| Property of biodegradable film degradation, water-retention and increasing soil temperature and its impact on maize growth and development process |
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| DOI：10.7606/j.issn.1000-7601.2016.01.20 |
| Key Words: biodegradable film full film mulching on double ridges and planting in catchment furrows soil temperature corn growth and development |
| Author Name | Affiliation | | WANG Shu-ying | Key Laboratory of High Water Use-efficiency in Arid Areas of Gansu Province, Dryland Agriculture Institute of Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | FAN Ting-lu | Key Laboratory of High Water Use-efficiency in Arid Areas of Gansu Province, Dryland Agriculture Institute of Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | LI Shang-zhong | Key Laboratory of High Water Use-efficiency in Arid Areas of Gansu Province, Dryland Agriculture Institute of Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | ZHANG Jian-jun | Key Laboratory of High Water Use-efficiency in Arid Areas of Gansu Province, Dryland Agriculture Institute of Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | ZHAO Gang | Key Laboratory of High Water Use-efficiency in Arid Areas of Gansu Province, Dryland Agriculture Institute of Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | WANG Lei | Key Laboratory of High Water Use-efficiency in Arid Areas of Gansu Province, Dryland Agriculture Institute of Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | DANG Yi | Key Laboratory of High Water Use-efficiency in Arid Areas of Gansu Province, Dryland Agriculture Institute of Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | JIANG Xiao-feng | Key Laboratory of High Water Use-efficiency in Arid Areas of Gansu Province, Dryland Agriculture Institute of Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China |
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| Abstract: |
| With the extensive use of plastic film to elevate soil temperature as well as soil moisture content in arid farmland in northern of China, pollution of residual plastic film has become the urgent ecological concerns. To mitigate the pollution of farmland plastic film and improve water use efficiency in rainfed areas, three years of filed experiments were conducted to study the property of biodegradable film degradation, and its effect on soil water-retention and temperature under the planting pattern of film mulching on double ridges and growing corn in furrows. The results showed that biodegradable film was observed to be decomposed about 30 days after mulching, and began to be rapidly decomposed after 40 days, with 82% of it degraded until 80～90 days. The partially mulched film on ridge was basically the same as common plastic film remaining intact after harvesting, but the partly landfilled in furrow was decomposed significantly. Water-retention of biodegradable film was 90.4%～95.4% of common plastic film. The average temperature in 0～25 cm soil of full biodegradable film mulching on double ridges and planting corn in furrows was increased by 1.91℃ in comparison with non-mulching, and was reduced by 0.85℃ in comparison with full plastic film mulching. Emerging date was advanced 5～9 days and whole growing period was shortened 11～12 days. Degradable mulch film had the effects of increasing soil temperature, moisture-keeping, and therefore will replace common film if lowering the production cost. |
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