施用生物炭对农田生态系统影响的研究进展

被引：50

作者：

黄剑

张庆忠

杜章留

王一丁

机构：

[1] 中国农业科学院农业环境与可持续发展研究所/农业部农业环境重点实验室

来源：

中国农业气象 | 2012年 / 33卷 / 02期

关键词：

生物炭; 农田生态系统; 作物生产力; 土壤生物; 温室气体;

D O I：

暂无

中图分类号：

S154.1 [土壤生态学];

学科分类号：

071012 ; 0713 ;

摘要：

从施用生物炭对土壤理化性状、土壤生物、土壤碳截留、作物产量、温室气体排放的影响等方面,总结分析了施用生物炭对农田生态系统的影响。结果表明,施用生物炭能够改善土壤理化特性和微生物生境,提高养分利用率,但对作物的增产效应具有一定的不确定性。生物炭的稳定性对增加农田土壤碳截留有重要作用,其降解过程目前尚不清楚。添加生物炭影响土壤有机质分解即激发效应,但激发效应的方向和幅度的变异较大。在影响温室气体排放方面,施用生物炭能有效减少N2O排放,但对CO2和CH4的减排效应具有较大的不确定性,生物炭的性质、施用量、土壤类型和肥力状况等因素是导致这些不确定性的主要原因,今后应综合考虑以上因素开展长期定位试验,客观评价生物炭对农田生态系统功能的影响和作用。

引用

页码：232 / 239

页数：8

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