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《Shandong Agricultural Sciences》 2009-11
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Interaction Effects of Plant Density with Retention of Vegetative Branch on Yield and Yield Components of Hybrid Cotton

LU He-quan,LI Zhen-huai,DONG He-zhong*,LI Wei-jiang,TANG Wei,ZHANG Dong-mei,LUO Zhen(Cotton Research Center,Shandong Academy of Agricultural Sciences/ Shandong Key Lab for Cotton Culture and Physiology,Jinan 250100,China)  
The hybrid cotton cultivar SCRC 25 was grown in Linqing,Jiaxiang and Jinxiang County of Shandong Province.The interaction effects of plant density(PD) with retention of vegetative branches(VB) on yield,yield components,earliness and economic index were studied by split-plot design in the year 2008.The results showed that significant interaction was found between plant density and plant pruning on cotton yield,yield components and maturity.The plants without VB produced less cotton at 3.00 and 7.50 plants per square meter,while produced more at 4.50~6.00 plants per square meter;but those with VB retention gave out the highest cotton yield at 3.00 plants per square meter and the lowest at 7.50 plants per square meter.Under VB removal condition,the yields of seed cotton and lint at 4.50 plants per square meter were 4.93% and 5.51% higher than those at 3.00 plants per square meter respectively.But under VB retention,the yield of seed cotton at 3.00 plants per square meter was 4.03% higher than that at 4.50 plants per square meter.At 3.00 plants per square meter,the boll number under VB retention was higher than that under VB removal,but at 4.50 plants per square meter or more,the results were reverse.Both VB retention and increasing plant density could decrease the boll weight.No significant interaction of plant density and plant pruning on ratio of seed cotton to stalk,but both them could significantly influence the biomass.They also had interaction effect on earliness.The earliness under VB removal was better than that under VB retention,and it decreased as the plant density rose.
【Fund】: 公益性行业(农业)科研专项(nyhyzx07-005-02);; 山东省重大应用技术研究项目(2009-棉花);; 现代农业产业技术体系建设专项资金资助
【CateGory Index】: S562.01
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