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首页> 外文期刊>The Science of the Total Environment >Responses of soil specific enzyme activities to short-term land use conversions in a salt-affected region, northeastern China
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Responses of soil specific enzyme activities to short-term land use conversions in a salt-affected region, northeastern China

机译：中国东北盐碱地土壤特定酶活性对短期土地利用转化的响应

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摘要

Soil enzyme activity is a sensitive indicator of soil quality changes. The response of soil enzyme activity to different land uses is important in addressing the issues of agricultural sustainability. The objectives of this study were to investigate the effects of short-term land use conversions on soil specific enzyme activity (per unit microbial biomass carbon) of sodic soils and compare the responses of soil absolute (per unit soil mass) and specific enzyme activities in northeastern China. Four specific enzyme activities, including catalase, invertase, urease and alkaline phosphatase were assayed at 0 to 20 cm depth under five land uses, including cropland (CL), alfalfa perennial forage (AF), monoculture grassland (AG), monoculture grassland for hay once a year (AG + M) and successional regrowth grassland (RG). The specific activities of catalase, urease and alkaline phosphatase at 10 to 20 cm depth were 117.3%, 40.0% and 35.6% higher than that in 0 to 10 cm depth, irrespective to the land uses. Conversion of cropland to re-vegetation land increased the specific activities of catalase (2.8%), invertase (99.0%), urease (14.3%) and alkaline phosphatase (14.0%). Under land uses of AF, AG + M, AG and RG, the geometric mean (0.2%, 32.8%, 65.7% and 24.3%, respectively) and sum (2.6%, 38.0%, 82.8% and 29.6%, respectively) of specific enzyme activities at 0 to 20 cm depth were higher than that under CL treatment. The soil specific enzyme activities showed the better discrimination to different land uses than the soil absolute enzyme activities. In conclusion, re-vegetation has a positive effect on the improvement of soil enzyme activity in northeastern China, and the responses of soil specific enzyme activities to short-term land-use conversions aremore obvious than the absolute enzyme activities, which could be used as s suitable and sensitive indicator of land use change in semiarid agroecosystems. (C) 2019 Elsevier B.V. All rights reserved.
机译：土壤酶活性是土壤质量变化的敏感指标。土壤酶活性对不同土地利用的响应对于解决农业可持续性问题很重要。这项研究的目的是调查短期土地利用转换对苏打土壤的土壤比酶活性（每单位微生物生物量碳）的影响，并比较土壤绝对（每单位土壤质量）和比酶活性的响应。中国东北。在5种土地利用下，在0至20 cm的深度下测定了四种特定的酶活性，包括过氧化氢酶，转化酶，脲酶和碱性磷酸酶，包括耕地（CL），苜蓿多年生饲草（AF），单一栽培草原（AG），单一栽培干草干草每年一次（AG + M）和连续的再生草地（RG）。与土地用途无关，在10至20厘米深度处的过氧化氢酶，脲酶和碱性磷酸酶的比活度分别比0至10厘米深度分别高117.3％，40.0％和35.6％。退耕还林增加了过氧化氢酶（2.8％），转化酶（99.0％），脲酶（14.3％）和碱性磷酸酶（14.0％）的比活。在AF，AG + M，AG和RG的土地用途下，其几何平均值（分别为0.2％，32.8％，65.7％和24.3％）和总和（分别为2.6％，38.0％，82.8％和29.6％）在0至20cm深度处的比酶活性高于在CL处理下的比酶活性。与土壤绝对酶活度相比，土壤特定酶活度对不同土地利用的区分度更好。综上所述，植被恢复对改善东北地区土壤酶活性具有积极的作用，土壤特定酶活性对短期土地利用转化的响应比绝对酶活性更明显，可以用作研究对象。半干旱农业生态系统中土地利用变化的合适且敏感的指标。 （C）2019 Elsevier B.V.保留所有权利。

著录项

  • 来源
    《The Science of the Total Environment》 |2019年第15期|939-945|共7页
  • 作者

    Yu Pujia; Tang Xuguang; Zhang Aichun; Fan Gaohua; Liu Shiwei;

  • 作者单位

    Southwest Univ, Sch Geog Sci, Chongqing Jinfo Mt Field Sci Observat & Res Stn K, Chongqing 400715, Peoples R China|Chinese Acad Sci, Northeast Inst Geog & Agroecol, Changhcun 130102, Jilin, Peoples R China|Southwest Univ, Sch Geog Sci, Minist Nat Resources, Res Base Karst Ecoenvironm Nanchuan Chongqing, Chongqing 400715, Peoples R China|Southwest Univ, State Cultivat Base Ecoagr Southwest Mt Land, Chongqing 400715, Peoples R China;

    Southwest Univ, Sch Geog Sci, Chongqing Jinfo Mt Field Sci Observat & Res Stn K, Chongqing 400715, Peoples R China|Southwest Univ, Sch Geog Sci, Minist Nat Resources, Res Base Karst Ecoenvironm Nanchuan Chongqing, Chongqing 400715, Peoples R China|Southwest Univ, State Cultivat Base Ecoagr Southwest Mt Land, Chongqing 400715, Peoples R China;

    Chongqing Univ Posts & Telecom, Coll Mobile Telecommun, Chongqing 401520, Peoples R China;

    Chinese Acad Sci, Northeast Inst Geog & Agroecol, Changhcun 130102, Jilin, Peoples R China;

    Southwest Univ, Sch Geog Sci, Chongqing Jinfo Mt Field Sci Observat & Res Stn K, Chongqing 400715, Peoples R China|Chinese Acad Sci, Northeast Inst Geog & Agroecol, Changhcun 130102, Jilin, Peoples R China|Southwest Univ, Sch Geog Sci, Minist Nat Resources, Res Base Karst Ecoenvironm Nanchuan Chongqing, Chongqing 400715, Peoples R China|Southwest Univ, State Cultivat Base Ecoagr Southwest Mt Land, Chongqing 400715, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Re-vegetation; Solonetz; Geometric mean; Soil enzyme activity;

    机译：重新植被;Solonetz;几何平均值;土酶活性;

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