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Effects of mulching patterns on soil water, broomcorn millet growth, photosynthetic characteristics and yield in the dryland of Loess Plateau in China.

SU Wang1, ZHANG Yan-ping1, QU Yang2, LI Cui1, MIAO Jia-yuan1, GAO Xiao-li1, LIU Jian-hua3, FENG Bai-li1   

  1. (1State Key Laboratory of Crop Stress Biology for Arid Areas/College of Agronomy, Northwest A&F University, Yangling 712100, Shaanxi, China; 2Baoji Research Institute of Agricultural Science, Qishan 722400, Shaanxi, China; 3Hengshan Agricultural Technology Extension Center, Hengshan 719100, Shaanxi, China)
  • Online:2014-11-18 Published:2014-11-18

Abstract: The objective of this study was to explore the effects of mulching patterns on soil water, growth, photosynthetic characteristics, grain yield and water use efficiency (WUE) of broomcorn millet in the dryland of Loess Plateau in China. In a threeyear field experiment from 2011 to 2013, we compared four different mulching patterns with traditional plat planting (no mulching) as the control (CK). The mulching patterns included W ridge covered with common plastic film + intredune covered with straw (SG), common ridge covered with common plastic film + intredune covered with straw (LM), double ridges covered with common plastic film + intredune covered with straw (QM), and the traditional plat planting covered with straw (JG). The results showed that the soil water storage in 0-100 cm layer was significantly higher in all mulching patterns than in CK, particularly in SG then followed by LM, QM and JG, and the differences among the mulching patterns reached a significant level at the different growth stages of broomcorn millet. Among all mulching patterns, SG had the greatest effect on the growth and photosynthesis of broomcorn millet, respectively increasing the yield and WUE by 55.9% and 64.9% over CK, and the differences among the mulching patterns also reached a  significant level. Therefore, SG was recommended as an efficient planting pattern for broomcorn millet production in the dryland of Loess Plateau in China.