Effect of Different Amendments on Nitrogen Conservation During Simulated Composting

环境科学与工程:B Pub Date : 2019-06-28 DOI:10.17265/2162-5263/2019.06.002

Li Danyang, Qi Chuanren, Wei Yanan, Li Guoxue, Y. Jing

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Abstract

The objectives of this study were to evaluate the effects of different dosages of three amendments—peat, superphosphate, mixture of Mg(OH)2+H3PO4 ((Magnesium Hydroxide and Phosphorus Acid) on N (Nitrogen) conservation. The simulated composting experiment was carried out in a constant temperature water bath with pig manure and corn straw. The results showed that the ammonia volatilization could be inhibited to some extent under the treatments with fixing agents. Under the same simulated composting conditions, the nitrogen fixation effect of the three kinds of fixatives with the same proportion was as follows: Mg(OH)2+H3PO4 > superphosphate > peat. The fixation effect of N increased with the increase of the additives. The N fixation rate of Mg(OH)2+H3PO4 treatment was up to 66%. Compared with the CK (Control Group), the amount of cumulative ammonia emission decreased by 90.3% and the TN (Total Nitrogen) content increased by 39.31% in this treatment. Compared with other two kinds of fixing agents, Mg(OH)2+H3PO4 treatment could not only control N loss in composting process, improve the N nutrient content of compost products, but also could increase P (Phosphorus) and Mg (Magnesium) nutrients. Therefore, it had more popularization value and application prospect.

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模拟堆肥过程中不同改良剂对保氮效果的影响

本研究的目的是评估不同剂量的三种改良剂——泥炭、过磷酸钙、Mg（OH）2+H3PO4（氢氧化镁和磷酸）的混合物——对N（氮）保持的影响。采用猪粪和玉米秸秆在恒温水浴中进行模拟堆肥试验。结果表明，在固定剂处理下，氨的挥发可以得到一定程度的抑制。在相同的模拟堆肥条件下，相同比例的三种固定剂的固氮效果为：Mg（OH）2+H3PO4>过磷酸钙>泥炭。氮的固定效果随着添加剂的增加而增加。Mg（OH）2+H3PO4处理的固氮率高达66%。与对照组相比，该处理的累积氨排放量减少了90.3%，总氮含量增加了39.31%。与其他两种固定剂相比，Mg（OH）2+H3PO4处理不仅能控制堆肥过程中的氮损失，提高堆肥产品的氮营养含量，还能增加P（磷）和Mg（镁）的营养成分。因此，它具有更大的推广价值和应用前景。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

环境科学与工程:B

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575