外源激素处理对甜菜农艺性状及产质量的影响

以甜菜丰产型品种“SD13829”和高糖型品种“04BS02”为材料,研究了喷施2,4-D、GA3、6-BA、ABA 4种外源激素对甜菜农艺性状及产质量的影响.结果表明,GA3能促进株高的增长,ABA抑制株高的增长和叶面积的扩大.2,4-D能促进叶面积的扩大.6-BA、2,4-D和GA3能不同程度地提高地上部干物质积累量.在甜菜生育后期喷施ABA明显抑制甜菜地上部生长,促进地下部干物质积累;喷施2,4-D会造成地下部干物质减少.在块根增长期喷施4种外源激素均能提高块根鲜重,但对两品种含糖率无影响.在糖分积累期喷施4种外源激素对单株根重无明显影响,喷施2,4-D降低了两品种的含糖率,喷施ABA提高了两品种的含糖率.

Effect of exogenous hormoneson on photosynthetic character and yield of sugar beet

With high yield type varieties ＂SD13829＂ and high sugar type varieties ＂04BS02＂ as the materials, analyzed four kinds of exogenous hormones on the influence of photosynthetic character and yield. The results showed that GA3 can promote the growth of plant height, ABA restrain the growth of plant height and leaf area expansion. 2,4 - D can promote the expansion of leaf area. 6 - BA, 2,4 - D and GA3 can improve the quality of aboveground dry matter accumulation in different degrees, spraying ABA significantly inhibit the growth of sugar beet above ground, promote accumulation of dry matter of underground part in the latter stage of growth, spraying 2,4 - D can lead to underground part of dry matter reduced. In root growth speriod praying four kinds of exoge- nous hormones could increase root fresh weight, but no effect on the sugar content of two varieties , the differ- ence was not significant. In sugar accumulation period, spraying four kinds of exogenous hormones had no effect root weight per plant, spraying 2,4 - D reduce the sugar content of two varieties, spraying ABA increased the sugar content of two varieties.