【摘要】 比较五种不同种植方式棉花的干物质积累的全过程,发现早育套栽和麦后移栽的处理间差异不大,初花前的积累量占总干物质积累量的15.15～19.24%,初花后占80.76～84.85%。但早育套栽的早棉花,其前期(初花前)积累量反而略低于迟播栽的积累量,后期(盛花后)则远远高于迟播栽的棉花。生殖器官所占的干物质比率也高于迟棉花,所以早棉花的总积累量高,经济产量系数也较高,这是早播棉花的生理基础。五种不同种植方式棉花的干物质总积累量与温度、日照和雨量均呈显著的正相关,但从开花到吐絮的积累量与雨量呈负相关,就三个气候因素与干物质积累的相关程度而言,主要是温度和日照,其次是雨量。这三个气候因素对干物质积累的影响时期,主要在开花到吐絮。更多还原

【Abstract】 The dry matter accumulation and distribution were compared in fivedifferent planting patterns of cotton in 1981.There was little differencein the ratio of dry matter accumulation between early transplanting se-edlings in the proceeding crop rows and transplanting after harvestingwheat.In both treatments,the dry matter accumulation during pre-andpost-early bloom was proportioned respectively to 15.15～19.24% and 80.76～84.85% of the total. During early-blooming,the amount of dry matteraccumulation of early growing cotton(either early-or delay-transplanti-ng)was lower than that of the delay-sowing.But after peak-blooming,the former was greater than the latter,and also the fruiting organs ofthe plants of early growing treatments got higher dry weight than thedelay-sowing ones.Therefore the dry matter production was higher andeconomic yield ratio was greater in early planting cotton.That is thephysiological basis for the early cotton to get higher yield stably.There were positive correlations between dry matter productions andsunlight,temperature or rainfall respectively.But the most importantfactors influencing the dry matter accumulation were sunlight and tem-perature,and rainfall next.And the period during which these threeclimatic factors gave their effects most on the accumulation of dry mat-ter mainly was from blooming to opening bolls.更多还原