Straw coverage alleviates seasonal variability of the topsoil microbial biomass and activity

被引：158

作者：

Lou, Yilai ^{[1
,2
]}

Liang, Wenju ^{[1
]}

Xu, Minggang ^{[2
]}

He, Xinhua ^{[3
]}

Wang, Yidong ^{[4
]}

Zhao, Kai ^{[5
]}

机构：

[1] Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Peoples R China

[2] Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Beijing 100081, Peoples R China

[3] Edith Cowan Univ, Sch Nat Resources, State Ctr Excellence Ecohydrol, Ctr Ecosyst Management, Joondalup, WA 6027, Australia

[4] Tianjin Normal Univ, Tianjin Key Lab Water Resources & Environm, Tianjin 300387, Peoples R China

[5] Chaoyang Ctr Agr Technol Serv, Chaoyang 100049, Peoples R China

来源：

CATENA | 2011年 / 86卷 / 02期

关键词：

Basal respiration; Straw coverage; Residue management; Seasonal variability; Soil microbial biomass; SOIL QUALITY; TILLAGE; MULCH; TEMPERATURE;

D O I：

10.1016/j.catena.2011.03.006

中图分类号：

P [天文学、地球科学];

学科分类号：

070403 [天体物理学];

摘要：

Straw coverage on soil surface is a well-known practice for conserving soil and water. Seasonal variability of microbial biomass carbon (MBC) and basal respiration (BR) in surface soil (0-5 cm) was compared between conventional straw removal (SR) and straw coverage (SC) in a maize (Zea mays L.) field experiment, Northeast China. The straw coverage treatment significantly increased microbial energy, carbon and nutrient sources (soil C and N contents) and improved soil physical environment (moisture and porosity), and thus stimulated MBC and BR across the growth season of maize, as compared to the straw removal treatment. MBC and BR showed similar seasonal trends in soil temperature, with maximum values in summer. In both study years, the straw coverage treatment reduced seasonal variation of soil temperature, therefore it significantly moderated seasonal variability of MBC and BR. Our results demonstrate that straw coverage contributes to stabilizing soil microbial characteristics in season. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：117 / 120

页数：4

共 28 条

[1]

Effect of tillage treatments on soil thermal conductivity for some Jordanian clay loam and loam soils [J].