沙土微生物多样性与土壤肥力质量的咸水滴灌效应
Effect of the saline water irrigation on soil microbial diversity and fertility quality in the Tarim desert highway shelter forest land
查看参考文献30篇
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文摘
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采用Biolog-eco法、PLFA法和PCR-DGGE法,对塔里木沙漠公路防护林中不同矿化度滴灌水作用下的土壤微生物多样性进行了研究,利用土壤综合肥力指数(IFI)定量评价了土壤综合肥力质量,分析了土壤肥力质量与土壤微生物的关系。结果表明:滴灌水条件下,土壤微生物的多样性(碳源代谢、遗传基因和脂肪酸种类)差异明显,而高矿化度滴灌水条件下土壤微生物活性较低。IFI值在不同矿化度灌水的林地间差异极显著,在不同土层间差异显著;IFI值随灌水矿化度升高而减小;0—5cm表层土壤的IFI值明显小于其下层的土壤。土壤微生物代谢多样性和脂肪酸多样性指数与土壤IFI值存在乘幂函数关系,而土壤微生物遗传多样性指数与IFI值有多项式关系,对土壤肥力质量起着明显的正向贡献。 |
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其他语种文摘
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Investigations of soil microbial diversities in the Tarim desert highway shelter forest lands drip-irrigated with saline water with methods of Biolog-eco, PLFA and PCR-DGGE, and evaluation of the soil fertility qualities using integrated fertility index (IFI) method, were conducted in this work; the relationship between soil microbial diversity and IFI values were also revealed. The main results are below: (1) Notable differences on diversities of carbon metabolism, genetic gene and fatty acid were found among the sandy soils drip-irrigated with different saline water (F > F_(0.05)); The water with higher mineralization reduced the soil microbial activity. (2) The notably significant differences of soil IFI values were found among the forest lands with different plantation times (F > F_(0.01)); Meanwhile, the vertical variation of IFI values at the different soil layers were also markable (F>F_(0.05)), the value at 0—5 cm was the least, and the IFI value decreased with increase of mineralization of the saline water. (3) There were power function relationships between the soil IFI values and the soil microbial diversities of carbon mechanism, fatty acid, but polynomial relationship existed in the IFI value and the soil microbial genetic gene. So, microbe population would contribute greatly to increase soil fertility in the Tarim desert highway shelter forest lands under saline water drip-irrigation. |
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来源
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生态学报
,2014,34(13):3720-3727 【核心库】
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DOI
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10.5846/stxb201211211644
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关键词
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风沙土
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咸水滴灌
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微生物多样性
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土壤质量
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地址
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中国科学院新疆生态与地理研究所, 乌鲁木齐, 830011
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-0933 |
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基金
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国家自然科学基金项目
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中国科学院西部之光人才培养计划
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文献收藏号
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CSCD:5193932
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