| 摘要: |
| 棉花宿生栽培对于雄性不育系的多年生保持和杂交制种，固定杂种优势、加速杂种优势利用和保存种质资源具有重要意义。探讨陆地棉宿生栽培的产量构成因素及其对产量形成的影响，为陆地棉宿生栽培提供理论依据。采用随机区组设计，对三年生、二年生宿生陆地棉的产量构成因素及其对产量形成的影响进行比较研究。结果表明：与一年生棉比较，宿生棉单位面积总铃数明显增多，多数品种的单铃重无明显变化，衣分变化因品种而异。三年生和二年生各因素对产量影响的趋势一致，总铃数影响最大，衣分影响次之，两者主要是直接影响；单铃重通过总铃数的间接影响较大。一年生各因素对产量影响略有不同。宿生栽培的总铃数明显增多，是增产的主要原因，同时应选择衣分高、受宿生年限影响小的品种。 |
| 关键词: 陆地棉 宿生栽培 产量构成因素 通径分析 广西南部 |
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| Study on the yield factors and path analyses for perennial cultivation of upland cotton in Southern Guangxi |
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CHEN GuoPing1，2， ZHANG Xin1， ZHOU RuiYang1*， ZHAO HongTao1
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1.College of Agriculture， Guangxi University， Nanning 530005， China;2.2.Guangxi Citrus Research Institute， Guilin 541004， China
1.College of Agriculture， Guangxi University， Nanning 530005， China； 2.Guangxi Citrus Research Institute， Guilin 541004， China
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| Abstract: |
| The perennial cultivation of upland cotton is very important for maintaining genic male sterile lines，producing hybrid seeds，fixing heterosis and preserving special germplasm. The yield factors and path analyses of perennial cultivation of annual upland cotton was researched to supply the theory of perennial cultivation. Random block design and orthogonal arrays were set up to investigate the yield factors and path analyses of triennial and biennial cultivation of annual upland cotton among 4 varieties of upland cotton，with biennial cultivation as contrast，in Nanning Guangxi from 2005 to 2007.Compared with annual cotton，the total bolls per plant were increased obviously. The single boll weights had no significant difference for most varieties. Lint percentage changes with varieties. The trend of yield factors influencing yield for triennial cotton was in accord with biennial cotton.The influence of total bolls was first，lint percentage was second,and the both are principally direct influence. The indirect influence overpass total bolls was bigger. Compared with triennial and biennial cotton，these factors presented only a little difference in influencing the yield of annual cotton. It indicated that the total bolls per plant for perennial cultivation were increased. Obviously，perennial cultivation was principal reason of increasing production，at a time varieties would be selected to be high of lint percentage,to be influenced a little by perennial ages. |
| Key words: upland cotton biennial cultivation yield factors path analyses South of Guangxi |
