干旱区生态环境知识资源中心(Arid): Effects of ridge-furrow mulching on soil CO2 efflux in a maize field in the Chinese Loess Plateau

Arid

DOI	10.1016/j.agrformet.2018.10.009
	Effects of ridge-furrow mulching on soil CO2 efflux in a maize field in the Chinese Loess Plateau
	Li, Weiwei 1,2; Zhuang, Qianlai 2; Wu, Wei 1; Wen, Xiaoxia 1; Han, Juan 1; Liao, Yuncheng 1
通讯作者	Wu, Wei ; Liao, Yuncheng
来源期刊	AGRICULTURAL AND FOREST METEOROLOGY
ISSN	0168-1923
EISSN	1873-2240
出版年	2019
卷号	264 页码:200-212
英文摘要	Ridge-furrow mulching system (RFMS) is widely used in arid and semi-arid areas, but its effect on soil respiration (R-s) and its components, including heterotrophic (R-h) and autotrophic respiration (R-a) are still poorly understood. In this study, CO2 flux from the soil of furrows and ridges was measured across different RFMS practices (i.e., three different ridge/furrow ratios) and conventional flat planting (CK). A trenching method was used to estimate the contribution of R-h to R-s. Compared with CK, RFMS significantly increased soil temperature of the ridge, promoted soil moisture of the furrow, and enhanced microbial diversity at the early crop growth stage, resulting in increased R-s and its components. The ridge soils exhibited much higher R-s (3.43 mu mol s(-1)) than the furrow soils (2.98 mu mol m(-2) s(-1)) under all three RFMS practices. The contribution ratios of R-h to R-s across the different practices ranged from 50.4% to 59.6%. Soil temperature rather than soil moisture explained the seasonal variation of R-s and its components for both CK and RFMS. Nonetheless, high R-s and R-h values in RFMS did not induce a decline of soil organic carbon during the two-year experimental period. Improved root growth in RFMS practices may provide more exudates to the soil, thus offsetting soil carbon decomposition. Compared with CK, RFMS with ridge/furrow ratios of 40:70 cm, 55:55 cm, and 70:40 cm, significantly increased soil CO2 emissions by 10.6%, 19.6%, and 20.4%, respectively, while increasing maize yield by 26.1%, 36.4%, and 50.3%, respectively. Carbon emission efficiency (CEE) was significantly higher in RFMS than in CK in both years. This study suggests that, due to its high CEE, RFMS with a ridge/furrow ratio of 70:40 cm could be a highly promising strategy for sustaining crop productivity while minimizing environmental impacts.
英文关键词	Ridge-furrow mulching system Soil respiration Heterotrophic respiration Carbon emission efficiency Maize
类型	Article
语种	英语
国家	Peoples R China ; USA
收录类别	SCI-E
WOS记录号	WOS:000452931700017
WOS关键词	CARBON-DIOXIDE EFFLUX ; WATER-USE EFFICIENCY ; HETEROTROPHIC RESPIRATION ; CROP PRODUCTIVITY ; SEMIARID AREAS ; GREENHOUSE-GAS ; COTTON FIELD ; PHOTOSYNTHESIS ; EMISSIONS ; INCREASES
WOS类目	Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS研究方向	Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
来源机构	西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/213933
作者单位	1.Northwest A&F Univ, Coll Agron, Yangling 712100, Shaanxi, Peoples R China; 2.Purdue Univ, Dept Earth Atmospher & Planetary Sci, 550 Stadium Mall Dr, W Lafayette, IN 47907 USA
推荐引用方式 GB/T 7714	Li, Weiwei,Zhuang, Qianlai,Wu, Wei,et al. Effects of ridge-furrow mulching on soil CO2 efflux in a maize field in the Chinese Loess Plateau[J]. 西北农林科技大学,2019,264:200-212.
APA	Li, Weiwei,Zhuang, Qianlai,Wu, Wei,Wen, Xiaoxia,Han, Juan,&Liao, Yuncheng.(2019).Effects of ridge-furrow mulching on soil CO2 efflux in a maize field in the Chinese Loess Plateau.AGRICULTURAL AND FOREST METEOROLOGY,264,200-212.
MLA	Li, Weiwei,et al."Effects of ridge-furrow mulching on soil CO2 efflux in a maize field in the Chinese Loess Plateau".AGRICULTURAL AND FOREST METEOROLOGY 264(2019):200-212.