Chinese Journal of Agrometeorology ›› 2016, Vol. 37 ›› Issue (06): 654-665.doi: 10.3969/j.issn.1000-6362.2016.06.005

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Effects of Straw-incorporation Combined with Plastic Mulching in Autumn on Spring Maize in Semi-arid Areas

ZHANG Zhe,SUN Zhan-xiang,ZHANG Yan-qing,ZHENG Jia-ming,HAO Wei-ping, FENG Chen ,SI Peng-fei   

  1. 1.Key Laboratory of Dryland Agriculture, Ministry of Agriculture, Beijing 100081, China;2.Tillage and Cultivation Research Institute, Liaoning Academy of Agricultural Sciences/Engineering Research Centre for Dryland and Water-Efficient Farming of Liaoning Province, Shenyang 110161;3.College of Land and Environment, Shenyang Agricultural University, Shenyang 110866
  • Received:2016-04-23 Online:2016-12-20 Published:2016-12-15

Abstract: To evaluate the influence of straw-incorporation combined with plastic mulching in Autumn on spring maize growth and water use efficiency (WUE), field experiments were conducted in the Fuxin agricultural environment and the farmland conservation scientific observation station in the period of 2013-2015. Three treatments were followed as: (1) straw-incorporation (S), (2) straw-incorporation combined with plastic mulching in Autumn (AM+S), in which the straw returned only in the fall of 2013, (3) nudation(CK). The real-time dynamics of soil moisture and temperature were measured by soil water-temperature data collector (EcH2O), and the growth differences of maize were analyzed among the treatments. The results showed that the accumulated soil temperature and volumetric moisture content within 0-50cm soil layer were significantly increased in AM+S treatment, the water consumption of spring maize increased, and water storage within 1 m soil layer before spring sowing in 2014 and 2015 year were increased 83.92mm and 92.68mm, respectively, compared with that in CK. In 2014, the WUE in AM+S treatment was significantly lower compared with that in CK and S treatment, the grain yield was no different among treatments. In 2015, AM+S treatment improved significantly the accumulation of dry matter and the yield of spring maize, in which the yield of spring maize, rainfall use efficiency and WUE of grain were 13560kg·ha-1, 58.52kg·ha-1·mm-1, and 47.09kg·ha-1·mm-1, and increased by 97.96 % and 62.83 %, 97.96 % and 62.83 %, 90.34 % and 65.58 %, respectively, compared with those in CK and S treatment. This study suggests that one-off straw-incorporation combined with plastic mulching in Autumn improved the following year yield of spring maize and WUE under drought condition of rainfed farmland, resolved the surplus phenomenon of the agricultural straw in semi-arid region.

Key words: Straw-incorporation;, Plastic mulching in Autumn, Water use efficiency, Yield, Biomass