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棉花窄行密植生产是缩短棉花生长季节实现棉花早熟的主要举措,并且窄行密植对棉花的产量无显著影响。田间试验于2006年6月到2007年1月在巴基斯坦费萨拉巴德农业大学试验田进行,以确定行距对不同品系棉花的生长、生产和早熟性指数的影响。试验选取NIAB-111,CIM-496和FH-901 3个棉花品种,设置了60、75和90 cm 3种行距进行试验研究。结果表明:行距对棉花生长发育、产量和早熟性指数具有极显著影响;行距75 cm的处理产量最高达到2603 kg·hm-2,其次是行距60 cm的处理,产量为2541 kg·hm-2,但二者间差异不显著;行距60 cm的处理早熟性指数达到50.92%,显著大于其它处理;行距75 cm的处理次之。子棉产量最高的品种是FH-901,同时其早熟性指数也最高,达到54.34%。
Narrow row cotton planting is to shorten the cotton growing season to achieve the main measure of cotton precocity, and narrow row close planting on cotton yield no significant impact. Field trials were conducted at the Experimental Farm at Faisalabad Agricultural University in Pakistan from June 2006 to January 2007 to determine the effect of spacing on the growth, production and precocity index of cotton from different strains. Three cotton varieties, NIAB-111, CIM-496 and FH-901, were selected for testing. The results showed that the row spacing had a very significant effect on the growth and development of cotton, the yield and the precocity index of cotton. The highest yield reached 2603 kg · hm-2 with the row spacing of 75 cm and the second row with the row spacing of 60 cm with the yield of 2541 kg · hm-2 , But the difference between them was not significant. The prematurity index of 60 cm row reached 50.92%, which was significantly greater than that of other treatments. The row spacing of 75 cm was the second. The highest cotton yield was FH-901, with the highest precocity index reaching 54.34%.