栽培因子对棉株不同座果点纤维品质影响的研究

Studies of the Effects of the Cultural Factors on the Fiber Quality of Different Fruiting Position in Cotton

采用二次回归组合的最优混合设计(311设计),探讨了栽培因子对棉株不同座果点纤维品质的影响,建立了三个栽培因子对纤维品质影响的回归模型,即纤维品质(Y)与播期(X1)、密度(X2)、施氮量(X3)的回归方程,并提出了获得优质的最佳模式,即播期为4月23日、密度为2.4万株·hm 2、施纯N330kg·hm 2。其中施氮量是影响纤维长度、比强度、黄度最显著的栽培因子;播期是影响麦克隆值最显著的栽培因子;密度是影响伸长率最显著的栽培因子。

By using nonLinear regression orthogonal combination design ( the optimum mix design),the effects of cultural factors on fiber quality of different fruiting nodes were analyzed, The regression model between cultivation factors and fiber quality was established. The regression model between fiber quality (Y), sowing date (X1), planting density (X2), N application rate (X3) was as below: Y=3.9295+0.21708X1+0.056394X20.3954X30.20319X21+0.27002X22+0.212949X230.27276X1X20.1787 X1X30.0508X2X3. The model that the best fiber quality can be obtained is sowing at April 23th, 24000 plants·hm2, dressing N 330kg·hm2 . N application rate is one of significant cultural factors that affects the fiber length and strength;Sowing time is a significant cultural factor that affects the micronaire;The density is a significant cultural factors that affects elongation rate.