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杭加湖地区自一九五六年提倡改制后,双季稻面积有很大增加。但連作晚稻(以下簡称連晚)的产量仍处于不稳定的状态。其主要原因是:(一)施肥水平低,从早稻和单季晚稻施肥后,留給連晚的肥料不多了,形成部分田严重缺肥;(二)生育期短,从七月二十一日开始插秧到十月底或十一月初成熟,最长的本田生育期也只有100天,对晚粳来讲,比作单季稻縮短35天左右,因此营养生长不良,植株矮小,越是迟栽的产量越低,到立秋以后移栽的常沒有收成。而且本区位于連作稻的北缘,其中还要受到揚花期低溫
After the Hangang Lake region advocated restructuring in 1956, the area of double-crop rice has greatly increased. But even for late rice (hereinafter referred to as late) production is still in an unstable state. The main reasons for this are as follows: (i) low levels of fertilization, resulting in a small number of fertilizers even after fertilization from early rice and single-season late rice, resulting in a serious lack of fertility in some fields; (ii) short growth period, from July 20 Transplanting seedlings from the first day of maturity to the end of October or early November, the longest Honda growth period of only 100 days, compared with the late rice is shortened than single-crop rice for about 35 days, so malnutrition, short plants, the more late planted The lower the yield, to the autumn after transplanting often no crop. And the area is located in the northern edge of continuous cropping rice, of which the blooming period also affected by low temperature