木质素缓释肥不同用量及运筹方式对杂交晚稻产量及农艺性状的影响

Effects of Lignin Slow Release Fertilizer Application Rate and Management on Agronomic Traits and Yield of Hybrid Late Rice

以籼粳杂交晚稻浙优18和甬优9号为试验材料,研究了木质素缓释肥不同用量及运筹方式对杂交晚稻产量、农艺性状及氮肥农学效率的影响,明确了木质素缓释肥适宜的施用量及运筹方式。结果表明,木质素缓释肥能显著提高晚稻成穗率,增加每穗实粒数和结实率。浙优18木质素缓释肥用量在750~1 050 kg/hm^2时,有利于提高肥料利用率,实现有效穗数、每穗实粒数和千粒重的平衡,促进高产群体的形成,进而实现高产稳产。双季晚稻生产上施用木质素缓释肥可降低水稻安全齐穗风险,与等养分常规肥料相比,产量增加3.00%;木质素缓释肥施用450 kg/hm^2加适量分蘖肥的处理,在氮肥用量减少26.75%的情况下,仍能实现高产稳产,具有减氮、稳产和控污多重效果。

The experiment was carried out to investigate the effects of lignin slow release fertilizer application rate and fertilizer management on yield, agronomic traits and N agronomic efficiency of late hybrid rice, and clarify the appropriate fertilizer amount and management of fertilizer. The results showed that the productive tiller percentage was increased significantly, filled grain numbers per panicle and seed setting rate were increased when the Lignin slow-release fertilizer was used in late rice. Lignin slow release fertilizer improved the N use efficiency at the application rates of 750~1 050 kg/hm2. Besides, lignin slow release fertilizer had the advantages to maintain adequate effective panicle number, filled grain numbers per panicle and I 000-grain weight and promote the formation of high yield population. Lignin slow release fertilizer decreased the risk of being unable to full heading in double late rice and increased the grain yield by 3.00% comparing with the equal nutrient conventional fertilization. Compared with the conventional fertilization, the yield of using lignin slow release fertilizer and tillering fertilizer treatment remained stable and high yield under the nitrogen fertilizer application reduced by 26.75%.