Effects of No-tillage Combined with Reused Plastic Film Mulching on Maize Yield and Irrigation Water Productivity

• Main Authors: SU Yong-zhong, ZHANG Ke, LIU Ting-na, WANG Ting
• Format: Article
• Language: zho
• Published: Agro-Environmental Protection Institute, Ministry of Agriculture 2016-09-01
• Series: Journal of Agricultural Resources and Environment
• Subjects: recycle of plastic film， no tillage ， maize yield， irrigation water productivity， oasis farmland
• Online Access: http://www.aed.org.cn/nyzyyhjxb/html/2016/5/20160512.htm
• ISSN: 2095-6819; 2095-6819

A field experiment was conducted to determine the effects of reused plastic film mulching and no-tillage on maize yield and irriga-tion water productivity(IWP) in the marginal oasis in the middle of Hexi Corridor region of northwestern China. The aim is to provide an alternative tillage and cultivation pattern for reducing plastic film pollution, saving cost and increasing income, and improving resource use efficiency. The field experiment was carried out in three soils with different textures and fertility levels. Three treatments for each soil were set up:(1) conventional tillage,winter irrigation, and new plastic mulching cultivation(NM);(2) no tillage, less winter irrigation and reused plastic mulching cultivation (RM);(3) no tillage, less winter irrigation and reused plastic mulching combined with straw mulching (RMS). The results showed that the average daily soil temperature in the two reused plastic mulching treatment(RM and RMS) during maize sowing and elongation stage was lower 0.6~1.0℃(5 cm depth) and 0.5~0.8℃(15 cm depth) than that in the NM. This result suggested that no tillage and reused plastic mulching cultivation still had the effect of increasing soil temperature. Maize grain yield in the RM was reduced by 4.4%~10.6% compared with the conventional cultivation(NM), while the net income increased due to saving in plastic film and tillage ex-penses. There was no significant difference in maize grain yield between the RMS and NM treatment, but the net income in the RMS was in-creased by 12.5%~17.1% than that in the NM. Compared with the NM, the two reused plastic film mulching treatments (RM and RMS) decreased the volume of winter irrigation, but maize IWP increased. Soil texture and fertility level affected significantly maize nitrogen uptake and IWP. In the arid oases with the shortage of water resources, cultivation practices of conservation tillage with recycle of plastic film is an ideal option for saving cost and increasing income, and improving irrigation water productivity.