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| 黄土高原旱地保护性耕作农田土壤团聚体特性变化研究 | |
| 引用本文： | 赵如浪,冯佰利,蒋树怀,张小东,屈洋,蔡晓青,朱瑞祥.黄土高原旱地保护性耕作农田土壤团聚体特性变化研究[J].中国农业大学学报,2011,16(4):74-79. |
| 作者姓名： | 赵如浪 冯佰利 蒋树怀 张小东 屈洋 蔡晓青 朱瑞祥 |
| 作者单位： | 1. 西北农林科技大学农学院,陕西杨凌,712100 2. 陕西省黄陵县农机局,陕西黄陵,727300 3. 西北农林科技大学机械与电子工程学院,陕西杨凌,712100 |
| 基金项目： | 农业部先正达农业科教及农村发展项目; 公益性行业(农业)科研专项经费资助(200903007) |
| 摘 要： | 以春玉米品种沈玉17为材料,设置保护性耕作（NT）、传统耕作＋秸秆还田（TS）和传统耕作（CT）3种耕作方式,通过多年定位试验,研究黄土高原旱塬地保护性耕作农田土壤有机质及团聚体特性的变化。结果表明,NT与TS和CT相比能显著提高土壤有机质含量。干筛法分析结果表明,0-30 cm深度,NT处理粒径〉0.25mm的大团聚体含量、平均重量直径（mean weight diameter,MWD）均显著高于TS和CT处理。湿筛法分析结果表明,水稳性团聚体MWD在0-10 cm深度为NT〉TS〉CT,处理间差异显著（P〈0.05）;0-20 cm深度,NT处理土壤团聚体破坏率均低于CT处理。保护性耕作能促进土壤团聚体的形成,提高团聚体的稳定性,而传统耕作则由于人为扰乱土层结构,降低了土壤团聚体数量和稳定性。 |
| 关 键 词： | 黄土高原 保护性耕作 有机质 团聚体 平均重量直径 |
| 收稿时间： | 2010/10/20 0:00:00 |
Effects of conservation tillage on soil aggregatesin dry land of loess plateau |
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| ZHAO Ru-lang,FENG Bai-li,JIANG Shu-huai,ZHANG Xiao-dong,QU Yang,CAI Xiao-qing and ZHU Rui-xiang.Effects of conservation tillage on soil aggregatesin dry land of loess plateau[J].Journal of China Agricultural University,2011,16(4):74-79. | |
| Authors: | ZHAO Ru-lang FENG Bai-li JIANG Shu-huai ZHANG Xiao-dong QU Yang CAI Xiao-qing and ZHU Rui-xiang |
| Institution: | ZHAO Ru-lang 1,FENG Bai-li1,JIANG Shu-huai1,ZHANG Xiao-dong1,QU Yang1,CAI Xiao-qing2,ZHU Rui-xiang3(1.College of Agronomy,Northwest A & F University,Yangling 712100,China,2.Agricultural Mechanism Bureau,Huangling 727300,3.College of Mechanical and Electronic Engineering,Northwest A&F University,China) |
| Abstract: | The paper studied the effects of conservation tillage on the soil aggegate and organic carbon by years on Loess Plateau.The spring maize cultivars Shenyu17 were used in the test under three farming modes of No tillage(NT),conventional tillage+Straw returning(TS) and conventional tillage(CT).To study the effects,soil organic matter content was measured,and the aggregates composition,size distribution were examined by dry and wet sieving methods.The results showed that,NT significantly increased soil organic ... |
| Keywords: | loess plateau conservation tillage organic carbon soil aggregate MWD |
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