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[1]YU Qingfeng,MIAO Qingfeng,SHI Haibin,et al.Effects of Straw Mulch Rates on Soil Temperature, Water Use and Yield of Spring Maize[J].Research of Soil and Water Conservation,2018,25(03):111-116.

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Effects of Straw Mulch Rates on Soil Temperature, Water Use and Yield of Spring Maize

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 25 Number of periods: 2018 03 Page number: 111-116 Column: Public date: 2018-04-10

Title:: Effects of Straw Mulch Rates on Soil Temperature, Water Use and Yield of Spring Maize

Author(s):: YU Qingfeng¹, MIAO Qingfeng², SHI Haibin², HU Min¹; 1. College of Vocational and Technical, Inner Mongolia Agricultural University, Baotou, Inner Mongolia 014109, China;
2. College of Water Conservancy and Civil Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China

Keywords:: straw mulch rate; water consumption; soil temperature; yield; water use efficiency; spring maize

CLC:: S152.7;S161

DOI:: -

Abstract:: In order to examine the applicability of straw mulch in spring maize growth process, five treatments including non mulch (CK), maize straw mulch rates:5 t/hm²(JF₁), 7.5 t/hm²(JF₂), 10 t/hm²(JF₃) and 12.5 t/hm²(JF₄) were used to compare the effects of different mulch rates on water consumption rule, soil temperature, yield and water use efficiency of spring maize. The results showed that the water consumption amounts of spring maize increased first and then decreased during the whole growth period, the soil evaporation between plants showed the opposite trend, and the peak value and minimum value of the whole growth period reached at the jointing stage and the silking stage, respectively; with the increase of straw mulch rates, the soil evaporation between plants showed the decreasing trend, and when the straw mulch rate reached up to 10 t/hm², the inhibition rate of soil water evaporation was weakened; straw mulch had the warming effect at low temperature, but had the obvious cooling effect at high temperature, and the average soil temperatures of JF₁, JF₂, JF₃ and JF₄ increased by 2.14℃, 4.23℃, 5.53℃ and 6.56℃ than CK, respectively, from the seedling stage to jointing stage, but reduced by 0.89℃, 1.70℃, 2.70℃ and 3.06℃, respectively, during the high temperature period from silking to grain filling, which kept the good soil temperature for the normal growth of maize; with the increase of straw mulch rates, the average daily variation of soil temperature showed the decreasing trend, and when the straw mulch rate reached to 10 t/hm², the change of soil temperature tended to be stable. Straw mulch significantly increased spring maize yield and water use efficiency, and when the mulch rate reached to 10 t/hm², the rise rate tended to be stable. The yield and water use efficiency of JF₃ increased by 24.89% and 39.42% than those of CK, respectively. Comprehensive analysis indicated that the straw mulch rate of 10 t/hm²was more suitable for spring maize growth in this area.

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