氮硅肥配施对水稻生长、产量及土壤肥力的影响

采用田间试验研究了氮硅肥配施对水稻生长、产量、养分吸收及土壤养分含量的影响。结果表明 ,氮、硅肥单施都能促进水稻生长及对养分的吸收 ,氮肥效果好于硅肥。氮硅肥配施下 ,水稻有效穗数、穗实粒数、千粒重、水稻产量以及水稻地上部生物量 ,植株氮、磷、钾、硅养分含量增幅均高于氮肥和硅肥单施。随施硅量增加 ,氮 /硅比率后期有明显下降趋势。氮硅配施提高了土壤速效氮含量和有效硅含量、降低了土壤速效钾含量 ,而对速效磷、pH、有机质及全氮无明显影响。

Effects of nitrogen and silicon applications on the growth and yield of rice and soil fertility

Field experiments were conducted to investigate the effects of nitrogen (N) application combined with silicon (Si) on the yield and growth of rice and soil nutrient status.The results showed that either nitrogen or silicon application could increase the yield and growth of rice,with the effect of nitrogen being better than that of silicon.Compared to nitrogen or silicon fertilization,the combined application could significantly increase the effective ear number per plant,filled grain number per ear,1000-grain weight,green-leaf number and yield at mature stage.The ratio of N to Si was significantly declined with the increase of silicon fertilizer during mature stage.Combined application of nitrogen with silicon could increase soil available nitrogen and silicon contents,decrease soil available potassium content,but had no significant effects on soil available phosphorus,organic matter,pH value and total nitrogen.