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Article

Responses of Soil Respiration and Organic Carbon to Straw Mulching and Ridge Tillage in Maize Field of a Triple Cropping System in the Hilly Region of Southwest China

1
Key Laboratory of Eco-Environments in Three Gorges Reservoir Region, Ministry of Education/Engineering Research Center of South Upland Agriculture, Ministry of Education/College of Agronomy and Biotechnology, Southwest University, Chongqing 400715, China
2
Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Environment, Ministry of Agriculture, Beijing 100081, China
3
Department of Agronomy, University of Agriculture, Faisalabad 38040, Punjab Pakistan
4
Gui Zhou Institute of Biological Technology, Gui Yang 550006, China
*
Authors to whom correspondence should be addressed.
Sustainability 2019, 11(11), 3068; https://doi.org/10.3390/su11113068
Received: 8 March 2019 / Revised: 28 May 2019 / Accepted: 28 May 2019 / Published: 30 May 2019
Soil disturbance by tillage practices promotes soil respiration which is a main source of carbon dioxide emission into the atmosphere. The present study was conducted to investigate the effect of different tillage practices on soil respiration and the carbon source/sink characteristics of maize farmland ecosystems in the wheat–maize–soybean cropping system. Six tillage treatments, namely, traditional tillage (T), ridge tillage (R), traditional tillage + straw mulching (TS), ridge tillage + straw mulching (RS), traditional tillage + straw mulching + decomposing inoculants (TSD), and ridge tillage + straw mulching + decomposing inoculants (RSD), were used to measure the soil respiration and its hydrothermal factors. The results showed that the intensity of soil respiration increased initially and decreased afterwards throughout the growth period of maize ranging from 1.011 to 5.575 μmol (m2·s)−1. The soil respiration rate under different treatments varied remarkably presenting a trend of RSD > TSD > TS > RS > T > R. Ridge tillage reduced the soil respiration rate of maize farmland while straw mulching improved it. Meanwhile, ridge tillage and straw mulching increased the soil temperature sensitivity index of soil respiration, but the addition of decomposing inoculants reduced this trend. The soil moisture response threshold under ridge tillage was lower, while the straw mulching was found to increase it, compared with the control. Moreover, there was a positive correlation between trapped soil fauna and soil respiration. Compared with the control, ridge tillage and straw mulching were beneficial to the carbon sink of the farmland ecosystem as shown by the maize field for the entire growing season. View Full-Text
Keywords: soil respiration; carbon balance; straw mulching; ridge tillage; maize; soil temperature; southwest region soil respiration; carbon balance; straw mulching; ridge tillage; maize; soil temperature; southwest region
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MDPI and ACS Style

Zhang, S.; Hussain, H.A.; Wang, L.; Hussain, S.; Li, B.; Zhou, H.; Luo, H.; Zhang, X.; Ma, Z.; Long, L.; Dai, Y. Responses of Soil Respiration and Organic Carbon to Straw Mulching and Ridge Tillage in Maize Field of a Triple Cropping System in the Hilly Region of Southwest China. Sustainability 2019, 11, 3068. https://doi.org/10.3390/su11113068

AMA Style

Zhang S, Hussain HA, Wang L, Hussain S, Li B, Zhou H, Luo H, Zhang X, Ma Z, Long L, Dai Y. Responses of Soil Respiration and Organic Carbon to Straw Mulching and Ridge Tillage in Maize Field of a Triple Cropping System in the Hilly Region of Southwest China. Sustainability. 2019; 11(11):3068. https://doi.org/10.3390/su11113068

Chicago/Turabian Style

Zhang, Sai, Hafiz A. Hussain, Longchang Wang, Saddam Hussain, Biao Li, Hangfei Zhou, Haixiu Luo, Xiaoyu Zhang, Zhonglian Ma, Ling Long, and Yisha Dai. 2019. "Responses of Soil Respiration and Organic Carbon to Straw Mulching and Ridge Tillage in Maize Field of a Triple Cropping System in the Hilly Region of Southwest China" Sustainability 11, no. 11: 3068. https://doi.org/10.3390/su11113068

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