搞好油菜开花结角期的田间管理,是夺取油菜高产的最后一环。主要措施是:(一)补施花肥防早衰。盛花期至终花期进行根外追肥,可延长无柄叶、角果和茎秆的功能期、增粒壮籽。根外追肥以喷施磷钾肥为主,对于叶色淡而早衰的田块可适当配施氮肥,每亩用磷酸=氢钾150克加尿素50～100 Do a good job rape blossom knot field management, is to win the last part of rapeseed yield. The main measures are: (a) make up fertilizer anti premature senility. Florescence and flowering at the end of flowering top dressing, can extend the function of stemless leaves, fruit and stalk, increased grain strong seed. Root top dressing to spray phosphorus and potassium-based, for the leaf color of the premature decline of the field can be properly equipped with nitrogen fertilizer, per acre with hydrogen phosphate 150 grams plus urea 50 ~ 100