油菜产量不高不稳的因素很多,其中秧苗的素质是影响产量的主要原因之一。八二年我站在新苗大队第四生产队,按油菜绿叶数的多少分大、中、小三种苗势,进行了试验。供试品种为7401(中熟偏晚),播种期为10月5日,用种量每亩1.2斤。秧田前茬棉花,出苗10月9日。10月23日每亩施5斤尿素,11月15日亩施12担大粪,拔秧前沟灌。11月18日移栽,密度为9449株。前茬水稻,基肥每亩草塘泥200担,手扶拖拉机耕翻一次,深3.5寸,人工削整2次。移栽时施随根肥每亩碳铵30斤,过磷酸钙100斤;追肥:12月8日每亩氨水60斤,1月9日氨水80斤,中耕松土5次;抗旱:11月18日移栽后沟灌,12 Rape yield is not high and unstable many factors, including the quality of the seedling is one of the main factors affecting the yield. In 1982, I stood in the fourth production team of Xinmiao Brigade. According to the number of large green leaves, medium and small seedlings of rapeseed, we conducted experiments. Test varieties for the 7401 (late maturity), sowing on October 5, with the amount of 1.2 kg per mu. Seedling cotton crop before the emergence of October 9. On October 23, 5 kg of urea was applied per mu, and on November 15, Mushi 12 was doused. Before ditchling, ditch irrigation was carried out. Transplanting November 18, the density of 9449 plants. Before the crop of rice, basal fertilizer 200 mu per mu of grass pond, walking tractor plowing a time, 3.5 inches deep, manual cut 2 times. Transplantation with root fertilizer per acre ammonium 30 kg, superphosphate 100 kg; Top dressing: December 8 ammonia 60 kg per acre, January 9 ammonia 80 pounds, unclaimed soil 5 times; Drought: November 18 days after transplanting furrow irrigation, 12