摘要： 研究了棉花腐殖质中的3种主要化感物质亚油酸、软脂酸和邻苯二甲酸二丁酯对棉花幼苗生长的影响。结果表明,这3种物质对棉花幼苗生长在低浓度时表现为促进作用,促进了棉花地上器官和根系生长,降低了超氧化物歧化酶、过氧化氢酶活性,降低了丙二醛含量,提高了根系活力,而在高浓度时表现为抑制作用。其中,软脂酸表现出的抑制作用最强,亚油酸次之,邻苯二甲酸二丁酯最弱。3种化感物质按腐殖质中比例混合(亚油酸:软脂酸:邻苯二甲酸二丁酯=5:6:7),表现出更强的抑制作用,表明3种物质彼此之间存在明显的协同作用。

关键词: 棉花, 腐殖质, 化感物质, 化感效应

Abstract: In this experiment, we studied the effect of cotton seeding growth and development by the three main allelochemicals in cotton humus linoleic acid,palmitic acid and dibutyl phthalate. The results showed that these three substances promote the cotton seeding growth at low concentrations. Promote the growth of cotton shoots and roots,reducing superoxide dismutase and hydrogen peroxide activity reduced the MDA content and improve the root of the root activity and inhibit the growth of cotton in high concentrations. Among them palmitic acid showed the strongest inhibition linoleic acid,followed by,dibutyl phthalate weakest. Three allelochemicals mixed as the proportion in humus (linoleic acid:palmitic acid:dibutyl phthalate=5:6:7),showed greater inhibition, experiments recult indicated there was obvious synergetic effect among these substances.

Key words: Cotton, Humus, Allelochemicals, Allelopathic effects

中图分类号: 

• S562.01