摘要
为探索长江流域棉区机采棉适宜的播期及合理的种植密度,以中棉425为材料,设置了2个播期(5月13日、5月25日)、4个密度(7.5、9.0、10.5、12.0株/m^2)共8个处理,研究了各处理间光合有效辐射(PAR)、产量及品质的差异。结果表明:棉花单铃重随着密度的增加逐渐降低,且随着播期推迟也有降低的趋势;衣分含量受密度的影响较小,但随播期的推迟下降较为明显;5月13日播种的10.5万株/hm^2的处理籽棉产量显著高于其他处理且其纤维品质较好。建议赣北棉区机采棉的适宜播期为5月13日左右,适宜密度为10.5万株/hm^2左右。
In order to explore the suitable seedtime and reasonable planting density of machine- harvested cotton in Yangtze River cotton area,we studied the differences of photosynthetically active radiation（PAR）,yield and quality in each treatment,eight treatments of the two seedtime（May13,May25）and4 density（7.5,9.0,10.5,12.0 plant/m2）,taking the cultivar CCRI425 as experimental material. The results showed that the boll weight gradually decreased with the increase of density,and the same trend with the delay of seedtime;the lint was less affected by the density,but decreased obviously with the delay of seedtime;thecottonyieldofthetreatmentwhichwassowedonMay13with105 thousandofplant/hm2 wassignifi cantly higher than other treatments and its fiber quality was also better. We recommended that the suitable seedtime of machine- harvested cotton in North Jiangxi cotton area was about May 13 and its reasonable planting density was about 105 thousand of plant/hm2.
出处
《棉花科学》
2016年第2期27-31,共5页
Cotton Sciences
基金
国家现代农业产业技术体系专项资金资助(CARS-18-36)
关键词
赣北棉区
机采棉
密度
播期
Machine-harvested cotton
Density
Seedtime
