烯效唑浸种对谷子植株生长发育的效应

以晋谷21为试验材料,通过盆栽及根管栽培试验，研究了不同浓度烯效唑(15、30、60和120 mg L^-1)浸种处理对谷子地上和地下农艺性状的影响。结果表明，烯效唑浸种对谷子具有明显的控上促下作用，使谷子根系数量、根系活力、根干重、根系总长度及茎粗与分蘖均明显增加，株高明显降低；此外显著降低了前期谷子叶面积，但后期发生逆转，表现出控前促后的效果；还对开花后谷子植株的衰老具有明显的调节作用，可延长根系活力的缓降期，提高衰老期间根系和旗叶中SOD、POD活性，降低根系与旗叶中MDA含量。烯效唑浸种处理可显著增加谷子的成穗数和千粒重，最终显著增加产量，在本试验条件下以30 mg L^-1烯效唑浸种效果最佳。

Effect of Seed Soaking with Uniconazole on Growth and Development of Foxtail Millet Plant

The objective of this study was to investigate the influence and regulation effect of seed soaking with different uni-conazole concentrations (15, 30, 60, and 120 mg L~(-1)) on the growth of roots and relation between roots and shoots in foxtail millet cultivar Jingu 21 cultured in pot and soil column on the experimental farm of Shanxi Agricultural University. The main results were as follows: (1) Uniconazole treatment inhibited the growth of shoots and promoted the growth of roots simultaneously. The number, activity, dry weight and total length of roots increased obviously, so did the stern thickness and tillers, but the plant height decreased. (2) Uniconazole treatment decreased the leaf area at seedling stage, but promoted its leaf growth at booting stage. (3) Uniconazole treatment adjusted the senescent process of plant through prolonging the declining phase of root activity, improving the activities of SOD and POD, and reducing malondialdehyde (MDA) accumulation in root and flag leaf after anthesis to some extent. Through treating seed in 30 mg L-1 uniconazole, the activities roots in lower layer increased 34.95%, 43.64%, and 44.74% respectively at 10, 20, and 30 days after anthesis compared with control. (4) Uniconazole treatment increased the ears per pot, 1000-grain weight, and the yield obviously. In a conclusion, the seed soaking in unieonazole solution of 15-120 mg L~(-1) concen-trations could increase the foxtail millet yield obviously, and the treatment of 30 rag L~(-1) uniconazole had the best effect under the condition of this study.