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| DOI：10.13522/j.cnki.ggps.2017.12.005 |
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| The Effects of Mulching with Biodegradable Plastic Films on Soil Moisture and Thermodynamics as well as Maize Yield |
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LIU Rui, SUN Shijun, ZHANG Wangwang, CHEN Zhijun, ZHANG Xudong，ZHU Kunlun
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College of Water Conservancy, Shenyang Agricultural University, Shenyang 110866, China; Shandong Eco-Benign Plastics Technology Co.,Ltd， Ji’nan 250110， China
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| Abstract: |
| Three field experiments were conducted in a rain-fed maize field in northeast China, two of which were mulched by the biodegradable plastic film (M1) and the common plastic film (M2), and the other one was without mulch (CK). The results showed that soil temperature at depth of 5, 10, 15, 20 and 25 cm in M1 was higher than that in M2 and CK during seedling and jointing, while there was no significant difference in soil temperature during tasseling and maturing period among the three treatments. During the whole growth period, the capacity of the soil to store water under biodegradable plastic film was higher than that under the common plastic film. The CK had the poorest soil water storage in the top 60 cm, followed by M2. The emergence rate of maize under M1 reached 99%, higher than those under M2 and CK by 8.5% and 16.2%, respectively. The maize yield was the highest under M1, which was 6.8% and 35.2% higher than that with M2 and CK, respectively. These results provided reference for the future use of biodegradable film in large area to improve maize yield and water use efficiency. |
| Key words: oxo-biodegradable plastic film; soil temperature; soil moisture; maize yield; rain-fed agriculture |
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