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1.巧施薹肥,增施钾肥蕾薹期是油菜春发搭架子的关键时期,此时需肥量较大,约占总需肥量的50%。基肥和腊肥施用不足苗势弱,长势差的田块应早施,重施抽薹肥,薹高3~5厘米时,每667平方米施尿素12.5~15.0千克加钾肥15千克或三元复合肥30~35千克。苗势过旺的田块抽薹肥应适当迟施轻施。2.补施花肥,防“花而不实”油菜“花而不实”现象由缺硼引起,杂交双低油菜需硼量大,对硼元素敏感更
1. Qiao Shi Ling fertilizer, increasing the application of potassium Lei bolting stage is the rape spring hair shelves of the critical period, at this time larger amount of fertilizer, accounting for about 50% of the total amount of fertilizer. Basal and waxy fertilizer under-applied seedling weak, poor growing plots should be early Shi, re-implementation of bolting fertilizer, high sprouts 3 to 5 cm, applying urea per 667 square meters 12.5 to 15.0 kg plus potassium 15 kg or ternary complex Fertilizer 30 to 35 kg. Potential tide over the field of bolting fertilizer should be appropriate late Shi Shi. 2. Replenishment of fertilizer, anti- “flower and not ” Rape “flower and not real ” phenomenon caused by boron deficiency, hybrid double canola needs a large amount of boron, more sensitive to boron