新型控释肥对水稻产量与氮肥利用率的影响探讨

Effects of New Controlled Release Fertilizers on Rice Yield and Nitrogen Use Efficiency

以晚粳稻"秀水110"和"秀水11"为供试水稻品种,在田间条件下对金正大控释肥料对水稻产量及氮素利用效率的影响作了研究。控释肥掺混比例试验结果表明,与当地农民习惯施用普通尿素PU100%(N210kghm-2)处理相比,等氮量下一次性基施控释尿素CRU100%和CRU70%+PU30%处理产量为8242.3kghm-2和7694.2kghm-2,显著增产16.0%和8.2%;氮肥利用率为27.38%和26.57%,显著提高144.90%和137.66%。控释肥用量试验结果表明,与当地农民习惯施用普通尿素(N240kghm-2)相比,等氮量下一次性基施CRU100%产量为7021.4kghm-2,显著增产2.9%;氮肥利用率为36.80%,显著提高37.52%。

Using japonica varieties ＂XiuShui 110＂ and ＂ XiuShui 11＂,field experiments were carried out to test the effects of new controlled release fertilizers on rice yield and nitrogen use efficiency.Results showed that compared to PU 100% （Prilled Urea） at 210 kg N hm-2 in conventional fertilizer application,the rice grain yields were significantly increased 16.0% and 8.2% by a single basal application of CRU 100% （Controlled-release Urea） and CRU 70% ＋ PU 30% which were 8242.3 kg hm-2 and 7694.2 kg hm-2,and the nitrogen use efficiencies were 27.38% and 26.57% which were significantly increased 144.90% and 137.66%.Compared to PU 100% at 240 kg N hm-2,the rice grain yield was 7021.4 kg hm-2 which was significantly increased 2.9% and the nitrogen use efficiency was 36.80% which was significantly increased 37.52% by a single basal application of CRU 100%.