CAJ | 학술논문

以东农425、东农427和松粳6号为材料, 设7个钾素水平, 即K2 O施用量为: K0 ( 0 kg · hm-2 )、 K1 (25 kg·hm-2)、 K2 (50 kg·hm-2)、 K3 (75 kg·hm-2)、 K4 (100 kg·hm-2)、 K5 (125 kg·hm-2) 和 K6 (150 kg·hm-2 ). 研究了钾肥用量对寒地粳稻不同穗位籽粒灌浆过程和产量的影响. 结果表明: 适宜的钾肥施用量为75~100 kg·hm-2. 品种间灌浆过程的变化规律相似, 穗位间灌浆过程差异较大. 各穗位的千粒重、结实率与最终的产量相关性显著. 钾肥施用量可以调节不同穗位籽粒的灌浆强度, 在最适钾肥施用量下, 上部穗位籽粒起始生长势 (R0) 与中、下部穗位籽粒R0的平均差异缩小到0. 089, 而平均生长速率 (GRmean) 在K6处理下与中、下部穗位籽粒GRmean的平均差异缩小到0. 016 g· d-1; 适宜的钾肥施用量也明显提高了不同穗位籽粒中、后期灌浆的产量贡献率, 最终使不同穗位的产量均衡, 并达到高产.
이동농425、 동농427화송갱6호위재료, 설7개갑소수평, 즉K2 O시용량위: K0 ( 0 kg · hm-2 )、 K1 (25 kg·hm-2)、 K2 (50 kg·hm-2)、 K3 (75 kg·hm-2)、 K4 (100 kg·hm-2)、 K5 (125 kg·hm-2) 화 K6 (150 kg·hm-2 ). 연구료갑비용량대한지갱도불동수위자립관장과정화산량적영향. 결과표명: 괄의적갑비시용량위75~100 kg·hm-2. 품충간관장과정적변화규률상사, 수위간관장과정차이교대. 각수위적천립중、 결실솔여최종적산량상관성현저. 갑비시용량가이조절불동수위자립적관장강도, 재최괄갑비시용량하, 상부수위자립기시생장세 (R0) 여중、 하부수위자립R0적평균차이축소도0. 089, 이평균생장속솔 (GRmean) 재K6처리하여중、 하부수위자립GRmean적평균차이축소도0. 016 g· d-1; 괄의적갑비시용량야명현제고료불동수위자립중、 후기관장적산량공헌솔, 최종사불동수위적산량균형, 병체도고산.
Three japonica rice varieties, Dongnong 425, Dongnong 427 and Songjing No. 6, were studied by field experi-ments with K2O rates as K0 (0 kg·hm-2), K1 (25 kg·hm-2), K2 (50 kg·hm-2), K3 (75 kg·hm-2), K4 (100 kg·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 varie-ties and different among ear heights. Grain weight and seed setting rate was significantly correlated with final yield. Potash fer-tilizer 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 GRmean between upper and the middle and lower ear grain reduced to 0. 016 g· 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 .