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Effects of Plastic Film Mulching of Millet on Soil Moisture and Temperature in Semi-Arid Areas in South Ningxia of China

引用

Agricultural Sciences in China 2005年第11期4卷 865-871页

作者： LIAO Yun-cheng ZHANG De-qi JIA Zhi-kuan ZHANG Li LU Yang-ming College of Agronomy Northwest A＆F University Yangling 712100 P.R. China

The effects of film mulching of millet on soil water content were studied in semi-arid areas in the Loess Plateau of South Ningxia, China. Different mulching methods including water micro-collecting farming （WF）, water micro-collecting farming in winter fallow （WW）, hole seeding on film （HF）, hole seeding on film in winter fallow （HW） were compared to determine the effects of mulching methods on soil water collecting and conservation during millet growth periods of 2003-2004, as well as the variation tendency of water content after rainfall, output of millet and water use efficiency （WUE）. The experimental results in the two successive years indicated that water micro-collecting farming had a better function of collecting water after rainfall, and side infiltrated water was stored under the ridges and the top layer 0-40 cm soil water changes were great. WF had obvious role in water collection and preservation of soil moisture. It effectively improved the water supply capacity by about 19.05% in the end of growth seasons. The storage of HW and WW increased by 24.9 and 7.1 mm compared with CK, and output of yield were obviously increased. Film mulching increased the yield of millet and enhanced water use efficiency （WUE）. During different growth periods, WF exhibited better water storage function with lower water consumption, and demonstrated optimal social and ecological benefits.

关键词： Millet Dynamic change of soil moisture Film mulching water micro-collecting farming

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