Abstract: [Objective] In order to find out the change law of dry matter accumulation and quality of machine harvesting cotton in Xinjiang under different planting patterns, this project aims to provide theoretical basis for field production in Xinjiang.[Method]Taking the Xinluzao 50 as the research object, this paper studied the leaf area index, dry matter accumulation and distribution, cotton quality and yield of three kinds of planting methods, (66+10) cm , (72+4) cm and (76+76) cm.[Result]The leaf area index of row spacing (66+10) cm was significantly higher than that of (72+4) cm, and the peak value was 0.19 higher than that of cm (72+4) cm, and the late growth stage decreased slowly.(76+76) cm plant growth pattern in the early stage of leaf area index was higher than that of (66+10) cm, but its growth in the latter part of the larger declined, and the peak value was lower than that of (66+10) cm.The accumulation of dry matter was a "slow-fast-slow" trend during the growth process, which showed that the Liuhudi (66+10) cm planting pattern was less than that of (72+4) cm, and the (66+10) cm planting pattern was less than that (76+76) cm.[Conclusion]From the growth and development of cotton to the formation of canopy structure, the photosynthetic characteristics to cotton fiber quality and machine-harvesting quality were compared and evaluated.The applicability of the three planting patterns to field production promotion was as follows: (76+76) cm > (66+10) cm > (72+4) cm.

摘要： [目的]研究不同种植模式下新疆机采棉干物质积累和品质的变化规律,为新疆棉花大田生产提供理论依据.[方法]以新疆机采棉新陆早50号为材料,研究行距(66+10) cm、(72+4) cm和(76+76) cm 三种种植方式,对机采棉叶面积指数、干物质积累与分配、棉花品质和产量的影响.[结果]行距 (66+10) cm的叶面积指数明显高于(72+4) cm,且峰值较(72+4) cm高0.19 cm,生育后期下降缓慢.(76+76) cm种植模式生育前期叶面积指数虽高于(66+10) cm,但其生育后期下降幅度较大,且峰值较(66+10) cm低0.28.干物质积累量均随生育进程的推移呈"慢-快-慢"变化趋势,六户地(66+10) cm种植模式小于(72+4) cm,133团(66+10) cm种植模式小于(76+76) cm.[结论]从棉花生长发育到所形成的冠层结构,具有的光合特性至棉纤维品质及机采质量综合比较评价,三种种植模式对大田生产推广的适宜度比较为:(76+76) cm>(66+10) cm>(72+4) cm.