Effect of Cultivation on Soil Organic Matter and Aggregate Stability

A.WILLIAMS; XING Bao-Shan; P.VENEMAN

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Effect of Cultivation on Soil Organic Matter and Aggregate Stability

机译：耕作对土壤有机质和团聚体稳定性的影响

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Agricultural sustainability relates directly to maintaining or enhancing soil quality. Soil quality studies in Canada during the 1980's showed that loss of soil organic matter (SOM) and soil aggregate stability was standard features of non-sustainable land management in agroecosystems. In this study total soil organic carbon (SOC), particulate organic matter (POM), POM-C as a percentage of total SOC, and aggregate stability were determined for three cultivated fields and three adjacent grassland fields to assess the impact of conventional agricultural management on soil quality. POM was investigated using solid-state 13C nuclear magnetic resonance (NMR) to determine any qualitative differences that may be attributed to cultivation. Results show a highly significant loss in total SOC, POM and aggregate stability in the cultivated fields as compared to the grassland fields and a significant loss of POM-C as a percentage of total SOC.Integrated results of the NMR spectra of the POM show a loss in carbohydrate-C and an increase in aromatic-C in the cultivated fields, which translates to a loss of biological lability in the organic matter. Conventional cultivation decreased the quantity and quality of SOM and caused a loss in aggregate stability resulting in an overall decline in soil quality.

机译：农业的可持续性直接关系到维持或提高土壤质量。 1980年代加拿大的土壤质量研究表明，土壤有机质（SOM）的丧失和土壤团聚体的稳定性是农业生态系统中非可持续土地管理的标准特征。在这项研究中，确定了三个耕地和三个邻近草地的土壤总有机碳（SOC），颗粒有机质（POM），POM-C（占总SOC的百分比）和团聚体稳定性，以评估常规农业管理的影响对土壤质量的影响。使用固态13C核磁共振（NMR）研究了POM，以确定可能归因于培养的任何质量差异。结果表明，与草地相比，耕地的总SOC，POM和聚集体稳定性损失显着，并且POM-C占总SOC的百分比显着降低.POM NMR谱的综合结果显示：耕地中碳水化合物-C的损失和芳香族-C的增加，这转化为有机物的生物不稳定性的损失。常规耕作降低了SOM的数量和质量，并导致骨料稳定性下降，导致土壤质量总体下降。

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来源
《土壤圈（英文版）》 |2005年第2期|255-262|共8页
作者
A.WILLIAMS; XING Bao-Shan; P.VENEMAN;
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作者单位

Department of Plant, Soil and Insect Sciences, University of Massachusetts, Amherst, MA 01003 (USA);

Department of Plant, Soil and Insect Sciences, University of Massachusetts, Amherst, MA 01003 (USA);

Northeast Institute of Geography and Agro-Ecology, Chinese Academy of Sciences, Harbin 150040 China;

Department of Plant, Soil and Insect Sciences, University of Massachusetts, Amherst, MA 01003 (USA);

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收录信息中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
原文格式 PDF
正文语种 chi
中图分类
关键词
aggregate stability; cultivation; NMR; particulate organic matter; soil organic matter;

机译：团聚体稳定性;培养;核磁共振;颗粒有机物;土壤有机物;

Effect of Cultivation on Soil Organic Matter and Aggregate Stability

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