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1.精细整地.增施底肥。油菜种子很小,萌发出土力差,苗期根系又不发达,要求有一个疏松、肥沃的土壤条件。因此在精细整地的基础上,要增施有机肥。亩产200公斤以上,需施农家肥4000～5000公斤。高山区还要增施磷钾肥,以促进早熟。2.适期早播。在海拔2500米左右地区.一般于谷雨(4月21日)前播种为宜;海拔2300米以下地区.于3月28日前后播种为宜。3.及时防治虫害。甘蓝型油菜苗期最怕跳(虫甲)危害.因此在油菜出苗后2～3叶期用敌百虫500倍液或甲基异柳磷1000倍液喷防,每隔5～7天喷一次(连喷几次)。后期若发生蚜虫可用乐果乳荆或敌敌畏乳剂1000倍液喷雾,均有良好效果。4.及时间苗、定苗,合理密植。油菜种子每公斤约28万粒.亩下籽0.5～0.75公斤。如果出苗稠密,相互遮阴,争光,争肥,不及时间苗、定苗就会造
1. Fine preparation of soil. Rape seeds are small, poor germination unearthed, seedling root and underdeveloped, requires a loose, fertile soil conditions. Therefore, on the basis of fine preparation, organic fertilizer should be added. 200 kilograms per mu or more, the need for farmers 4000 to 5000 kg. Pok Pok also increase the high mountain area to promote premature. Early sowing on schedule. At about 2500 meters above sea level, it is advisable to sow before Guyu (April 21) and below 2300 meters above sea level. 3 timely control pests. Brassica napus is most afraid of jumping at the seedling stage (pest) hazards.Therefore, 2 to 3 leaves after emergence of rape with trichlorfon 500 times or methyl isofiomycin 1000 times spray prevention, spray every 5 to 7 days Once (even spray several times). Late aphid can be used if dimethoate or dimethoate emulsion 1000 times spray, have good results. 4 and time seedlings, Dingmiao, reasonable close planting. About 280,000 seeds per kilogram of rapeseed seed 0.5 ~ 0.75 kilograms of seed. If the emergence of dense, shade each other, win glory, fight fat, less time seedlings, Dingmiao will create