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棉花学报  2011 

不同基因型棉花品种钾素利用及某些光合特性比较研究

DOI: 1002-7807(2011)02-0154-06, PP. 154-159

Keywords: 棉花,基因型,钾营养吸收利用,光合生产

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Abstract:

以Bt棉杂交种科棉6号、泗杂3号、苏杂3号和徐杂3号及其相应的轮回亲本渝棉1号、泗棉3号、苏棉9号和徐1594为材料,2007-2008年于扬州大学研究其对钾营养的利用,并比较其在施钾条件下的某些光合特性。结果表明8个不同基因型品种对钾的利用呈不同特点。科棉6号和泗杂3号有较高的单株吸钾量,且生殖器官中积累量和分配比例高,钾肥生理利用率和子棉生产效率都居于前2位;苏棉9号和徐1594吸钾量低,钾肥利用率、生理利用率和子棉生产效率居于后2位。其它4个品种由于单株吸钾量、生殖器官中钾积累量和分配比例的不一致,钾肥生理利用率和子棉生产效率介于上述2类之间。4个Bt棉杂交种的SPAD值、净同化率、气孔导度、生殖器官干物质积累量及分配比例都显著高于相应的轮回亲本,且气孔导度、净同化率与钾肥生理利用率、钾素子棉生产效率呈显著以上水平正相关。因此,具有较高的吸钾能力且生殖器官钾积累能力强是形成高钾利用效率品种的基本要求。

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