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上海市郊区是全国油菜著名的高产区,但产量高而不稳,丰歉年间产量相差一倍左右。例如78年上海市油菜单产304斤,而77年只有152斤,而年际之间同年内各县、社、队之间产量高低十分悬殊。上海市郊油菜生产高而不稳的主要原因及其防避、抗灾的措施: 一、改革品种结构,进行种子更新目前郊区推广的胜利青梗、勺叶青、23号,长期来没有更新。良种提纯复壮跟不上,存在着“多、乱、杂”的状况,品种(品系)多达30个以上。品种混杂退化程度十分惊人。
The suburbs of Shanghai are well-known high-yielding rapeseed areas throughout the country, but the output is high and unstable, with a difference of about twice the yield between the rich and poor years. For example, in Shanghai alone, there were 304 jins of rapeseed yield in 1978, up from only 152 jin in 1977. However, the annual output of various counties, communities and teams in the same year was very poor. The main reasons for the high and unstable production of rape in the suburbs of Shanghai and their measures to prevent and combat disasters are as follows: I. Reforming the breed structure and rejuvenating the seeds At present, the victory of the promotion of the suburb populace, spoon Yeqing, No. 23 has not been updated for a long time. There is a status of “more, chaotic and miscellaneous”, with more than 30 breeds (strains). Variety of mixed degradation is very alarming.