【摘要】 以棉花品种新陆中54号为试材,采用裂区试验设计,主区为滴灌周期分别为7天1次(T1)和10天1次(T2),副区为3个滴灌频次:6次(D6)、7次(D7)、8次(D8),研究等行距机采棉最适宜非充分滴灌周期与频次。结果表明:同一滴灌频次下,生育进程随着滴灌周期的增加而明显延迟,真叶数和有效果枝数随着滴灌周期的增加而增加,株高和倒四叶宽随着滴灌周期的增加呈增加的趋势;同一滴灌周期下,真叶数和主茎节间长随着滴灌频次的增加而增加,株高和倒四叶宽随着滴灌频次的增加而略有降低;有效果枝、LAI、SPAD值、现蕾数、成铃数随着滴灌频次的增加呈先升后降的趋势,以D7处理较高,生长特征值较为协调;滴灌周期处理间,单铃重、皮棉产量及水利用效率差异不显著,但随着滴灌频次的增加其呈先增后降的趋势,以D7处理最高,分别比D6、D8平均增产12.7%、13.5%,水分利用效率分别提高了12.9%、13.7%。因此,在南疆阿克苏地区,等行距机采棉滴灌周期为10天1次条件下,滴灌频次为7次适宜。更多还原

【Abstract】 In order toexplore the irrigation effect on cotton variety,‘Xinluzhong54’for optimal insufficient drip irrigation period and frequency of row cotton picker machine,we used a split design with treatments T1( 7 days,1 times) and T2( 10 days,1 times) and sub regions with 3 drip irrigation frequency,D6( 6 times),D7( 7 times),D8( 8 times). The results showed that under the same irrigation frequency,the growth were significantly delayed with increasing irrigation period whilenumber of leaves and effective branches,plant height,and leaf width increased with increasingirrigation period. Under the same irrigation period,number of leaves and length of internodeincreasedbutplant height and leaf width slightly decreased with increasing irrigation frequency. LAI,SPAD,and number of effectivebranches,number of buds and bolls increased first followed by decrease with increasing drip irrigation frequency. The growth characteristics were more optimal and single bell weight,lint yield,and water use efficiency were not significantly different. As the irrigation frequency increased,the treatment D7 resulted in the highest increase in cotton yield more than12.7% and 13.5% than D6 and D8,respectively. The water use efficiency in D7 also increased by 12. 9% and 13. 7% than that in D6 and D8,respectively. Therefore,in the Akesu area of southern Xinjiang,the optimal frequency of drip irrigation is 7( Times) of the drip irrigation frequency and an irrigation period of 10 days,1 times.更多还原