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;探讨一年生陆地棉宿生栽培叶片和茎枝NPK、可溶性糖含量,为制订栽培措施提供理论依据。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、二年生宿生陆地棉叶片和茎枝NPK、可溶性糖含量进行测定分析。结果表明,各处理叶片NPK、可溶性糖平均含量分别为3.13%～3.50%、0.49%～0.67%、1.47%～1.78%、4.23%～5.48%,茎枝分别为0.56%～0.82%、0.21%～0.28%、1.14%～1.42%、0.95%～2.15%;不同宿生年限的植株叶片NPK含量无显著差异,多数品种一年生植株叶片可溶性糖含量显著高于宿生棉的;高产品种NPK含量适中,可溶性糖含量稍低,而低产品种N含量低,P/K、可溶性糖含量较高;随生育进程,叶片全氮含量出现由高到低、可溶性糖含量出现由低到高的动态变化趋势,而叶片P/K含量的变化趋势较平稳。宿生陆地棉与其一年生棉比较,植株叶片NPK含量无明显变化,但宿生栽培的中后期应增施N肥,促进营养生长,延缓衰老。
The perennial cultivation of annual cotton is very important for maintaining genetic male sterile lines, producing hybrid seeds, fixing heterosis and preserving special germ plasm meterial. The contents of NPK and soluble sugar in leaves and stems for perennial cultivation of annual upland cotton was researched to supply the theory of perennial cultivation technique. Random block design and orthogonal arrays were set up to investigate the contents of NPK and soluble sugar in functional leaves and stems 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. The results showed that the contents of NPK and soluble sugar in leaves for perennial cultivation of annual upland cotton in all treatment was 3.13%-3.50% , 0.49%-0.67% , 1.47%-1.78% , 4.23%-5.48% , the contents of them in stems was 0.56%-0.82% , 0.21%-0.28% , 1.14%-1.42%, 0.95%-2.15%; There were no significant differences between the contents of NPK in functional leaves of different perennial ages, the contents of soluble sugar in leaves for annual upland cotton of most varieties is very significantly higher than that of perennial cotton; The contents of NPK in leaves of high yield varieties was moderate and of soluble sugar was less than of low yield varieties, the contents of N in leaves of low yield varieties was less and of P/K, soluble sugar was high; The contents of total N in different month changed from higher in prophase to lower in anaphase, of soluble sugar from lower to higher, with growing process. And the contents of total P and soluble sugar changed stably. It indicates that there were no significant change on the contents of NPK in perennial ages, but nitrogen fertilizer was increased in mid-later growing period of perennial cultivation to improve nutritive growth and delay aging for plates.
出处
《中国农学通报》
CSCD
北大核心
2010年第7期72-77,共6页
Chinese Agricultural Science Bulletin
基金
国家科技支撑计划农林动植物育种工程项目协作子课题(2006BAD01A05-xz02)
关键词
陆地棉
宿生栽培
叶片
茎枝
NPK
可溶性糖
upland cotton
biennial cultivation
leaves
stems
NPK
soluble sugar
