Application Effect of Membrane-free Cultivation Mode on Cotton Production under Machine-Picked Planting Mode in Southern Xinjiang

【Objective】 Under the machine-harvesting planting mode, to study the effect of membraneless replacement with membrane on the growth, growth and yield of cotton, and to provide a theoretical basis for high-yield cultivation of membraneless cotton. 【Method】 Using the selected new cotton line "Zhongmian 619" suitable for non-membrane cultivation as the test material, a random block arrangement test was used to set up a field contrast test with and without membrane to analyze the effect of the configuration with and without membrane on cotton The influence of growth period, leaf area index, light interception rate, dry matter accumulation and yield factors. 【Results】 The growth period of non-membrane cotton was postponed by 9 days, and the leaf area index and light interception rate decreased by 8% and 7.16％, respectively. The start and end periods of dry matter accumulation under non-membrane treatment were both later than that of membrane-free cotton, and dry matter accumulation The duration and maximum rate of cotton were 3d and 0.714g/d lower than that of cotton with membrane, but the growth characteristic value was higher than that of cotton with membrane at 14.893g; the number of fruit branches and bolls in the treatment without membrane was significantly reduced, and the yield of seed cotton and lint cotton was higher than that of cotton. Membrane treatment is 6.73％　and 7.79％ lower, the difference is not significant, and the change of lint score is not obvious. 【Conclusion】 Zhongmian 619 can completely plant cotton without mulching, and by optimizing cultivation measures, the loss of leaf area, biomass, light interception rate and yield of filmless cotton can be greatly reduced, and green cotton can be planted.