| Soil moisture and economic benefits of maize field by 2 years plastic film mulching under different irrigation levels |
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| DOI：10.7606/j.issn.1000-7601.2017.03.01 |
| Key Words: maize 2 years plastic film mulch irrigation level water use efficiency ratio of input and output economic benefits |
| Author Name | Affiliation | | ZHAO Cai | Gansu Provincial Key Laboratory of Arid Land Crop Science, Faculty of Agronomy/Gansu Agricultural University, Lanzhou, Gansu 730070, China | | CHEN Gui-ping | Gansu Provincial Key Laboratory of Arid Land Crop Science, Faculty of Agronomy/Gansu Agricultural University, Lanzhou, Gansu 730070, China | | CHAI Qiang | Gansu Provincial Key Laboratory of Arid Land Crop Science, Faculty of Agronomy/Gansu Agricultural University, Lanzhou, Gansu 730070, China | | YIN Wen | Gansu Provincial Key Laboratory of Arid Land Crop Science, Faculty of Agronomy/Gansu Agricultural University, Lanzhou, Gansu 730070, China | | LIU Chang | Gansu Provincial Key Laboratory of Arid Land Crop Science, Faculty of Agronomy/Gansu Agricultural University, Lanzhou, Gansu 730070, China |
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| Abstract: |
| In order to provide the theory basis for optimal tillage measures, film mulching reuse and increasing water use efficiency of maize in oasis irrigation district, under different irrigation levels and minimal/no tillage with plastic film mulch, taking the maize field as the research object, the effect on soil water content and yield of maize by 2 years film mulching, no tillage in autumn and mulching in spring and traditional tillage plus mulching have been researched. The results showed that: before sowing the soil water content in 0 to 60 cm and soil water storage in 0 to 120 cm can be significantly increased by 2 years plastic film mulching treatment, compared with the traditional tillage plus mulch, the soil water storage can be increased 13.31%, also the difference between treatment was significant. In addition, the soil water content in 0 to 30 cm can be increased 7.67% during maize growing period, but the effect of different treatment to soil water content in 30 to 120 cm was less. Under high irrigation level, the crop yield by 2 years plastic film mulching can be reached same as the traditional tillage plus mulch, but it was high under middle and low irrigation level, the yields were increased 2.40% and 16.39% respectively. Also, the water use efficiency (WUE) was exsisted significant difference between each mulching treatment under low irrigation level, the WUE by 2 years film mulching was higher than 5.25% and 20.26% compared with no tillage in autumn and mulching in spring and traditional tillage plus mulching. In addition, the production cost by the mode of 2 years plastic film mulching can be significantly decreased, the input-output ratio was higher than 7.27% and 15.69% with no tillage in autumn and mulching in spring and traditional tillage plus mulching. This can be explained that: the soil water content in 0 to 30cm before seeding and during growth period can be significantly increased by the mode of 2 years plastic film mulching, under low irrigation level as water stress, the drought water stress can be moderated, increased crop grain yield, WUE and the ratio of input and output, decreased the production cost by the mode of 2 years plastic film mulching. So it was a new management technique for the oasis irrigation district in northwest region of China. |
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