| Response of biodegradable film water retention and warming to the maize grain yields in Hexi irrigation area |
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| DOI：10.7606/j.issn.1000-7601.2016.06.05 |
| Key Words: biodegradable plastic film maize water retention and warming yield economic sbenifits ecologicai benefits Hexi irrigation area |
| Author Name | Affiliation | | LI Qiang | College of Grassland Science, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | WANG Qi | College of Grassland Science, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | ZHANG En-he | Agronomy College, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | LIU Qing-lin | Agronomy College, Gansu Agricultural University, Lanzhou, Gansu 730070, China |
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| Abstract: |
| Through 2 years of field experiment, aimed at studying the effects of mulching materials (common plastic film mulching, biodegradable film mulching, straw film mulching and no mulching) on adjusting temperature moisture and maize grain yields. The results showed that the order of increasing soil temperature was common plastic film mulching＞biodegradable film mulching＞no mulching＞straw film mulching. Compared to no mulching, the hight of 2 years water storage for common plastic film mulching, biodegradable film mulching and straw film mulching were 24.7 mm, 19.9 mm and 13.1 mm respectively. Compared with no mulching, the increases of 2 years maize grain yield for common plastic film mulching, biodegradable film mulching and straw film mulching were 11.55%, 9.53% and 4.70%, respectively, while increases of WUE were 17.35%, 14.11% and 8
.22%, respectively, while increases of economic benefit were 11.81%, 8.60% and 5.05%. In conclusions, combining yields and water use, common plastic film was better than biodegradable film at increasing soil temperature and saving water. The biodegradable film was good for agro-ecosystems sustainable development and it should be extend in the future. |
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