在水稻生产上,我们经常看到汕优6号在抽穗期前后,出现不同程度的枯叶早衰现象.可以肯定,这将对结实率和粒重带来不良影响.为明确其影响程度,1979年特对作连晚栽培的汕优6号,用模拟方法进行了本项观察.现将结果总结如下. 一、试验方法在孕穗期前,选择长势长相基本一致的植株若干株,分别在孕穗期、齐穗期、灌浆期折叶,即在离叶尖20厘米处,横折叶片, In rice production, we often see before and after heading stage, Shanyou 6, the emergence of varying degrees of premature leaf failure phenomenon can be sure, it will adversely affect the seed setting rate and grain weight to clarify the extent of their impact, 1979 Year special pairs for late cultivation Shanyou 6, the simulation method for this observation.The results are summarized as follows.First, the test method in the booting phase, select the growing phase is basically the same number of plants, respectively, in the billet Period, heading stage, grain filling folds, that is, 20 cm away from the tip of the leaves, horizontal folds,