Effects of earthworm (Metaphire guillelmi) density on soil macropore and soil water content in typical Anthrosol soil

doi:10.1016/j.agee.2021.107338

	Effects of earthworm (Metaphire guillelmi) density on soil macropore and soil water content in typical Anthrosol soil
	Ma, Li 1,3; Shao, Ming'an 2,3; Fan, Jun 2; Wang, Jiao 3; Li, Yanpei 2
刊名	AGRICULTURE ECOSYSTEMS & ENVIRONMENT
	2021-05-01
卷号	311 页码:6
关键词	Soil macropore Soil water content X-ray computed tomography Earthworm
ISSN号	0167-8809
DOI	10.1016/j.agee.2021.107338
通讯作者	Shao, Ming'an(shaoma@igsnrr.ac.cn)
英文摘要	The burrowing activities of earthworms can change the soil macropore structure in terrestrial ecosystems. Studying the burrows structure and their effects on soil water movement may be crucial for exploring earthworm ecological functions and improving water use efficiency in farmlands in semi-humid areas. It was an experiment taken to assess the impact of anecic earthworm Metaphire guillelmi on the characteristics of soil macropore and soil water content (SWC). Earthworms with different densities (0, 3 and 10 in. in each column) were introduced in soil columns (height 38 cm, diameter 23 cm) for 33 days. The macropore characteristics were determined by X-ray computed tomography (CT). Results showed that increasing earthworm density increased the macroporosity and macropore number. The macropore number in the high-density earthworm treatment (HDE) was 1.3 times larger than that in columns with low-density earthworm (LDE). The diameter of soil macropores ranged from 2.12 mm to 7.30 mm. The mean macroporosities in HDE and LDE treatments were 1.35 % and 0.61 %, respectively. The soil pore morphology (mean macropore circularity, branch, junction and connectivity) was also improved by earthworms. The high number of macropores (45.30/N) and connectivity (0.05 cm(-3)) were observed in the column with high density of earthworms. Earthworms improved the soil macropores and macroporosity. The SWC linearly decreased with increasing earthworm density. A significant difference (P < 0.05) of SWC was observed between columns with earthworm (LDE and HDE) and those without earthworm (CK), especially at the 10-30 cm soil depth. The burrows generally open to the soil surface and increased water vapour transfer channels, thus accelerated soil evaporation. In areas with uneven rainfall, high earthworm density could aggravate the risk of seasonal drought at the plough layer, which is an important threaten for crop growth and yield.
资助项目	National Natural Science Foundation of China[42007006] ; Natural Science Foundation of Shaanxi Province[2020JQ896]
WOS关键词	SMALL-SCALE OBSERVATION ; BURROWING ACTIVITIES ; ENDOGEIC EARTHWORMS ; CAMPONOTUS-JAPONICUS ; COMPUTED-TOMOGRAPHY ; SOLUTE MOVEMENT ; IMAGE-ANALYSIS ; INFILTRATION ; FLOW ; ABUNDANCE
WOS研究方向	Agriculture ; Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000620791400009
资助机构	National Natural Science Foundation of China ; Natural Science Foundation of Shaanxi Province
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/160507]
专题	中国科学院地理科学与资源研究所
通讯作者	Shao, Ming'an
作者单位	1.Baoji Univ Arts & Sci, Key Lab Disaster Monitoring & Mech Simulating Sha, Baoji 721013, Peoples R China 2.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Ma, Li,Shao, Ming'an,Fan, Jun,et al. Effects of earthworm (Metaphire guillelmi) density on soil macropore and soil water content in typical Anthrosol soil[J]. AGRICULTURE ECOSYSTEMS & ENVIRONMENT,2021,311:6.
APA	Ma, Li,Shao, Ming'an,Fan, Jun,Wang, Jiao,&Li, Yanpei.(2021).Effects of earthworm (Metaphire guillelmi) density on soil macropore and soil water content in typical Anthrosol soil.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,311,6.
MLA	Ma, Li,et al."Effects of earthworm (Metaphire guillelmi) density on soil macropore and soil water content in typical Anthrosol soil".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 311(2021):6.