钾肥对双季超级早、晚稻产量与株型的影响

Effects of Potassium Fertilizer Application on the Yield of Super Early and Late Rice and Plant Type Characteristics

2009—2010年以6个超级早、晚稻品种为材料,采用裂区设计,研究了钾肥对超级水稻产量和株型的影响。结果表明:施用钾肥可显著提高双季超级稻产量,且对超级早稻的增产效应高于超级晚稻。施钾缩短了超级早稻倒1叶叶长和超级晚稻上三叶叶长,增加了超级早稻倒2和倒3叶叶长;增加了超级早稻上三叶叶基角、开张角和超级晚稻倒2叶叶基角,缩小了超级晚稻倒1叶、倒3叶叶基角和上三叶叶开张角;增加了双季超级早晚稻的株高、倒1节间、倒2节间和倒3节间的长度,而缩短了倒4节间的长度。

The plant type characteristics of 6 combinations of double cropping super early and late rice, with split -plot design in 2009 and 2010 ,were studied with a variety of methods. The results showed that ap- plication of potassium fertilizer significantly increased the double cropping rice grain yield, and the yield in- creasing effect on super early rice was significantly higher than that on super late rice;meanwhile, it could shorten flag leaf length of super early rice and the top three leaves of super late rice, and promoted the second and the third leaf length of super early rice ;it could promote the leaf basic and opening angle of the top three leaves of super early rice and the second leaf basic angle of super late rice, and it could lessen the flag and third leaf basic angle and the top three leaves＇ opening angle of super late rice ; it could promote the plant height,internode- length of the first, second and third nodes to ton. and lessen the follrth narlt~ In tan