【摘要】 在大田条件下,采用中熟杂交棉标杂A1、经杂2号和早熟常规棉豫早06、中棉30品种,研究了盛铃期施钾对其光合特性及产量的影响.结果表明,盛铃期土壤施入氯化钾150 kg.hm-2,可提高棉花盛铃期至初絮期叶片SPAD值和Fv/Fm,Fv/Fo;加大叶片的E和C,提高叶片的Pn;棉花单株结铃数、铃重和衣分均有不同程度提高.施钾与不施钾相比,标杂A1、经杂2号、豫早06和中棉30皮棉产量分别提高2.0%,8.6%,13.0%和11.5%.更多还原

【Abstract】 The effects of applying potassium fertilizer at peak bolling stage of cotton on the photosynthesis characteristic and yield were studied under filed conditions with middle-season hybrid varieties Biaoza A1,Jingza 2 and short-season normal varieties Yuzao 06,Zhongmian 30.Results show that applying 150 kg·hm^-2 Potassium chloride at peak bolling stage increased SPAD value,maximal PSⅡ light energy transformation efficiency（Fv/Fm）,PSⅡ potential activity（Fv/Fo）,photosynthesis rate（Pn） in leaves of cotton during peak bolling stage to early bolls opening stage,enhanced total bolls per plant,boll weight and lint percentage.Compared with contrastive cotton plants,lint yield of Biaoza A1,Jingza 2,Yuzao 06,Zhongmian 30 in experiment were increased 2.0%,8.6%,13.0%,11.5% respectively.更多还原