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前几年在棉花地膜覆盖的研究中,多偏重于覆盖的增产效应,对纤维品质研究甚少,这恰恰又是当前棉花生产上急待解决的问题。为此,我们从1983—1985年连续三年选用陕1155棉花良种,在每亩密度4,500—5,00株的生育情况下,每年在吐絮期选择地膜棉和露地棉各280-360株对等数目,从两类棉株的相同节位各采10个正常吐絮铃,晒干称重,扎取皮棉,计算铃重和衣分,然后进行相对应的1一12果枝和1—3果节的棉纤维物理性能比较测定,已获得明确结果。三年共测单株1,940棵。一、地膜覆盖对棉花纤维品质的影响:纤维物理性能测定结果,地膜棉在细度5,800米/克左右、达到纺纱要求基础上,各果节强度、断裂长度和手指长度均优于露地棉,且各果枝上的三个果节数值基数高,又表现均匀相近。而露地棉数值低,数值变异也大。
A few years ago in the study of plastic film mulching, more emphasis on coverage of the yield-increasing effect on the fiber quality is very little, which is precisely the current cotton production urgent problem to be solved. For this reason, we selected Shaan 1155 cotton varieties for three consecutive years from 1983 to 1985, and selected 280-560 cotton plants and open-field cotton equivalent each year during the bolting period at the fertility level of 4,500-500 mu per mu The number of the same two classes of cotton plant from the same section 10 each picking normal tidy boll, dry weight, take the lint, calculate the boll weight and lint, and then the corresponding 1 to 12 fruiting branches and 1-3 fruit section The physical properties of cotton compared to the determination, have been given clear results. A total of 1,940 single trees were tested in three years. First, the impact of plastic film mulching on the quality of cotton fiber: Physical properties of the fiber measured results, mulberry cotton fineness of about 5,800 m / g, to meet the requirements of spinning, the knot section strength, length and length of the rupture are better than the open-field cotton , And the three fruit nodes on each branch of the numerical high base, but also showed similar performance. The low number of open cotton, numerical variation is also large.