INFLUENCE OF LODGING AND NITROGEN RATE ON THE YIELD AND YIELD ATTRIBUTES OF OILSEED RAPE (BRASSICA-NAPUS L)
INFLUENCE OF LODGING AND NITROGEN RATE ON THE YIELD AND YIELD ATTRIBUTES OF OILSEED RAPE (BRASSICA-NAPUS L)
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DOI：
10.1007/bf01240914
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发表时间：
1994-07-01
影响因子：
5.4
通讯作者：
EVANS, EJ
中科院分区：
文献类型：
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作者：
ISLAM, N;EVANS, EJ
以甘蓝型油菜（Brassica napus L.）为试验材料，研究了倒伏和施氮量对油菜籽粒产量的影响。产量下降的原因是每一个产量组成部分的显著减少，加上地面上茎断引起的植物种群减少。倒伏还降低了作物的最终干重和收获指数。施氮量为200 kg ha（-1）时，种子产量也低于施氮量为400 kg ha（-1）时。荚果数m（-2）、种子数荚果数（-1）和种子重普遍减少，导致产量下降。施用400 kg ha（-1）氮肥改变了总状花序和单枝对种子产量的贡献。在400 kg ha（-1）处理时，籽粒含氮量和氮素产量增加，籽粒含油量和产量降低。
The effects of lodging and nitrogen rate were studied in a field trial of oilseed rape Brassica napus L. Lodging decreased seed yield (16%) compared with a frame-raised crop. Yield decreased because of a significant reduction in each of the yield components coupled with a reduced plant population caused by stem breakage at the ground level. Lodging also reduced the final crop dry weight and harvest index. Seed yield was also lower when 200 kg ha(-1) nitrogen was applied than with 400 kg ha(-1). A general decrease in pod number m(-2), seed nuber pod(-1) and seed weight caused the lower yields. The use of 400 kg ha(-1) of nitrogen changed the contribution of the terminal raceme and individual branches with respect to seed yield. Seed nitrogn content and nitrogen yield increased at the 400 kg ha(-1), lowering both seed oil content and oil yield.