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1986年,宝泉岭、北安、九三农场管理局部分农场发生了大面积油菜不孕现象。宝泉岭农场管理局延军农场四队千余亩油菜亩产不足15公斤。这不仅给家庭农场造成经济损失,而且极大地挫伤了他们种植油菜的积极性。为了搞清油菜不孕的原因,我们对延军农场1986年6～7月份的气象条件和土壤条件进行了调查分析,1986年6～7月份的气温和降雨对油菜生育无不良影响,不孕的原因是土壤中缺少锌、硼微量元素(见表1)。
In 1986, a large area of rapeseed infestation occurred at some farms in Baoquan Ridge, Bei’an and Jiu San Farm Administration. Baoquanling Farm Authority Yanjun farm four teams of more than a thousand acres of rape per mu less than 15 kg. This not only caused economic losses to family farms, but also greatly dampened their enthusiasm for growing rapeseed. In order to find out the reason of rapeseed infertility, we conducted a survey and analysis of the weather conditions and soil conditions of Yanjun Farm from June to July, 1986. The air temperature and rainfall from June to July in 1986 had no adverse effect on the growth of rape, The reason is the lack of zinc, boron trace elements (see Table 1).