干旱区生态环境知识资源中心(Arid): Effects of different tillage and straw retention practices on soil aggregates and carbon and nitrogen sequestration in soils of the northwestern China

Arid

	Effects of different tillage and straw retention practices on soil aggregates and carbon and nitrogen sequestration in soils of the northwestern China
	Wu Jun; Stephen Yeboah; Cai Liqun; Zhang Renzhi; Qi Peng; Luo Zhuzhu; Li Lingling; Xie Junhong; Dong Bo
来源期刊	Journal of Arid Land
ISSN	1674-6767
出版年	2019
卷号	11 期号:4 页码:567-578
英文摘要	Soil tillage and straw retention in dryland areas may affect the soil aggregates and the distribution of total organic carbon. The aims of this study were to establish how different tillage and straw retention practices affect the soil aggregates and soil organic carbon (SOC) and total nitrogen (TN) contents in the aggregate fractions based on a long-term (approximately 15 years) field experiment in the semi-arid western Loess Plateau, northwestern China. The experiment included four soil treatments, i.e., conventional tillage with straw removed (T), conventional tillage with straw incorporated (TS), no tillage with straw removed (NT) and no tillage with straw retention (NTS), which were arranged in a complete randomized block design. The wet-sieving method was used to separate four size fractions of aggregates, namely, large macroaggregates (LA, >2000 mum), small macroaggregates (SA, 250-2000 mum), microaggregates (MA, 53-250 mum), and silt and clay (SC, <53 mum). Compared to the conventional tillage practices (including T and TS treatments), the percentages of the macroaggregate fractions (LA and SA) under the conservation tillage practices (including NT and NTS treatments) were increased by 41.2%-56.6%, with the NTS treatment having the greatest effect. For soil layers of 0-5, 5-10 and 10-30 cm, values of the mean weight diameter (MWD) under the TS and NTS treatments were 10.68%, 13.83% and 17.65%, respectively. They were 18.45%, 19.15% and 14.12% higher than those under the T treatment, respectively. The maximum contents of the aggregate-associated SOC and TN were detected in the SA fraction, with the greatest effect being observed for the NTS treatment. The SOC and TN contents were significantly higher under the NTS and TS treatments than under the T treatment. Also, the increases in SOC and TN levels were much higher in the straw-retention plots than in the straw-removed plots. The macroaggregates (including LA and SA fractions) were the major pools for SOC and TN, regardless of tillage practices, storing 3.25-6.81 g C/kg soil and 0.34-0.62 g N/kg soil. Based on the above results, we recommend the NTS treatment as the best option to boost soil aggregates and to reinforce carbon and nitrogen sequestration in soils in the semi-arid western Loess Plateau of northwestern China.
英文关键词	soil aggregates soil organic carbon total nitrogen straw management tillage practices Loess Plateau
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	Agriculture
CSCD记录号	CSCD:6569771
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/336172
作者单位	Wu Jun, College of Resources and Environmental Sciences, Gansu Agricultural University;;Gansu Agricultural University, ;;Gansu Provincial Key Lab of Arid land Crop Science, Lanzhou;;Lanzhou, ;; 730070;;730070.; Cai Liqun, College of Resources and Environmental Sciences, Gansu Agricultural University;;Gansu Agricultural University, ;;Gansu Provincial Key Lab of Arid land Crop Science, Lanzhou;;Lanzhou, ;; 730070;;730070.; Zhang Renzhi, College of Resources and Environmental Sciences, Gansu Agricultural University;;Gansu Agricultural University, ;;Gansu Provincial Key Lab of Arid land Crop Science, Lanzhou;;Lanzhou, ;; 730070;;730070.; Luo Zhuzhu, College of Resources and Environmental Sciences, Gansu Agricultural University;;Gansu Agricultural University, ;;Gansu Provincial Key Lab of Arid land Crop Science, Lanzhou;;Lanzhou, ;; 730070;;730070.; Stephen Yeboah, Crops Research Institute, Kumasi, 3785, Ghana.; Qi Peng, College of Resources and Environmental Sciences, Gansu Agricultural University, Lanzhou, G...
推荐引用方式 GB/T 7714	Wu Jun,Stephen Yeboah,Cai Liqun,et al. Effects of different tillage and straw retention practices on soil aggregates and carbon and nitrogen sequestration in soils of the northwestern China[J],2019,11(4):567-578.
APA	Wu Jun.,Stephen Yeboah.,Cai Liqun.,Zhang Renzhi.,Qi Peng.,...&Dong Bo.(2019).Effects of different tillage and straw retention practices on soil aggregates and carbon and nitrogen sequestration in soils of the northwestern China.Journal of Arid Land,11(4),567-578.
MLA	Wu Jun,et al."Effects of different tillage and straw retention practices on soil aggregates and carbon and nitrogen sequestration in soils of the northwestern China".Journal of Arid Land 11.4(2019):567-578.