(K2 O 105.3kg/hm2)and without K, were conducted in field experiment with low level of N and P fertilizers.The effects of different K treatments on source-sink characteristics of rice varieties(Yuejingsimiao 2,Guixiangzhan,Huayou 8305 andTianyou 998)were explorded.【Result】Compared with conventional K,treatment with reduced K benefitedHuayou 8305andTianyou 998in obtaining higher yield,and their yields increased by 7.44% and 19.39%,respectively.Treatment with reduced K reduced yield ofGuixiangzhan,but the decrease was not significant compared to conventional K.Treatment with reduced K improved sink capacity ofYuejingsimiao 2,but reduced available plumpness of sink and leaf source(leaf area index in late growth stage, chlorophyll content and leaf senescence index in early growth stage),and ultimately led to a 14.67%reduction of yield.【Conclusion】Under lower N and P level,aproper reduction of K with coordination of sourcesink could obtain higher yield or maintain stable yield." @default.
- W2377762604 created "2016-06-24" @default.
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- W2377762604 date "2013-01-01" @default.
- W2377762604 modified "2023-09-23" @default.
- W2377762604 title "Effects of reduced potassium fertilizer on source-sink characteristics of early/late season rice in South China" @default.
- W2377762604 hasPublicationYear "2013" @default.
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