不同施肥措施对高纬地区小麦生长和氮肥利用率的影响

Effects of Different Fertilization Measures on Wheat Growth and Nitrogen Use Efficiency in High Latitude Region

为揭示不同施肥措施对高纬地区小麦生长及氮肥利用率的影响。选取内蒙古呼伦贝尔为研究区,采用野外观测和室内测定相结合的方式,研究了2种缓释肥和1种缺氮处理对高纬地区小麦生长及氮肥利用率的影响。结果表明,含有腐殖质的缓释肥对地上生物量的作用最大,增产了4.93%,使小麦产量增产了1.77%,含腐殖质的缓释肥提高了氮肥贡献率和氮肥农学效率,分别为8.71%和5.48 kg/kg,缺氮处理对小麦地上干生物量副作用最大,较常规施肥减产了4.9%。说明含腐殖质的缓释肥可有效促进高纬地区小麦的生产和提高氮肥利用率。

To reveal the effects of different fertilization measures on wheat growth and nitrogen utilization efficiency in high latitude areas.By combining field observation and indoor measurement to study the effects of two slow-release fertilizers and one nitrogen deficiency treatment on the growth and utilization-rate of nitrogen fertilizer in high latitude area.The results showed that the slow-release fertilizer containing humus had the greatest effect on aboveground biomass and yield,increased by 4.93%and 1.77%,respectively.The slow release fertilizer containing humus increased the contribution rate of nitrogen fertilizer and the agronomic efficiency of nitrogen fertilizer,with the amount of 8.71%and 5.48 kg/kg,respectively.The nitrogen deficiency treatment had the largest side effect on the dry biomass of wheat,which was 4.9%lower than the conventional fertilization.The results showed that the slow release fertilizer containing humus could effectively promote the production of wheat and improve the utilization rate of nitrogen fertilizer in high latitude areas.