棉花蕾铃受害后的损害函数及补偿效应数学模型研究  

On Mathematical Pattern of Damaged Function and Its Compen-satlve Effect of Damaged Cotton Buds and Bolls

作　　者：陈付贵[1] 王清连[1] 

机构地区：[1]河南职业技术师范学院

出　　处：《棉花学报》1996年第2期104-108,共5页Cotton Science

摘　　要：试验采用五因素五水平二次正交旋转回归组合设计，建立了以皮棉产量、子棉产量、单株成铃及单株产量的目标函数，考虑种植密度、追氮量、果枝数、模拟被害蕾和被害幼铃五决策变量的数学模型。模型信息表明：低密度或高果枝数条件下棉花补偿能力衰减；受害铃达３个·株－１以上时，增加追氮量（大于１８０ｋｇ·ｈｍ－２）将会伤失棉花群体的补偿能力；被害蕾量的增加在一定范围内有增产作用；被害幼铃的多寡对产量的影响较大。模拟计算表明：百株允许被害蕾６０８～６４２个和允许被害幼铃１９６～２１４个，采取６．６９～６．７９５万株·ｈｍ－２的密度、留果枝数１４．７～１５．０２个·株－１和追氮量１５４．５～１６６．５ｋｇ·ｈｍ－２的农艺措施，可望获得皮棉１３５０ｋｇ·ｈｍ－２以上。最后提供了不同农艺措施下棉花的损害函数。This experiment based on the design of five-factor and five-level secondaryorthogonal regression is to make the target function of ginned cotton yield,unginned cot-ton yield,ball and singleplant yield,and take the density,nitrogen,branch ,simulateddamaged buds(first ten days of July)and simulated damaged young bolls(first ten days ofAug.)into consideration. It shows that young bolls the compensative ability of cotton de-clines at the low plant density or more fruiting branches;when the damaged bolls are morethan 3 per plant with the nitrogen more than 180 kg per ha,the compensative ability ofcotton colony will be lost.The simulated computation shows that under the threshold of608～642 allowable damaged buds per 100 plants and 196～214 allowable damadged youngbolls,the plant density could be as more as 66900～67950 per ha, 14.7～15. 02 fruitingbranches per plant and pure N 154.5～166.5kg kg per ha,a yield of 1350kg per ha will beobtained.

关 键 词：棉花 蕾铃受害 损害函数 补偿效应 数学模型 棉铃虫 

分 类 号：S562.05[农业科学—作物学] S435