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在中国农业大学曲周试验站的潮土上进行2种不同模式的玉米秸秆还田试验,为期1年。结果发现玉米秸秆还田后前期由于能减少可溶性N的淋失,后期又释放出N,从而提高了N的利用率。土壤NO3--N含量随作物生长季节变化明显,而NH4+-N具有稳定性;土壤微生物N变化同秸秆分解状况相一致。多数时间内整翻处理的微生物N高于粉碎处理。
Two different modes of corn stalks were tested on the soil and water of Quzhou Experimental Station of China Agricultural University for one year. The results showed that the early corn stalk can reduce the leaching of soluble N and release N at the later stage, thus improving the utilization rate of N. The content of NO3 - N in soil changed obviously with the season of crop growth, while the stability of NH4 + -N was stable. The change of soil microbial N was in accordance with the situation of straw decomposition. Most of the time the entire turn of the microbial N treatment is higher than the crushing treatment.