水肥耦合条件下水稻株高及其与产量关系组成分析

黑龙江省宝清县进行水肥耦合试验,采用饱和D-最优设计,在水稻控制灌溉条件下,对氮肥、磷肥、钾肥、灌水量四因素对株高、产量的影响以及二者之间相关关系进行了研究。研究结果表明,不同生育阶段不同肥料对株高的影响不尽相同;在一定的程度上可以通过增加施肥量来增加株高和产量,但过度施肥使得株高过高会造成水稻倒伏和减产;最佳的株高和产量分别为96.82 cm和17 797.90 kg/hm2,相应的水肥用量为氮223.09 kg/hm2、钾63.74 kg/hm2、磷9.15 kg/hm2,土壤水分控制标准为饱和含水率的63.9%～83.1%。

Relations of Plant Height and Rice Yield under the Condition of Water Fertilizer Coupling

Through the experiments of water-fertilizer coupling for paddy field in Baoqing,a town of Heilongjiang Province.By the Saturation D-best Design,studied influences of four factors,nitrogen fertilizer,phosphate fertilizer,potash fertilizer and water,on the plant height and yield of rice,and the Correlation of the plant height and yield under water-controlling irrigation.The results show that different fertilizers had different influences to the pant height in different growth stages.In some extent,through increased the fertilization amount to promote the plant height and improve yield,but unexhausted manurial value made plant height too high,rice lodging and yield reduction.The best plant height and yield was 96.82 cm and 17 797.90 kg/hm2.Relevant water fertilizer is that nitrogen rate was 223.09 kg/hm2,potash rate was 63.74 kg/hm2,phosphate rate was 9.15 kg/hm2 and control standards of soil water was 63.9% to 83.1% of saturated soil water content.