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上海郊区后季稻单产提高不快,且年度间变幅大,不稳产,从产量构成三要素看,是与结实率和籽粒性状有关。为此,了解影响后季稻结实和籽粒性状的因素甚为必要。故以1976年资料为主,结合1973、1974年资料,进行比较分析后,提出以下看法,供参考。一、年内影响后季稻结实和籽粒性状的因素分析。上海郊区后季稻产量不高,主要与结实率低,空秕率高有密切关系。一九七六年加农485的不同齐穗期之结实率、空秕率归纳为表一,从表中得知,结实率是随齐穗期的推迟而降低,而空秕率则相反。原因是随着
The yield of post-season rice in Shanghai suburbs increased unpleasantly, and the annual variation was large and unsteady. According to the three elements of production, it was related to the seed setting rate and grain traits. For this reason, it is necessary to understand the factors that affect the grain yield and grain yield of the latter part of rice. Therefore, the main data in 1976, combined with 1973, 1974 data, after comparative analysis, put forward the following views for reference. First, the annual impact on grain yield and grain quality of later season rice. The output of the post-season rice in the suburbs of Shanghai is not high, mainly due to the low seed setting rate and the high rate of empty plutonium. The fruiting rate and empty rate of Cannon 485 in different full heading stages in 1976 were summarized in Table 1. From the table, the seed setting rate decreased with the decline of full heading stage and the empty rate was the opposite. The reason is with