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首页> 美国卫生研究院文献>PLoS Clinical Trials >Variations in eco-enzymatic stoichiometric and microbial characteristics in paddy soil as affected by long-term integrated organic-inorganic fertilization
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Variations in eco-enzymatic stoichiometric and microbial characteristics in paddy soil as affected by long-term integrated organic-inorganic fertilization

机译：长期有机-无机一体化施肥对水稻土生态酶化学计量和微生物特性的影响

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To investigate the effects of different nutrient management regimes on the soil chemical, eco-enzymatic stoichiometric and microbial characteristics, soil samples were collected from a 30-year, long-term field experiment with six plots growing rice. The results showed that as integrated fertilization increased, so did the concentrations of soil total or available nutrients and microbial biomass carbon (MBC). Our results also found enhanced soil basal respiration and cumulative carbon mineralization compared to chemical fertilization alone at the same nutrient doses. The activities of soil protease (Pro), β-glucosidase (βG), N-acetyl-glucosaminidase (NAG) and acid phosphatase (AP) from the integrated fertilization treatments were significantly higher than those of the treatments without organic manure, so did the activities of soil leucyl aminopeptidase (LAP) and urease (Ure) from the treatment with organic manure in addition to farmer practise fertilization (NPKM2). The stoichiometric ratios, expressed as lnβG/ln(NAG+LAP)/lnPro/lnUre/lnAP, ranged from 1:0.94:1.04:0.67:1.01 to 1:0.98:1.10:0.78:1.25, indicating that the acquisition of C, N and P changed consistently and synchronously under different nutrient management strategies. Integrated fertilization was more beneficial to the acquisition and utilization of soil organic carbon compared to low-molecular-weight organic nitrogen. We concluded that protease and urease should be considered in eco-enzymatic stoichiometric assessments for the hydrolysis of proteins, amino acids, carbohydrates and phosphomonoesters in soil, and integrated fertilization with chemical fertilizers and organic manure should be recommended as a preferable nutrient management system for intensive rice cultivation.
机译：为了研究不同的养分管理制度对土壤化学，生态酶化学计量和微生物特性的影响，从30年的长期田间试验中收集了六块水稻田的土壤样品。结果表明，随着综合施肥的增加，土壤总或有效养分和微生物生物量碳（MBC）的浓度也增加。我们的研究结果还发现，与在相同养分剂量下单独进行化学施肥相比，土壤基础呼吸和累积碳矿化作用增强。综合施肥处理的土壤蛋白酶（Pro），β-葡萄糖苷酶（βG），N-乙酰基葡萄糖苷酶（NAG）和酸性磷酸酶（AP）的活性显着高于无有机肥的土壤处理。有机肥处理以及农民耕作施肥（NPKM2）产生的土壤亮氨酰肽酶（LAP）和脲酶（Ure）的活性。表示为lnβG/ ln（NAG + LAP）/ lnPro / lnUre / lnAP的化学计量比范围为1：0.94：1.04：0.67：1.01至1：0.98：1.10：0.78：1.25，表明C，在不同的养分管理策略下，氮素和磷素变化一致且同步。与低分子量有机氮相比，综合施肥更有利于土壤有机碳的获取和利用。我们的结论是，在生态酶化学计量评估中应考虑蛋白酶和脲酶，以评估土壤中蛋白质，氨基酸，碳水化合物和磷酸单酯的水解，并建议将化肥和有机肥料综合施肥，作为集约化的优选养分管理系统水稻种植。

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