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棉花学报 2008

北疆灌耕灰漠土施钾对棉花钾素营养生理和产量的影响

DOI: 1002-7807(2008)06-0436-06, PP. 436-441

刘冬梅,褚贵新,李俊华,刘瑜,王国栋,权晓燕,杨长江

Keywords: 灌耕灰漠土,钾肥,棉花,产量,叶绿体超微结构

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Abstract:

选择新疆北疆棉区具有代表性的灌耕灰漠土，采用透射电镜显微技术和常规分析方法，对棉花的钾素营养和钾肥肥效进行了研究。结果表明，施钾可提高棉花冠层功能叶的气孔导度，改善棉花生长中后期功能叶的叶绿体超微结构，使基粒片层数量多且排列整齐致密，而不施钾会导致棉花功能叶片叶绿体过早解体。施钾显著提高了棉花的含钾量，叶和铃壳中钾含量比对照分别增加了13.3%和6.3%。施钾可使果枝数增加11.8%，显著提高皮棉产量，但对纤维品质无明显作用。

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