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- Title
Effects of drip irrigation with plastic mulching on the net primary productivity, soil heterotrophic respiration, and net CO<sub>2</sub> exchange flux of cotton field ecosystem in Xinjiang, Northwest China.
- Authors
Li Zhi-Guo; Zhang Run-Hua; Lai Dong-Mei; Yan Zheng-Yue; Jiang Li; Tian Chang-yan
- Abstract
In April-October, 2009, a field experiment was conducted to study the effects of drip irrigation with plastic mulching (MD) on the net primary productivity (NPP), soil heterotrophic respiration (Rh), and net CO2 exchange flux (NEFCO2 ) of cotton field ecosystem in Xinjiang, taking the traditional flood irrigation with no mulching (NF) as the control. With the increasing time, the NPP, Rh, and NEFCO2 in treatments MD and NF all presented a trend of increasing first and decreased then. As compared with NF, MD increased the aboveground and below ground biomass and the NPP of cotton, and decreased the Rh. Over the whole growth period, the Rh in treatment MD (214 g C·m-2) was smaller than that in treatment NF (317 g C·m-2 ), but the NEFCO2 in treatment MD (1030 g C·m-2) was higher than that in treatment NF (649 g C·m-2). Treatment MD could fix the atmospheric CO2 approximately 479 g C·m-2 higher than treatment NF. Drip irrigation with plastic mulching could promote crop productivity while decreasing soil CO2 emission, being an important agricultural measure for the carbon sequestration and emission reduction of cropland ecosystems in arid area.
- Subjects
XINJIANG Uygur Zizhiqu (China); CHINA; EXPERIMENTAL agriculture; MICROIRRIGATION; MULCHING; SOIL management; BIOTIC communities
- Publication
Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao, 2012, Vol 23, Issue 4, p1018
- ISSN
1001-9332
- Publication type
Article