| 不同利用方式对紫色土团聚体形成的影响 |
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| 引用本文： | 侯春霞,骆东奇,谢德体,魏朝富,朱波.不同利用方式对紫色土团聚体形成的影响[J].西南农业大学学报,2003,25(5):467-470. |
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| 作者姓名： | 侯春霞 骆东奇 谢德体 魏朝富 朱波 |
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| 作者单位： | 西南农业大学资源环境学院，西南农业大学资源环境学院，西南农业大学资源环境学院，西南农业大学资源环境学院，中国科学院水利部成都山地灾害与环境研究所 重庆 400716，重庆 400716，重庆 400716，重庆 400716，四川 成都 610041 |
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| 基金项目： | 教育部博士点基金(2000062505)资助项目 |
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| 摘 要： | 通过对不同利用方式下紫色土团粒结构、肥力状况及相互关系进行初步研究,结果表明:>5 mm水稳定性团聚体含量顺序为:林草地>林地>耕地>菜地>草地>柑桔园地>梨园地;>0.25 mm水稳定性团聚体含量为:林草地>林地>耕地>梨园地>菜地>草地>柑桔园地,>5 mm水稳定性团聚体数量及团聚体的水稳定性均与有机质的含量成正相关;粘粒除了与>5 mm的团聚体成负相关之外,与其余的粒级团聚体成正相关,团聚体与结构破坏率的关系较密切,结构破坏率与>5 mm和>0.25 mm团聚体均成正相关,而和水稳性团聚体成显著负相关,与有机质和粘粒的含量成负相关;分析结果同时也说明了有机质对团聚体的作用大于粘粒对团聚体的影响,而且团聚体含量主要与有机物的数量有关,受粘粒的影响较小。
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| 关 键 词： | 土壤团聚体 紫色土 有机质 粘粒 |
| 文章编号： | 1000-2642(2003)05-0467-04 |
| 修稿时间： | 2003年6月2日 |
AGGREGATE FORMATION IN PUTPLISH SOIL AS INFLUENCED BY LAND USE |
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| HOU Chun-xia,LUO Dong-qi,XIE De-ti,WEI Chao-fu,ZHU Bo.AGGREGATE FORMATION IN PUTPLISH SOIL AS INFLUENCED BY LAND USE[J].Journal of Southwest Agricultural University,2003,25(5):467-470. |
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| Authors: | HOU Chun-xia LUO Dong-qi XIE De-ti WEI Chao-fu ZHU Bo |
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| Abstract: | A preliminary study was made of the granular structure and fertility of purplish soils and their relationship under different land use modes. The content of >5 mm water-stabilized aggregates in the soil was found to be in the order: wood-grass land > woodland > plow land > vegetable plot > grassland > orange orchard > pear orchard; and the order for >0. 25 mm water-stabilized aggregates was wood-grass land > woodland > plow land > pear orchard > vegetable plot > grassland > orange orchard. The number of >5 mm water-stabilized aggregates and their water stability appeared to be positively correlated with organic matter content of the soil. Clay was positively correlated with aggregates of various sizes with the exception of the > 5 mm air-dry aggregate, which was negatively correlated with clay. The percentage of aggregate destruction was correlated positively with >5 mm and >0. 25 mm air dry aggregates and negatively with the contents of organic matter and clay. Organic matter seemed to have a greater effect on aggregates than clay did, and the contents of water-stabilized aggregate were more closely related to the content of organic matter than to clay. |
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| Keywords: | soil aggregate purplish soil organic matter clay |
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