A study on the changeable law of the yield and quality characters of perennial upland cotton in southern guangxi | 广西南部宿生陆地棉产量和品质性状变化规律

صينى. 【目的】探讨一年生陆地棉在多年生栽培条件下的产量和品质变化规律,为陆地棉宿生栽培提供理论依据。【方法】采用随机区组设计,以4个陆地棉品种为供试材料,以一年生为对照,对三年生、二年生宿生陆地棉的产量品质性状进行比较研究。【结果】宿生棉的产量比一年生棉显著提高,4个品种三年生和二年生的平均产量分别为1 391.75和1 491.37 kg?hm-2,比其一年生的分别增产39.98%和50.00%,其中高产品种中928F1三年生和二年生的产量分别为1 781.67和1 882.94 kg?hm-2,比其一年生的分别增产53.95%和62.71%;宿生年限对产量无显著影响。宿生棉的纤维品质性状与一年生棉相比基本不变,宿生年限对纤维长度、比强度、马克隆值、公制支数无显著影响。【结论】陆地棉经宿生栽培产量显著提高,纤维品质性状基本不变;宿生陆地棉可直接应用于生产,应用前景好;宿生栽培应选择高产的抗虫杂交棉品种。

إنجليزي. 【Objective】 The perennial cultivation of annual cotton is very important for maintaining genic male sterile lines, producing hybrid seeds, fixing heterosis and preserving special germ plasm. The changeable law of the yield and quality characters of perennial cultivation of annual upland cotton was researched to supply a theoretical evidence of perennial cultivation. 【Method】 Random block design and orthogonal arrays were set up to investigate the yield and quality characters of triennial and biennial cultivation of annual upland cotton among 4 varieties of upland cotton, with annual cultivation as contrast,in Nanning, Guangxi from 2005 to 2007.【Result】 The yield of perennial cultivation was very significantly higher than that of annual cotton, the average lint yield of 4 varieties of the triennial and biennial cotton were 1 391.75 and 1 491.37 kg?hm-2, increased by 39.98% and 50.00% compared with that of the annual cotton. The lint yield of the triennial and biennial cotton of the high yield variety Zhong 928 F1 reached 1 781.67 and 1 882.94 kg?hm-2, increased by 53.95% and 62.71% compared with that of the annual cotton. There were no significant effects of the perennial ages on the yield. The fibre quality of the perennial cultivation had no obvious difference with that of the annual cotton. There were no significant effects of the perennial ages on the 2.5% span length,strength, micronaire, and metric number. 【Conlusion】 The result indicates that the yield of perennial cultivating was very significantly higher than that of annual cotton,the fibre quality of the perennial cultivation had no obvious difference with that of the annual cotton,the perennial cultivation may be directly used for production with finer prospect. The insect-resistant hybrid cotton cultivars with high yield should be selected for perennial cultivation.