含铜有机肥对土壤酶活性和微生物群落代谢的影响
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西北农林科技大学理学院,西北农林科技大学资源环境学院,西北农林科技大学资源环境学院,西北农林科技大学资源环境学院,西北农林科技大学资源环境学院,西北农林科技大学理学院

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国家自然科学基金(40871119,41171203);农业部948项目(2010-Z20)


Effects of organic materials containing copper on soil enzyme activity and microbial community
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College of Sciences,Northwest Agriculture and Forestry University,College of Resources and Environment,Northwest Agriculture and Forestry University,College of Resources and Environment,Northwest Agriculture and Forestry University,College of Resources and Environment,Northwest Agriculture and Forestry University,College of Resources and Environment,Northwest Agriculture and Forestry University,College of Sciences,Northwest Agriculture and Forestry University

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    摘要:

    以猪粪和麦秆为原料,向原料中添加不同浓度硫酸铜溶液模拟原料铜污染堆制有机肥,通过小白菜盆栽试验施用堆制腐熟的有机肥,研究其对土壤酶活性及群落功能多样性的影响。结果表明,与CK处理(Cu质量分数10.35mg/kg)相比, L处理(Cu质量分数300.00mg/kg)的脱氢酶活性下降了64.75%,H处理(Cu质量分数900.00 mg/kg)的脱氢酶活性下降了90.66%。在Biolog生态测试板(ECO Microplate)温育过程中,CK处理的AWCD值(Average Well Color Development)始终大于L处理和H处理。与CK处理相比,L处理和H处理96h的AWCD值分别下降了3.55%、36.59%,CK处理显著高于H处理(P<0.01)。多样性指数对含Cu有机肥有不同的响应,L处理的shannon指数最高,H处理的simpson指数最高,CK处理的Mclntosh指数及Mclntosh均匀度最高。主成分分析结果表明,对3个处理起分异作用的碳源主要是糖类和羧酸类。

    Abstract:

    Composted manure has been used for centuries in Chinese agricultural production, however, only in recent year, there has been growing concerns over the problem caused by manure amendment, such as the buildup of salt in the soil and the potential introduction of hazardous trace elements into human diet. The objective of this experiment was to investigate the influence of Cu containing organic manure on soil enzyme activity and the functional diversity of microbial community. A pot experiment was conducted by incorporating same quantity of composts with a range of Cu concentrations, which were produced by composting the raw materials of swine manure and wheat straw spiked with 3 levels of Cu: 0 mg/kg (control), 300 mg/kg (low Cu, referred to L thereafter) and 900 mg/kg (high Cu: H). The resulted soils after the cabbage harvest were used to investigate the soil enzyme activities and the diversity of microbial community function (Biolog #). The results showed that, the soil dehydrogenase activity declined by 64.75% in the low Cu containing compost treated soil and 90.66% in the high Cu compost treated soil as compared to the control treatment, suggested high Cu concentration in compost inhibits the soil dehydrogenase activity. The result of Biolog test showed that the average well color development (AWCD) of the control soil was greater than that of both the L and the H treatments during the process of the Biolog-ECO incubation. Compared with control treatment, AWCD of L and H treatments at 96 h had dropped by 3.55% and 36.59%, respectively. AWCD of H treatment was significantly lower than that of control (P<0.01). The most microorganisms in control soil had higher ability to use carbon source than those in L and H treatments. The soil microbial community diversity indices had different responses, the highest Shannon index was observed on L treatment, the highest Simpson index was on H treatment, and the highest Mclntosh index and Mclntosh evenness index on control treatment. The principal component analysis demonstrated that the significant difference between the three treatments mainly depend on carbohydrate and carboxylic acids dominated carbon sources. The results indicated that the Cu contained in the composted manure significantly inhibited the soil enzyme activity and microbial metabolism.

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陈琳,谷洁,高华,王小娟,胡婷,陈智学.含铜有机肥对土壤酶活性和微生物群落代谢的影响.生态学报,2012,32(12):3912~3920

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