绿色棕色和白色棉品系光合特性及产量性状比较研究.pdf

绿色、棕色和白色棉品系光合特性及产量性状比较研究 张海鹏。，周琴， 周桃华‘ (安徽农业大学农学院，合肥230036) 究了白色棉、棕色棉和绿色棉3个品系在光合特性及产量性状的差异。结果表明：白色棉叶绿素(a+b) 含量最高，棕色棉次之，绿色棉最低，其中棕色棉与白色棉叶绿素(a+b)含量较接近。与白色棉 相比，绿色棉和棕色棉叶面积系数的增长主要在棉花生育中前期，盛花期以后，叶面积系数下降较 快：叶比重在整个生育期相对较低。绿色棉和棕色棉的光合速率在盛花前期略高于白色棉，蒸腾速 率在蕾期略高于白色棉，盛花期明显低于白色棉，3个品种光合速率日变化有两个明显的峰值，第 午下降缓慢，恢复的时间短。产量性状比较，棕色棉和绿色棉分别较白色棉减产皮棉17．5％和29-3％， 差异显著；棕色棉较绿色棉增产16．7％，差异显著。与白色棉相比，绿色棉和棕色棉的单株成铃数 少、衣分低、铃重轻。 关键词：绿色棉；棕色棉；光合特性；产量 andYieldof onthe Characters ComparativeStudy Photosynthesis Lines Green，BrownandWhiteFiberCotton Zhou ZhouTao-hua· ZhangHm-peng， Qing， (Agricultural Agricultural College，Anhui Abstract：Huaizongzacotton)，Huailuza1(green·fiber the material l(brown—fiber cotton)，andparental zms-4 of three called materials．The thedifferencesthe 1(white—cotton)were experiment paperanalyzed coloredcottonlinesinthe characterand contrasthad content photosynthesisyield．The higherchlorophyll the cottonhadalittle thatof others．Green-fiber lower (a+b)than chlorophyllcontent(a+b)than area ofbrown·fibercoRonand brown-fiber tothecontrast，coloredcotton，leafindices cotton．Compared Green—fibercottonwent inthe theirleafareaindicesfellfaster up mainly earlygrowthstage，however afterthefullbloom andColoredCotton leaf inthewhole Was stage，