不同温度下喷施宝对花生萌芽及幼苗生长的效应

The Effect of Penshibao on Seed Germination and Seedlings of Peanut Under Different Temperatures

针对花生萌芽及幼苗生长受温度逆境条件制约的生产现实问题 ,研究了不同温度下不同浓度的喷施宝溶液浸种对花生萌芽及幼苗生长的效应 .表明在温度胁迫条件下喷施宝能提高萌芽率和促进胚根生长 ,其中 10 0 0mg/L浓度处理促萌最明显 ,30 0mg/L处理对胚根长度、直径增加最显著 .经喷施宝处理的种子出苗后幼苗株高较矮 ,分枝数和地上部质量增加 ,叶片叶绿素、蛋白质和可溶性糖含量提高 ,叶片硝酸还原酶活性提高 ;幼苗根系活力提高 ,主根长度、直径、侧根数和地下部质量增加 ,以 30 0～ 5 0 0mg/L的效果为佳 ;根瘤菌个数和鲜质量也有所增加 ,以 10 0～ 30

The effects of Penshibao, one of plant nutritional regulator on the seed germination and seedlings growth of peanut under different temperatures were studied. Peanut seeds soaked with different concentrations of Penshibao (P.S.B) increased germination rate, the length of radical as well as its diameter under different temperatures. The germination ratio was in the highest when concentration was 1 000 mg/L; the increasements of radical length and its diameter were the most significant when concentration was 300 mg/L. P.S.B also stunted seedlings growth, increased branching numbers, the mass of the aerial part, and the content of leaf chlorophyll, protein and dissolvable sugar.It also promoted the leaf nitrate reductase activity and the root activity of seedling. For aerial part ,the better concentration was 300-500 mg/L .Besides, it also increased the elongation of taproot,its diameter, amounts of nodules and seedling fresh mass. The best concentration for the elongation of taproot was 100-300 mg/L.