Abstract:This research studied the cotton boll spatial distribution,the yield and fiber quality of upland cotton cultivars with different maturity,to provide theoretical basis for selecting suitable maturity cultivars in this area. A field experiment was conducted in Tarim Basin of south Xinjiang with the materials of different maturity cotton cultivars (early,medium and middle early maturity).The result showed that the boll abscission rate (BAR) of cotton cultivars was sequenced early,medium,and middle early maturity in descending order.For the three bolls ratio,the pre-summer bolls from high to low was the early,medium,middle early maturity,the summer bolls was the middle early,medium,early maturity,and the autumn bolls was medium,early,middle early maturity.The bolls per plant and single boll mass from higher to low were the medium,middle early,early maturity cultivars.The yield,fiber length and the break strength were the middle early,medium,early maturity.The micronaire value was the medium,middle early,early maturity.The middle early maturity cultivars were better than the others,with lower BAR,higher boll retention,better three bolls ratio and higher yield and fiber quality,and followed by the middle maturity cultivar.And the early maturity cultivars were not suit for the Tarim Basin.Combining with the experiment results and production practice,it could be concluded that,in the current planting condition,the middle early maturity cultivar is the most suitable cotton cultivars planting in Tarim Basin of south Xinjiang. |