【摘要】 在大田条件下,以3.75万株.hm-2常规栽培去叶枝棉为对照,研究了2.25万株.hm-2简化栽培留叶枝棉的光合特性、生态特性及产量品质,结果表明:简化栽培的棉行间通风透光条件较差,霜前花率低,叶片非光化学猝灭系数NPQ和中下部叶片光合速率明显低,纤维比强度降低5.2%。但两种处理间的主茎叶绿素含量、PSⅡ潜在光化学活性Fv/Fo、实际光化学效率ФPSⅡ、气孔导度Cs、光化学猝灭系数qP和纤维长度、麦克隆值、整齐度、成熟度及产量没有明显差别。更多还原

【Abstract】 As compared with cotton-removing-leafy-shoot of conventional cultivation with 3.75×104 plants per hectare,the photosynthetic characteristics,the yield & quality of cotton-retaining-leafy-shoot of simplify cultivation with 2.25×104 plants per hectare was studied under field condition.The results showed that simplify-cultivation’s ventilation and transmitting light rate between the row were inferior,the yield percent before frost was lower, the photosynthetic efficiency of leaves in middle-below layer of canopy and non-photochemical quenching coefficient(NPQ)of main stem leaves reduced obviously;fibre strength was reduced by 5.2%.But the contents of chlorophyll,PSⅡ activity(FV/FO),actual photochemical efficiency of PSⅡ(ФPSⅡ),stomata conductance(Gs),photochemical quenching coefficient(qP)of main stem leaves,and cotton yield,and length,micronaire value,uniformity,maturity of cotton fibres were no obviously difference between the two treatments.更多还原