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通过田间小区试验,研究NAM添加剂在水稻减氮施肥的情况下,对土壤NH4+-N、NO3--N含量、水稻产量以及氮肥利用率的影响,旨在验证利用NAM添加剂减少当地水稻施氮量的可行性。结果表明,施用NAM添加剂,在一定的时间内,使土壤NH4+-N保持较高的水平,延缓土壤NH4+-N向NO3--N的转化,减少氮素损失,从而保证总有效氮能够满足作物后期的生长需要。NAM添加剂能够有效地增加水稻产量,常规施肥不添加NAM处理的产量为9676.93 kg hm-2,与常规施肥添加NAM的处理差异显著,而与减氮20%添加NAM处理差异不显著。与常规施肥氮肥利用率33.94%相比,NAM添加剂能够将氮肥的利用率提高到40.58%,并且氮肥的利用率随着施氮量的减少而增加。研究试验表明,在欲节氮减肥的水稻生产中,NAM不失为一种理想的添加剂。
The field experiment was conducted to study the effect of NAM additive on soil NH4 + -N, NO3 - N content, rice yield and N use efficiency under the conditions of nitrogen fertilization by rice to verify the use of NAM additive to reduce the nitrogen application rate Feasibility. The results showed that the application of NAM additive could keep the soil NH4 + -N at a high level for a certain period of time, slow the conversion of soil NH4 + -N to NO3 - N and reduce the nitrogen loss so as to ensure that the total available nitrogen could meet the needs of crops Late growth needs. NAM additive can effectively increase the yield of rice. The yield of NAM without conventional N fertilizer was 9676.93 kg hm-2, which was significantly different from that of NAM with conventional fertilization, but no significant difference with NAM with 20% of N added. Compared with the conventional fertilizer application rate of 33.94%, NAM additive can increase the utilization of nitrogen fertilizer to 40.58%, and the nitrogen use efficiency increased with the decrease of nitrogen application rate. Research shows that NAM is an ideal additive in the production of rice for reducing weight and reducing weight.