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通过一年田间小区试验,研究了棕壤地区施用MEISTER热塑性树脂包膜尿素对玉米和水稻生物性状、产量以及田间土壤NH+4-N和NO-3-N一直保4-N和NO-3-N的影响。结果表明,施用MEISTER包膜尿素能使土壤NH+持在较高水平,并且使玉米和水稻产量分别增加了5.1%和15.1%。当MEISTER包膜尿素施用量减少20%时,玉米和水稻产量与尿素追施处理相当,但玉米根和叶中氮的含量以及水稻秸杆和根中氮含量明显降低。MEISTER包膜尿素配施DCD没有进一步增加玉米和水稻的产量,DCD抑制土壤硝化作用的效果不稳定。
A field experiment in a field plot was conducted to study the effects of applying MEISTER thermoplastic resin coated urea in brown soil on the biological characters and yield of maize and rice and the contents of 4-N and NO-3 in soil NH + 4-N and NO-3-N -N effect. The results showed that the application of MEISTER coated urea could maintain soil NH + at a high level and increase the yield of maize and rice by 5.1% and 15.1% respectively. When MEISTER coated urea was reduced by 20%, the yields of maize and rice were comparable to that of urea topdressing, but the content of nitrogen in corn roots and leaves and the nitrogen content in rice straw and roots were significantly reduced. The combination of MEISTER coated urea and DCD did not further increase the yield of maize and rice, and the effect of DCD on soil nitrification was not stable.