增产胺浸种对玉米幼苗生长的影响

Effect of Seed Soaking with DCPTA on Growth of Maize Seedlings

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0．67mL／L，0．4mL／L，0．29mL／L浓度下低于对照，2mL／L浓度下高于对照；发芽种子呼吸速率在0．67mL／L，0．4mL／L，0．29mL／L浓度下高于对照，2mL／L浓度下低于对照；玉米幼苗丙二醛含量在0．67mL／L，0．4mL／L，0．29mL／L浓度下高于对照，2mL／L浓度下低于对照。

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. 67mL/L, 0. 4mL/L and 0. 29mL/L DCPTA was lower than CK but the total chlorophyll, chlorophyll a and chlorophyll b content of seedling treated by 2mL/L DCPTA was higher than CK, the respiratory rate of germinating seeds treated 0. 67mL/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 0.29mL/L DCPTA was higher than CK but the MDA content of seedlings treated by 2mL/L DCPTA was lower than CK.