Allelopathy of Corn and Wheat Straw Aqueous Extracts on Vegetable Seeds

doi:10.7668/hbnxb.2009.S2.031

Abstract

Abstract: The allelopathy of corn and wheat straw aqueous extracts on seed germination and the growth of cucumber, lettuce and eggplant was investigated by means of bioassay in laboratory. The results showed that the effects of straw aqueous extracts on vegetables seed germination had many forms:inhibit effects, promotion effects, promotion/inhibition double effecs and no siginificant effect. Corn straw aqueous had significantly inhibited vigor index, root length and fresh weight of seedling of cucumber, and seedling height and dry weight was increased at lower conentration and decreased at higher concentration. Corn straw aqueous significantly inhibited seed germination and root growth of lettuce and eggplant, and had promotion/inhibit double effecs on seedling height and fresh weight. Wheat straw aqueous increased seedling height and fresh weight of cucumber, and decreased vigor index and root length of lettuce, and had promoted/inhibited effect on root length, seedling height and fresh weight. Wheat straw aqueous significantly decreased eggplant seed germination rate, and had promoted/inhibited effect on root length, seedling height and fresh weight. According to sensitivity index, the allelopathical effect of corn straw aqueous extracts was stronger than that of wheat straw aqueous extracts on tested vegetables. The allelopathical sensitivity to straw aqueous exracts was different among the tested vegetables, with lettuce being the most sentitive, eggpant being more sentitive and cucumber being the least sensentive.

Key words: Straw, Straw aqueous extracts, Allelopathy, Seed germination

CLC Number:

S451

WU Hui-qin, DONG Lin-lin, WANG Qian. Allelopathy of Corn and Wheat Straw Aqueous Extracts on Vegetable Seeds[J]. ACTA AGRICULTURAE BOREALI-SINICA, doi: 10.7668/hbnxb.2009.S2.031.

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http://www.hbnxb.net/EN/Y2009/V24/IS2/140

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