冬小麦不同畦灌施肥模式水氮分布田间试验

Field experiment on water and nitrogen distribution for winter wheat under border strip fertigation

基于冬小麦生长期间施用尿素获得的试验观测结果,分析不同畦灌施肥模式下沿畦长土壤水氮空间分布差异,开展畦灌施肥模式田间试验评价,探讨适宜的畦灌施肥运行方式。研究结果表明,畦灌施肥模式差异对有效贮存在作物根系层的土壤水分和土壤硝态氮占0～80 cm土层相应值的比重以及土壤水分空间分布均匀性不产生显著影响,但对沿畦长土壤硝态氮空间分布均匀性的影响却较为明显。基于入畦单宽流量4 L/(s.m)和灌溉全程均匀施肥的畦灌施肥运行方式,可在冬小麦生长期返青水和扬花水灌后2 d的作物有效根系层内,形成相对较高的土壤水氮空间分布均匀性,适合当地生产实践中采用。

Based on the field experiments for fertilizing the urea at the regreening stage and anthesis stage of winter wheat,the distribution of soil water and nitrate nitrogen under different border strip fertigation strategies were analyzed. Meanwhile the border strip fertigation performance was evaluated,and the suitable border strip fertigation strategy was proposed.The results showed that the ratios of soil water and nitrate nitrogen effectively stored in root zone and these in 0-80 cm soil layer were not signif...