施钾对长绒棉干物质积累和产量品质的影响

Effects of Potassium Fertilizer on Dry Matter Accumulation,Yield and Quality of Long-fibre Cotton

为了明确钾肥对新疆南疆地区长绒棉干物质积累以及对产量和品质的影响。在新疆阿瓦提县进行了大田试验。试验结果表明,各处理长绒棉1 hm2总干物质的积累动态都呈"S"型曲线,可用Logistic生长函数加以模拟,效果良好。K1、K2、K3、K4各处理总干物质积累速率最大时刻t分别为播种后的84、86、90和85 d。施钾对长绒棉增产效果明显,处理K2、K3分别比处理K0的1 hm2籽棉产量增加了517.9和435.3 kg,增幅达13.03%和10.96%;增产效果主要是通过增加单株铃数实现的。施钾可以改善长绒棉的纤维品质,其中,强度、马克隆、成熟度和可纺系数值均增加,而却对纤维长度、整齐度影响不大。

Awati county in Xinjiang conducted field experiments to reveal the effects of potassium fertilization on dry matter accumulation, yield and quality of long - fibre cotton in the south of Xinjiang. The experiment results demonstrated that the dynamic curve of dry matter accumulation of long- fibre cotton was＂S＇type. The accu - mulation rate of dry matter treated with K1, K2, K3, K4 was sowing time after 84,86,90, 85 d respectively.Polassium fertilization had significant effect on increasing yield of long - fibre cotton. The yield of cotton seeds treated with K2 and K3 were 517.9 kg and 435.3 kg per hectare more than that of Ko. The increase of boll number per plant brought into increase of total yield of cotton. Accordingly, potassium fertilization may improve fibre quality of long - fibre cotton, among which the intensity, Macrom, maturity and spinning coefficient value of cotton fibre were all increased. However, it had little influence on the length and umiformity of fibre.