氮素营养对油菜成熟期生物产量的调控

通过不同Ｎ肥处理的田间试验，研究Ｎ素营养对油菜成熟期地上部各部位生物产量的调节作用。结果表明，主茎的生物产量随施Ｎ量的增加而明显增加；分枝、果序和果壳重以及籽粒产量随施Ｎ量的增加先增后减。在生物产量中，果壳重与籽粒产量的关系最为密切，生产上保证前期主茎和要枝有一定生长量的基础上，通过合理施Ｎ以促进后期角果的生长，提高果壳的重量可提高籽粒产量。

Regulation of N nutrition to biomass of oilseed rape in ripening stage

s: The trials were carried out through the treatment of different N application to research the regulation of N nutrition to biomass of different parts of rape plant in ripening stage. The results were as follows, the biomass of stem increased as the increasing of N nutrition application, while that of the branches, rachis and pod shell increased firstly and then decreased, which the same as seed yield. The pod shell wt. was closely related to the seed yield. In the oilseed rape cultivation, the seed yield could be increased through the promoting the growth of pod and increasing the pod shell wt.