Characteristics of Soil Respiration and Soil Organic Carbon in Fava Bean Farmland Under Ridge Tillage and Straw Mulching in Southwest China

• Published in: Huanjing kexue Vol. 38; no. 5; p. 2102
• Main Authors: Xiong, Ying, Wang, Long-Chang, Du, Juan, Zhao, Lin-Lu, Zhou, Quan, Zhang, Sai
• Format: Journal Article
• Language: Chinese
• Published: China 08.05.2017
• Subjects: Agriculture; Carbon - chemistry; China; Farms; Soil - chemistry; Triticum; Vicia faba; soil respiration; soil organic carbon; ridge tillage; fava bean farmland; straw mulching
• ISSN: 0250-3301
• DOI: 10.13227/j.hjkx.201611046

Soil respiration is an important process for carbon emission. A field study was conducted with four treatments including T (traditional tillage+straw mulching level 0 kg·hm ), R (ridge tillage+straw mulching level 0 kg·hm ), RS1 (ridge tillage+straw mulching level 3750 kg·hm ), and RS2 (ridge tillage+straw mulching level 7500 kg·hm ), so as to probe the effects of ridge tillage and straw mulching amount on soil respiration and soil organic carbon(SOC) and the relationships of soil respiration rate with soil temperature and water content (SWC) during the growth period of fava bean in the triple intercropping system of fava bean/maize/sweat pomato in dryland region of southwest China known as the purple hilly region. The changes of soil respiration rate were in accordance with crop growing, being firstly increased and then decreased during the whole growth period of fava bean, and there were significant differences in soil respiration rate among different treatments, which could be ranked as RS2[3.365 g·(m ·d)