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油菜壮苗安全越冬是生产上一个极为重要的问题。我组于1977-1978年度设置播期、密度、品种等小型观察试验,探索壮苗越冬有关问题。一、试验地的一般管理试验地在院内,地力中下,前茬毛苕。播种期试验于8月31日,9月4日、9月9日播种。密度试验于9月1日播种。品种观察于9月2日播种。行距1尺,开沟播种时亩溜施过磷酸钙20斤。9月24日亩追尿素10斤,灌水1次。9月28日、10月
Rape strong seedling security overwintering production is an extremely important issue. In 1977-1978, our group set up small-scale observation tests such as sowing date, planting density, variety, and explored the issues related to overwintering strong seedlings. First, the general test of the test site in the hospital, in the next force, the former crop hairy. Sowing tests were conducted on August 31, September 4 and September 9. Density tests were sown on September 1. Variety observation was sown on September 2. 1 foot spacing, ditch sowing sowed calcium phosphate 20 kg. September 24 acres of urea recovery 10 pounds, irrigation 1 times. September 28, October