外源植物生长调节剂GGR浸种对小麦种子萌发和幼苗生长的影响

为筛选出植物生长调节剂GGR 6号在小麦播前种子处理上的最佳应用浓度，本试验以烟农19品种小麦为试验材料，采用水培与穴盘育苗相结合的试验方法，设置0、5、10、20、30、50、100 mg·L-1共计7个浸种处理，研究不同浓度GGR浸种对小麦种子萌发和幼苗生长的影响。结果表明，30 mg·L-1 GGR浸种处理下小麦种子的发芽率、发芽势、发芽指数和活力指数最高，分别较CK显著提高了12.09%、15.31%、31.55%和42.09%。小麦幼苗的株高以20 mg·L-1 GGR浸种处理最高，较CK显著提高了32.00%。小麦根长以50 mg·L-1 GGR浸种处理最高，较CK显著提高了10.26%。30 mg·L-1 GGR浸种处理下小麦种子的茎粗、叶长、根体积、苗鲜重、壮苗指数、叶绿素a、叶绿素b和类胡萝卜素含量分别比CK显著提高了45.19%、25.37%、68.18%、66.34%、35.53%、36.50%、146.88%和131.03%。综合隶属函数分析与评价，适宜浓度的GGR浸种（30 mg·L-1）能显著促进小麦种子萌发以及幼苗的生长，缩短种子发芽时间，对小麦实际栽培过程中培育壮苗、提质增产具有重要意义。

Effects of Seed Soaking with Exogenous Plant Growth Regulator GGR on Seed Germination and Seedling Growth of Wheat

In order to screen out the best application concentration of plant growth regulator GGR 6 in wheat pre-sowing seed treatment, the seeds of Yan Nong 19 were used as the experimental material in this experiment. A total of 7 soaking treatments of 0, 5, 10, 20, 30, 50, and 100 mg · L ? 1 were set to study the effects of different concentrations of GGR soaking on wheat seed germination and seedling growth. The results showed that the germination rate, germination potential, germination index and vigor index of wheat seeds treated with 30 mg · L ? 1 GGR were the highest, which were 12.09 %, 15.31 %, 31.55 % and 42.09 % higher than those of CK, respectively. The plant height of wheat seedlings was the highest with 20 mg · L-1 GGR soaking treatment, which was significantly increased by 32.00 % compared with CK. The root length of wheat was the highest with 50 mg · L-1 GGR soaking treatment, which was significantly increased by 10.26 % compared with CK. The stem diameter, leaf length, root volume, seedling fresh weight, seedling index, chlorophyll a, chlorophyll b and carotenoid content of wheat seeds treated with 30 mg · L-1 GGR were significantly increased by 45.19 %, 25.37 %, 68.18 %, 66.34 %, 35.53 %, 36.50 %, 146.88 % and 131.03 %, respectively, compared with CK. Comprehensive membership function analysis and evaluation, the appropriate concentration of GGR soaking ( 30 mg · L-1 ) can significantly promote the germination of wheat seeds and the growth of seedlings, shorten the germination time of seeds, which is of great significance for cultivating strong seedlings, improving quality and increasing yield in the actual cultivation of wheat.