【摘要】 在大田试验条件下,研究了钾素营养对上、下部位棉铃纤维品质性状的影响。试验选用2个品种,4个施钾量(K2O 0、60、180和300 kg/hm2)。结果表明:施钾提高了上、下部棉铃的纤维长度,增大了最终纤维麦克隆值,且随施钾量的增加,增幅呈加大趋势,但施钾对纤维长度达最大值的时间无影响;施钾提高了上、下部位棉铃纤维的最终零隔距比强度和3.2 mm隔距比强度,但在上、下部位棉铃间表现存在一定差异,下部棉铃纤维的最终零隔距比强度和3.2 mm隔距比强度均随施钾量的增加呈先增加后降低趋势,上部铃则随施钾量增加一直呈增大趋势;施钾还提高了上、下部棉铃纤维的最终成熟度,而且其增幅随施钾量的增加而增大,当施钾量为300 kg/hm2时,可显著增加上、下部位棉铃纤维的最终成熟度。更多还原

【Abstract】 Potassium(K) plays pivotal role on cotton production and fiber quality.Our present study focused on the effects of K on the quality of fiber.Two cotton varieties,Lu18(L18) and Zhongmian 41(ZH41),were used and four rates of K fertilizer were applied(K2O 0,60,180,300 kg/ha) under field condition.The results showed,K application can raise the fiber’s length in both parts of the plant,and increase the final micronaire.Moreover,with the increase of K application,the magnitude of the increase is getting larger,but it had no effect on the time for the fiber to get the longest length.The K application can raise the 0 mm and 3.2 mm gauge tenacity on both upper and lower positions.However,the behaviors for different positions were not constantly.In the lower part of the plant,gauge tenacity increase first,then decrease with the increase of K application,but in the upper position,it increased constantly.The application of K significantly enhance the fiber maturation and the magnitude at both positions of the plant,The application of K at 300 kg/ha could significantly increased the fiber maturation at both positions of the plant.更多还原