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通过2a田间定位试验,研究渭北旱塬地区夏闲期插播并翻压不同豆科绿肥(长武怀豆、大豆和绿豆,夏休闲为对照)和施氮量(0、108、135、162kg.hm-2)对冬小麦生长及养分吸收的影响。结果表明:与休闲相比,连续2a夏闲期种植并翻压豆科绿肥不但能显著提高冬小麦分蘖数、总茎数、产量、植株氮磷钾养分质量分数和吸收量,而且还能提高小麦单位面积穗数。夏季休闲时,连续2a不施氮肥与施用氮肥(108、135、162kg.hm-2)相比,冬小麦产量显著降低。然而,夏闲期种植并翻压长武怀豆和大豆时,连续2a不施氮肥与施用氮肥(108、135、162kg.hm-2)相比,冬小麦并没有明显减产;此外,施氮量108、135和162kg.hm-2处理间小麦产量没有显著差异。
Field experiments were conducted to investigate the effects of nitrogen and nitrogen fertilization (0,108,135,162kg.hm) on summer legume planting in Weibei arid highland, and turning over different leguminous green manure (Changwuhuodou, soybean and mung bean, summer leisure as control) -2) on the growth and nutrient absorption of winter wheat. The results showed that, compared with leisure, planting and turning over legume green manure for two consecutive years in summer can significantly increase tiller number, total stem number, yield, nitrogen and phosphorus nutrient content and absorption of winter wheat, but also increase wheat Spikes per unit area. In summer leisure, the yield of winter wheat was significantly lower than that of the non-application of nitrogen fertilizer for two consecutive years, compared with the application of nitrogen fertilizer (108, 135, 162kg.hm-2). However, no significant reduction of winter wheat yield was observed when applying nitrogen fertilizer for two consecutive years (108,135,162kg.hm-2) compared with 108a, There was no significant difference in wheat yields between treatments 135 and 162 kg.hm-2.