增产胺浸种对玉米幼苗生长的影响

为探讨不同浓度的DCPTA浸种处理对玉米幼苗生长的影响,研究了增产胺(DCPTA)对玉米种子发芽成苗及其生物量的影响。结果表明:DCPTA浸种处理能显著增加玉米幼苗的高度,使2叶期幼苗的株高增加了7.41%~40.10%,使根冠比、地下部分干重增加,增长率分别达到13.36%~29.77%和2.47%~113.58%。玉米幼苗叶片叶绿素总含量、叶绿素a、叶绿素b在0.67 mL/L,0.4 mL/L,0.29 mL/L浓度下低于对照,2 mL/L浓度下高于对照;发芽种子呼吸速率在0.67 mL/L,0.4 mL/L,0.29 mL/L浓度下高于对照,2 mL/L浓度下低于对照;玉米幼苗丙二醛含量在0.67 mL/L,0.4 mL/L,0.29 mL/L浓度下高于对照,2 mL/L浓度下低于对照。

Effect of Seed Soaking with DCPTA on Growth of Maize Seedlings

Maize seeds were soaked by different concentration DCPTA to study the effects on their germination, seedling growth and biomass. The results showed that the maize seedling height, crown/root ratio and aerial dry weight of maize seedlings from their seeds treated by DCPTA was 7.41%～40.10%,13.36%～29.77% and 2.47%～113.58% higher than CK respectively, the total chlorophyll, chlorophyll a and chlorophyll b content of seedlings treated by 0.67 mL/L,0.4 mL/L and 0.29 mL/L DCPTA was lower than CK but the total chlorophyll, chlorophyll a and chlorophyll b content of seedling treated by 2 mL/L DCPTA was higher than CK, the respiratory rate of germinating seeds treated 0.67 mL/L,0.4 mL/L and 0.29 mL/L DCPTA was higher than CK but the respiratory rate of germinated seeds treated by 2 mL/L DCPTA was lower than CK, and the MDA content of seedlings treated by 0.67 mL/L,0.4 mL/L and 0.29 mL/L DCPTA was higher than CK but the MDA content of seedlings treated by 2 mL/L DCPTA was lower than CK.