For information in English, please click here
Effects of Sub-soil Plastic Film Mulching and Reducing Irrigation on Yield Formation and Water Use Efficiency of Winter Wheat
Abstract：Aim at the shortage of water resources, the low efficiency and high water consumption of Winter Wheat in North China Plain, the effects of Soil film mulching and reducing irrigation on the growth, material accumulation and distribution, yield composition and water use characteristics of winter wheat were studied through two-year field experiments. In this experiment, Jimai 22 was used as the experimental material, and four treatments were set up: conventional planting under open field (CK, 75 mm for jointing, heading and filling stage ), rain fed under open film(OFR, rain fed), water saving irrigation under plastic film (PFI, 75 mm for jointing) and rain fed under plastic film (OFR, rain fed). The results showed that the water consumption of wheat growth period was significantly reduced by sub-soil film mulch and reducing irrigation. Compared with conventional planting, the water consumption in the field reduced by 68.9~228.2mm. The condition of rain fed is easily affected by annual rainfall in dry years, the water consumption of rain fed treatments was only 43.3~54.6% of that of conventional planting, the number of effective ears also decreased by 44.3~44.6%, the yield reduced by 50.0~78.7%, and the water use efficiency was decreased by 8.3~50.9%. However, Water Saving irrigation under film mulch increased the number of effective ears and grains per ear, improved the dry matter accumulation and LAI before anthesis, and provided the material basis for grain growth after anthesis. the yield of two-year average was only 5.8% lower than that of the conventional planting, the water use efficiency increased by 14.3%. The comprehensive analysis shows that the sub-soil plastic film mulch and reducing irrigation can alleviate the water resources in the North China plain, and irrigation at the jointing stage of mulching is an effective cultivation measure that takes into account the grain yield and water saving efficiency..
Click to fold