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我县油菜种植面积10～12万亩,约占耕地面积的四分之一。近几年油菜直播面积逐年扩大,1986年已占种植面积的80%以上,但单产一直徘徊在70公斤左右。为了总结直播油菜增产经验,我们对本县有关区、乡进行调查分析,现将结果简介如下:低产原因首先是品种问题:我县西部及城关等乡丰产性和抗病性均较差的白菜型油菜,或甘蓝型胜利油菜老品种的面积均较大,单产低于全县平均产量。第二,
I rape cultivation area of 10 to 12 million mu, accounting for about a quarter of cultivated area. In recent years, the live rapeseed area has expanded each year, accounting for more than 80% of the acreage in 1986, but the yield has been hovering around 70 kilograms. In order to summarize the experience of direct seeding rapeseed production, we conducted an investigation and analysis of the relevant districts and townships in this county. The results are summarized as follows: The reason for the low yield is firstly breed problems: the cabbage-type with poor yield and disease resistance Rape, or Brassica napus varieties of older varieties are larger, yield lower than the county average yield. second,