| Effects of full plastic-film mulching with bunch planting on water consumption characteristics and grain yield of spring wheat in semi-arid region |
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| DOI：10.7606/j.issn.1000-7601.2019.02.22 |
| Key Words: whole field soil plastic mulching spring wheat water consumption characteristics water use efficiency yield |
| Author Name | Affiliation | | HOU Hui-zhi | Institute of Dry-land Agriculture, Gansu Academy of Agricultural Sciences/Key Laboratory of Northwest Drought-Resistant Crop Farming, Lanzhou, Gansu 730070, China | | ZHANG Xu-cheng | Institute of Dry-land Agriculture, Gansu Academy of Agricultural Sciences/Key Laboratory of Northwest Drought-Resistant Crop Farming, Lanzhou, Gansu 730070, China
Agronomy College, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | YIN Jia-de | Agronomy College, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | FANG Yan-jie | Institute of Dry-land Agriculture, Gansu Academy of Agricultural Sciences/Key Laboratory of Northwest Drought-Resistant Crop Farming, Lanzhou, Gansu 730070, China | | YU Xian-feng | Institute of Dry-land Agriculture, Gansu Academy of Agricultural Sciences/Key Laboratory of Northwest Drought-Resistant Crop Farming, Lanzhou, Gansu 730070, China | | WANG Hong-li | Institute of Dry-land Agriculture, Gansu Academy of Agricultural Sciences/Key Laboratory of Northwest Drought-Resistant Crop Farming, Lanzhou, Gansu 730070, China | | MA Yi-fan | Institute of Dry-land Agriculture, Gansu Academy of Agricultural Sciences/Key Laboratory of Northwest Drought-Resistant Crop Farming, Lanzhou, Gansu 730070, China |
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| Abstract: |
| The study on spring wheat water consumption and its effects on grain yield of spring wheat are helpful to understand the mechanism of grain yield increase of soil-plastic mulching technology in semiarid region of northwest Loess Plateau. This is also necessary to explore the technology, which could improve the water use efficiency and yield in the future. The spring wheat (Triticum aestivum, longchun 27) was selected as test material and a field experiment was conducted from 2012 to 2014 on northwest Loess Plateau (104°36′ E, 35°35′ N). The two treatments were: whole field soil with plastic mulching and bunching seeded (PMS), unmulched field and bunching seeded (CK). The seasonal soil water content, aboveground biomass, yield, and its components were measured; the periodical water consumption, water consumption modulus coefficient, water consumption rate, plant growth rate, water consumption efficiency and grain water use efficiency (WUE) had been calculated. The soil water storage in 0~300 cm profile of PMS was higher than that in CK, increased by 15.6~34.1 mm in seedling stage, 20.7~22.1 mm in jointing stage and 15.1~42.1 mm in filling stage from 2012 to 2014. From sowing to jointing stages, the water consumption modulus coefficient and water consumption intensity of PMS were higher than that with CK by 16.9%, 10.5%, and 20.0%, 5.8%, from filling to maturity, it was lower than that with CK by 28.2%, 10.6%， and 26.3%, 14.4% in 2013 and 2014, respectively. The growth rate was increased by 87.0%~153.7%, 42.8%~366.1%, 87.4%~133.0% and the water consumption efficiency were increased by 73.3%~200.2%, 93.8%~288.2%, 77.1%~155.5%, respectively. The plant height, plant weight, spike lets, grain number, grain weight per spike, 1000-grain weight of PMS were significantly higher than that with CK, resulted in the increment of 35.4%~61.9% for grain yield, and 44.6%~63.3% for the water use efficiency without significantly increase in evapotranspiration. Consequently, soil-plastic mulching and bunching seeding regulated water consumption process and characteristics of spring wheat in different precipitation years significantly, increased aboveground biomass growth rate and water consumption efficiency, resulted in the significant improvement in grain yield and WUE, where without remarkable increase in evapotranspiration in whole growth season. |
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