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首页> 美国卫生研究院文献>PLoS Clinical Trials >The dynamics of nitrogen derived from a chemical nitrogen fertilizer with treated swine slurry in paddy soil-plant systems
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The dynamics of nitrogen derived from a chemical nitrogen fertilizer with treated swine slurry in paddy soil-plant systems

机译：水稻土-植物系统中处理过的猪粪浆中化学氮肥衍生的氮的动力学

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摘要

A well-managed chemical nitrogen (N) fertilization practice combined with treated swine slurry (TSS) is necessary to improve sustainability and N use efficiency in rice farming. However, little is known about the fate of N derived from chemical N fertilizer with and without TSS in paddy soil-plant systems. The objectives of this study were (1) to estimate the contribution of applied N fertilizer to N turnover in rice paddy soil with different N fertilization practices that were manipulated by the quantity of treated swine slurry and chemical N fertilizer (i.e., HTSS+LAS, a high amount of TSS with a low amount of ammonium sulfate; LTSS+HAS, a low amount of TSS with a high amount of ammonium sulfate; AS, ammonium sulfate with phosphorus and potassium; C, the control) and (2) to compare the rice response to applied N derived from each N fertilization practice. Rice biomass yield, 15N recovery in both rice grain and stems, soil total N (TN), soil inorganic N, and soil 15N recovery were analyzed. Similar amounts of 15N uptake by rice in the TSS+AS plots were obtained, indicating that the effects of the different quantities of TSS on chemical fertilizer N recovery in rice during the experimental period were not significant. The soil 15N recoveries of HTSS+LAS, LTSS+HAS, and AS in each soil layer were not significantly different. For the HTSS+LAS, LTSS+HAS and AS applications, total 15N recoveries were 42%, 43% and 54%, respectively. Because the effects of reducing the use of chemical N fertilizer were attributed to enhancing soil quality and cost-effectiveness, HTSS+LAS could be an appropriate N fertilization practice for improving the long-term sustainability of paddy soil-plant systems. However, N losses, especially through the coupled nitrification-denitrification process, can diminish the benefits that HTSS+LAS offers.
机译：良好管理的化学氮（N）施肥实践与处理过的猪粪（TSS）相结合对于提高水稻种植的可持续性和氮的利用效率是必要的。但是，对于水稻土-植物系统中含或不含TSS的化学氮肥衍生的氮的命运知之甚少。这项研究的目的是（1）估算不同氮肥施用方式对水稻田土壤中氮素转化对氮素转化的贡献，氮肥施用量受处理的猪粪和化学氮肥（即HTSS + LAS，大量的TSS和少量的硫酸铵; LTSS + HAS，少量的TSS和大量的硫酸铵; AS，硫酸铵和磷和钾; C，对照）和（2）比较水稻对每种氮肥施用方式中施用的氮素的反应。分析了水稻生物量产量，水稻籽粒和茎中 15 N的恢复，土壤总氮（TN），土壤无机氮和土壤 15 N的恢复。在TSS + AS图中，水稻对 15 N的吸收量相似，表明在试验期间，不同量的TSS对水稻化学肥料氮素回收的影响不显着。各土层中HTSS + LAS，LTSS + HAS和AS的土壤 15 N回收率差异不显着。对于HTSS + LAS，LTSS + HAS和AS应用， 15 N的总回收率分别为42％，43％和54％。由于减少使用化学氮肥的效果归因于提高土壤质量和成本效益，因此HTSS + LAS可以作为一种适当的氮肥施用方式，以改善稻田土壤－植物系统的长期可持续性。但是，氮的损失，特别是通过耦合的硝化-反硝化过程，会减少HTSS + LAS提供的好处。

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