摘要
油菜整个生育期中前期需氮较多，后期较少，随着生育期变化，氮素由营养器官向生殖器官转移。河南省砂姜黑土区的土壤肥力差异较大，必须因土施肥，一般施氮量应为１４２．５～２０２．５ｋｇ／ｈｍ２，施氮方法以底、追结合的效果最好。
In the whole growing period, rape seed absorbed more N in early stage than that in later . With the change of growing period, N transported from nutrient organs to reproductire organs. There is the significant different among the soil fertility in the different Shajong black soil areas. So fertilization should be emphasized according to soil fertility. Suitable application amount of N is 142.5～202.5kg/hm 2. The best result will be got when base Fertilizer is combined with topdressing.
出处
《中国农学通报》
CSCD
1998年第5期33-35,共3页
Chinese Agricultural Science Bulletin
关键词
油菜
需氮
氮肥
合理运筹
砂姜黑土
Hybrid rape \ Nitrogen uptake feature \ Nitrogenous fertilizer
