Improving soil aggregation, aggregate-associated C and N, and enzyme activities by green manure crops in the Loess Plateau of China

doi:10.1111/ejss.12843

	Improving soil aggregation, aggregate-associated C and N, and enzyme activities by green manure crops in the Loess Plateau of China
	Zhang Dabin 1; Yao Zhiyuan 1; Chen Jiao 1; Yao Pengwei 1; Zhao Na 2; He Wenxiang 1; Li Yangyang 3; Zhang Suiqi 3; Zhai Bingnian 1; Wang Zhaohui 1
刊名	EUROPEAN JOURNAL OF SOIL SCIENCE
	2019-07-24
页码	13
关键词	aggregate-associated N and OC China crop rotation enzyme activity legume residue loess soil long-term effect soil aggregation
ISSN号	1351-0754
DOI	10.1111/ejss.12843
通讯作者	Gao Yajun(yajungao@nwsuaf.edu.cn)
英文摘要	Green manure and fertilization practices have substantial impacts on soil chemical and biological properties over time. A field experiment was conducted on Cumulic Haplustoll to investigate the effects of leguminous green manure (LGM) crops and nitrogen (N) fertilizer on dry-stable soil aggregate distributions and stability, the concentrations of organic carbon (OC) and N in the bulk soil and separated aggregate fractions, and soil enzyme activities in dry croplands on the Loess Plateau of China. Species tested as LGM crops were Huai bean (Glycine ussuriensis Regel et Maack.), soybean (G. max (L.) Merr.) and mung bean (Phaseolus radiatus L.). Two rates of N fertilizer (0 and 162 kg N ha(-1)) applied to winter wheat sown after LGM was incorporated into surface soil. Results showed that the inclusion of LGM crops for 6 years significantly increased the total nitrogen (TN), soil organic carbon (SOC), aggregate-associated N and OC concentrations, enhanced the values of aggregate content with >0.25 mm size (R-0.25) and mean weight diameter (MWD), and boosted soil enzyme (invertase, urease, dehydrogenase and aryl-sulfatase) activities at the 0-20-cm depth compared to the bare fallow system under dryland conditions. The long-term application of N fertilizer substantially increased the proportion of macroaggregates (>5.0 mm), MWD and N contents in the 0.25-5-mm size aggregates, and promoted the relative activities of invertase, alkaline phosphatase, dehydrogenase and aryl-sulphatase, but decreased the urease activity. The correlations among macroaggregate fractions and soil chemical properties, aggregate stability and enzyme activities were significant and positive; however, the correlations between small aggregate fractions (<2 mm) and corresponding parameters were negative, or there were no correlations. Overall, combining green manuring practices with suitable N fertilizer application should be recommended to improve the soil quality in dryland regions similar to the Loess Plateau of China. Highlights Green manure crops significantly increased soil enzyme activities, SOC and total N contents. Green manure crops increased macroaggregate (>5 mm) formation and stability. Application of N fertilizer significantly increased the proportions and stability of macroaggregates. Green manure crops along with N fertilizer helped to build better soil quality in a dry loess cropland.
资助项目	National Natural Science Foundation of China[41401330] ; Special Fund for Agro-Scientific Research in the Public Interest[201503124] ; China Agricultural Research System[CARS-03-1-31] ; Fundamental Research Funds for the Central Universities[2452017042] ; Chinese National Natural Science Foundation[31801942] ; National Key Research and Development Program of China[2018YFD020040306] ; Key Project of National Science & Technology Support Plan[2015BAD22B01] ; Key Project of National Science & Technology Support Plan[2015BAD23B04]
WOS关键词	COVER CROPS ; ORGANIC-MATTER ; CARBON SEQUESTRATION ; MICROBIAL BIOMASS ; QUALITY ; MANAGEMENT ; NITROGEN ; FERTILIZATION ; CULTIVATION ; EFFICIENCY
WOS研究方向	Agriculture
语种	英语
出版者	WILEY
WOS记录号	WOS:000477126700001
资助机构	National Natural Science Foundation of China ; Special Fund for Agro-Scientific Research in the Public Interest ; China Agricultural Research System ; Fundamental Research Funds for the Central Universities ; Chinese National Natural Science Foundation ; National Key Research and Development Program of China ; Key Project of National Science & Technology Support Plan
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/58278]
专题	中国科学院地理科学与资源研究所
通讯作者	Gao Yajun
作者单位	1.Northwest A&F Univ, Coll Nat Resources & Environm, Yangling 712100, Shaanxi, Peoples R China 2.Bayannaoer Acad Agr & Anim Sci, Bayannaoer, Peoples R China 3.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling, Shaanxi, Peoples R China 4.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Beijing, Peoples R China 5.Minist Agr, Key Lab Plant Nutr & Agrienvironm Northwest China, Yangling, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Zhang Dabin,Yao Zhiyuan,Chen Jiao,et al. Improving soil aggregation, aggregate-associated C and N, and enzyme activities by green manure crops in the Loess Plateau of China[J]. EUROPEAN JOURNAL OF SOIL SCIENCE,2019:13.
APA	Zhang Dabin.,Yao Zhiyuan.,Chen Jiao.,Yao Pengwei.,Zhao Na.,...&Gao Yajun.(2019).Improving soil aggregation, aggregate-associated C and N, and enzyme activities by green manure crops in the Loess Plateau of China.EUROPEAN JOURNAL OF SOIL SCIENCE,13.
MLA	Zhang Dabin,et al."Improving soil aggregation, aggregate-associated C and N, and enzyme activities by green manure crops in the Loess Plateau of China".EUROPEAN JOURNAL OF SOIL SCIENCE (2019):13.