钾肥施用量对五优稻4号的影响

选取五优稻4号作为试验材料,对其进行5个不同钾肥施用量处理.结果表明：钾肥施用量增加,倒佚级别和比例明显减轻,适当增加钾肥施用量能提高千粒重、结实率、穗数及产量,提高整精米率、降低垩白米率、增加透明度、降低蛋白质直链淀粉含量、增加综合评价值.钾肥施用量应控制在10～12.5 kg/667 m2,水稻的产量和品种达到最佳效果.低于10 kg/667m2,容易引起倒佚使品质下降、产量降低;高于12.5kg/667m2,不但种植成本上升,产量增加不明显,品质反而有降低趋势.

Effect of Potassium Fertilizer Amount on Wuyoudao4

Taking Wuyoudao4 as test material and 5 different potassium fertilizer amount were carried on Wuyoudao4. The re- sults showed that with the increase of the potassium fertilizer application, lodging of rice was reduced, the 1000 grain weight, seed setting rate, tillers and yield, rate of head milled rice were increased, the chalky rice rate was decreased, transparency was increased, protein amylose content was reduced, the value of comprehensive evaluation was increased. The yield and quality will be the best with application of potassium fertilizer 10- 12.5 kg/667 m2 , If the application amount was lower than 10 kg/66 m2 , its would cause the rice lodging, decrease quality and yield of rice. If the application amount was higher than 12. 5 kg/667 m2 , the costs would increase, but the quality decline down without increase of yield.