土壤湿度对棉纤维伸长与纤维素积累的影响

花铃期土壤湿度对棉纤维伸长与纤维素积累的影响很大，土壤湿度保持３２８ｇ／ｋｇ或将土壤湿度由２４６ｇ／ｋｇ提高到３２８ｇ／ｋｇ，能促进纤维伸长，有利于前期纤维中可溶性糖的增加和后期纤维素的积累；土壤湿度由３２８ｇ／ｋｇ降到２４６ｇ／ｋｇ，抑制纤维伸长，土壤湿度１６４ｇ／ｋｇ，严重影响纤维伸长，可溶性糖含量低，纤维素积累量最少，纤维品质变劣。

Effect of Soil MoistureUpontheExtensionofFiber and AccumulationofCellulose in Cotton

During the cotton flowering and boll developing stages the extension offiber and accumulation of cellulose were greatly affected by soil moisture. When soilmoisture was maintained at 328 g/kg or increased from 24g/kg to 328 g/kg ,it wasfavourable to promote the extension of fiber and increase the amount of soluble sugarduring the early stage as well as to increase the accumulation of cellulose during the latestage of fiber development.On the contrary,when soil moisture was decreased from 328g/kg to 246g/kg ,the extension of fiber was depressed. When soil moisture dropped to164g/kg ,the extension of fiber was seriously affected;the amount of soluble sugar waslower;and the accumulation of cellulose was the lowest so that the quality of fiber be-comes very poor.