不同类型的缓/控释肥对玉米氮素吸收及土壤速效氮的影响
本文通过盆栽试验,研究几种缓/控释肥一次性施用对玉米氮素吸收和土壤速效氮的影响。结果表明：与不施氮处理相比,施用氮肥具有显著的增产效果,相同施氮量的条件下,一次性施用不同类型的缓/控释肥的产量之间存在显著差异。乐喜施、鲁西化工处理的产量显著高于金正大和益多保处理,增产达到7.3%-11.8%。在成熟期,乐喜施、鲁西化工和益多保处理的植株氮素积累量显著高于金正大和施可丰处理。这几种缓/控释肥在土壤中的氮素释放天数在60天左右,释放高峰在播种后32天前后,之后土壤速效氮含量呈下降趋势。
英文摘要:
The pot experiment was carried out to study the effect of maize nitrogen uptake and soil available N on several styles slow/ controlled release fertilizers one time application. The result showed that, compared with N0 treatment, the nitrogen fertilizer application increases the yields significantly. Under the same N fertilizer application amount, the yield of one-time application different styles slow/controlled release fertilizer has significant difference. Lexishi, Luxihuagong treatments’ yield was significant higher than Jinzhengda and Yiduobao by 18.7%-21.14%. In mature, the plant N accumulation of Lexishi, Luxihuagong and Yiduobao was higher than Jinzhengda and Shikefeng significantly. These slow/controlled release fertilizer release available N in soil about 60 days, the peak of release was before and after 32 days after planting, and then, soil available N content appeared a decreasing trend.
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