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- W2363824728 abstract "Three japonica rice varieties,Dongnong 425,Dongnong 427 and Songjing No. 6,were studied by field experiments with K2 O rates as K0( 0 kg·hm- 2),K1( 25 kg·hm- 2),K2( 50 kg·hm- 2),K3( 75 kg·hm- 2),K4( 100kg·hm- 2),K5( 125 kg·hm- 2) and K6( 150 kg·hm- 2),to explore the effect of potassium fertilizer application rates on grain filling and yield of rice with different ear grains of japonica rice in cold region. The results showed that the appropriate amount of applied potassium fertilizer was 75 ~ 100 kg·hm- 2. Variations of filling process were similar among different varieties and different among ear heights. Grain weight and seed setting rate was significantly correlated with final yield. Potash fertilizer adjusted the intensity of the filling process at different ear height. Under the condition of optimum potash fertilizer,the average difference of initial growth potential R0 between upper and the middle and lower ear grain reduced to 0. 089. In K6,the average difference of average growth rate GRmeanbetween upper and the middle and lower ear grain reduced to 0. 016g· d- 1. The appropriate amount of potash fertilizer significantly made greater contribution to the yield of different ear height grains during mid-and late filling process,balanced the yield of different ear height grains,and then improved the yield." @default.
- W2363824728 created "2016-06-24" @default.
- W2363824728 creator A5056867855 @default.
- W2363824728 date "2015-01-01" @default.
- W2363824728 modified "2023-09-23" @default.
- W2363824728 title "Effects of potassium fertilizer on the grain filling and yield of japonica rice at different panicle positions in cold region" @default.
- W2363824728 hasPublicationYear "2015" @default.
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