摘要:
运用最优设计对杂交早稻金优2155进行密度、施N量和移栽叶龄3项栽培措施研究。建立产量与3项栽培措施的回归模型,分析3项栽培措施对产量的影响,结果表明,叶龄和施N量2项措施的一次项和二次项对产量的作用都达极显著水平。密度与叶龄存在极显著的正互作效应,施N量与叶龄存在极显著的负互作效应。综合一次项、二次项、互作项的作用,3项措施对产量的作用是叶龄施N量密度。经微机模拟筛选出高产的栽培措施是:4.3~5.2叶移栽,每公顷插19.61万~26.13万丛,施纯N量140.1~182.6 kg。据N、P、K、有机肥配施试验,增施N、P、K会不同程度增产,以N、P、K配施有利于高产。增施有机肥有利于水稻生长,会增加有效穗,但要相应减少化学N肥用量,防止N肥偏多影响产量。
Abstract:
A study was conducted to optimize the cultivation of the high-yield, early-mature hybrid rice, Jinyou 2155, based on three factors: planting density(X1),quantity of nitrogen(X2)and leaf age at transplantation(X3). The regression models for the three factors affecting the rice yield were established. The experimental results reveal that X2 and X3 exerted significant influences on the yield, and that there was a significant positive correlation between X1 and X3, as well as a significant negative correlation between X2 and X3. The overall effect on yield was found to be in the order of X3X2 X1. After a simulated screening and optimization by computer,4.3-5.2 leaves for transplanting at the density of 196 100-261 300 hills perhm2 with a nitrogen application of 140.1-182.6 kghm-2 was recommended for the cultivation. The experimental results of the combined application of N, P, K and organic fertilizers indicated that increased N, P and K could raise the yield to some extend, while the increased organic fertilization promoted the growth by increasing effective panicles on the plant. On the other hand, the chemical nitrogen fertilization ought to be limited to avoid a negative effect on yield.
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