干旱区生态环境知识资源中心(Arid): Effect of Rotational Tillage on Soil Aggregates, Organic Carbon and Nitrogen in the Loess Plateau Area of China

Arid

DOI	10.1016/S1002-0160(13)60047-8
	Effect of Rotational Tillage on Soil Aggregates, Organic Carbon and Nitrogen in the Loess Plateau Area of China
	Hou Xianqing; Li Rong; Jia Zhikuan; Han Qingfang
来源期刊	Pedosphere
ISSN	1002-0160
出版年	2013
卷号	23 期号:4 页码:542-548
英文摘要	In rain-fed semi-arid agroecosystems, continuous conventional tillage can cause serious problems in soil quality and crop production,whereas rotational tillage (no-tillage and subsoiling) could decrease soil bulk density, and increase soil aggregates and organic carbon in the 0-40 cm soil layer. A 3-year field study was conducted to determine the effect of tillage practices on soil organic carbon (SOC),total nitrogen (TN), water-stable aggregate size distribution and aggregate C and N sequestration from 0 to 40 cm soil in semi-arid areas of southern Ningxia. Three tillage treatments were tested: no-tillage in year 1, subsoiling in year 2, and no-tillage in year 3 (NT-ST-NT); subsoiling in year 1, no-tillage in year 2, and subsoiling in year 3 (ST-NT-ST); and conventional tillage over years 1-3 (CT). Mean values of soil bulk density in 0-40 cm under NT-ST-NT and ST-NT-ST were significantly decreased by 3.3% and 6.5%, respectively, compared with CT, while soil total porosity was greatly improved. Rotational tillage increased SOC, TN, and water-stable aggregates in the 0-40 cm soil, with the greatest effect under ST-NT-ST. In 0-20 and 20-40 cm soils, the tillage effect was confined to the 2-0.25 mm size fraction of soil aggregates, and rotational tillage treatments obtained significantly higher SOC and TN contents than conventional tillage. No significant differences were detected in SOC and TN contents in the > 2 mm and < 0.25 mm aggregates among all treatments. In conclusion, rotational tillage practices could significantly increase SOC and TN levels, due to a fundamental change in soil structure, and maintain agroecosystem sustainability in the Loess Plateau area of China.
英文关键词	semi-arid region SOC sorage soil bulk density tillage practice water-stable aggregates
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Agriculture
CSCD记录号	CSCD:4898511
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335210
作者单位	Hou Xianqing, Chinese Institute of Water-Saving Agriculture, Northwest A&F University, Key Laboratory of Crop Physi-Ecology and Tillage Science in Northwestern Loess Plateau, Ministry of Agriculture, Yangling, Shanxi 712100, China.; Li Rong, Chinese Institute of Water-Saving Agriculture, Northwest A&F University, Key Laboratory of Crop Physi-Ecology and Tillage Science in Northwestern Loess Plateau, Ministry of Agriculture, Yangling, Shanxi 712100, China.; Jia Zhikuan, Chinese Institute of Water-Saving Agriculture, Northwest A&F University, Key Laboratory of Crop Physi-Ecology and Tillage Science in Northwestern Loess Plateau, Ministry of Agriculture, Yangling, Shanxi 712100, China.; Han Qingfang, Chinese Institute of Water-Saving Agriculture, Northwest A&F University, Key Laboratory of Crop Physi-Ecology and Tillage Science in Northwestern Loess Plateau, Ministry of Agriculture, Yangling, Shanxi 712100, China.
推荐引用方式 GB/T 7714	Hou Xianqing,Li Rong,Jia Zhikuan,et al. Effect of Rotational Tillage on Soil Aggregates, Organic Carbon and Nitrogen in the Loess Plateau Area of China[J],2013,23(4):542-548.
APA	Hou Xianqing,Li Rong,Jia Zhikuan,&Han Qingfang.(2013).Effect of Rotational Tillage on Soil Aggregates, Organic Carbon and Nitrogen in the Loess Plateau Area of China.Pedosphere,23(4),542-548.
MLA	Hou Xianqing,et al."Effect of Rotational Tillage on Soil Aggregates, Organic Carbon and Nitrogen in the Loess Plateau Area of China".Pedosphere 23.4(2013):542-548.