Effect of biochar application on soil aggregates distribution and moisture retention in orchard soil

被引：0
|
作者：
An Y. [1 ]
Ji Q. [1 ]
Zhao S.-X. [1 ]
Wang X.-D. [1 ,2 ]
机构：
[1] College of Natural Resources and Environment, Northwest A&F University, Yangling
[2] Key Laboratory Plant Nutrition and the Agri-Environment in Northwest China, Ministry of Agriculture, Yangling
来源：
Huanjing Kexue/Environmental Science | 2016年 / 37卷 / 01期
关键词：
Biochar; Dark loessial soil; Soil aggregates; Soil organic carbon; Water retention;
D O I：
10.13227/j.hjkx.2016.01.038
中图分类号：
学科分类号：
摘要：
Applying biochar to soil has been considered to be one of the important practices in improving soil properties and increasing carbon sequestration. In order to investigate the effects of biochar application on soil aggregates distribution and its organic matter content and soil moisture constant in different size aggregates, various particle-size fractions of soil aggregates were obtained with the dry-screening method. The results showed that, compared to the treatment without biochar (CK), the application of biochar reduced the mass content of 5-8 mm and <0.25 mm soil aggregates at 0-10 cm soil horizon, while increased the content of 1-2 mm and 2-5 mm soil aggregates at this horizon, and the content of 1-2 mm aggregates significantly increased along with the rates of biochar application. The mean diameter of soil aggregates was reduced by biochar application at 0-10 cm soil horizon. However, the effect of biochar application on the mean diameter of soil aggregates at 10-20 cm soil horizon was not significant. Compared to CK, biochar application significantly increased soil organic carbon content in aggregates, especially in 1-2 mm aggregates which was increased by >70% compared to CK. Both the water holding capacity and soil porosity were significantly increased by biochar application. Furthermore, the neutral biochar was more effective than alkaline biochar in increasing soil moisture. © 2016, Science Press. All right reserved.
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页码：293 / 300
页数：7
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