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随着北京郊区耕作制度的改革,套种玉米面积逐年增加,在生产上希望套种玉米能早熟早收,便于及时腾地,不误种秋分麦,因而必须在后期田间管理上采取一些措施,做到既不影响产量,又能促进早熟,这就必须了解套种玉米籽粒的灌浆过程,以便作出正确的估价。为此,我们1974年用小八趟、
With the reform of the farming system in the suburbs of Beijing, the area of intercropping maize has been increasing year by year. It is hoped that the intercropping maize can be harvested in advance so that it can be used in time and not lost in autumn. Therefore, some measures must be taken in the latter field management It does not affect the yield, but also promote the early maturity, which must understand the intercropping of corn grain filling process in order to make the right valuation. To this end, we use a small eight times in 1974,