Study on the Allelopathy of Alfalfa (Medicago sativa L.) : I. Observation of allelopathy and survey for substances inducing growth inhibition

Japanese Journal of Crop Science

Takashi MITSUMIZO¹  Kana NAKAHISA¹  Eiji TSUZUKI¹ 

关键词: Alfalfa;    アルファルファ;    Allelopathy;    アレロパシー;    Growth inhibitors;    生長抑制物質;    Growth injury by continuous cropping;    連作障害.;    Medicago sativa.;   

DOI  :  10.1626/jcs.62.294

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

Allelopathic effects of alfalfa (Medicago sativa L.) plants were investigated using soil previously grown with alfalfa (alfalfa soil). Alfalfa soil inhibited the emergence of alfalfa seeds and also the growth of alfalfa and radish. Methanol extracts from the alfalfa soil markedly inhibited the elongation of radish hypocotyl and alfalfa radicle, suggesting the presence of allelopathic substances. The incorporation of cut pieces of alfalfa shoots in the soil reduced seed emergence, hypocotyl elongation and dry weight in radish seedlings to 65, 73 and 81%, respectively, compared to the control. Aqueous extracts of alfalfa plants inhibited the elongation of radish hypocotyl and alfalfa radicle. Inhibition increased with increasing concentrations. Inhibition of radish hypocotyl and alfalfa radicle elongation was greater in root extracts than in shoot extracts. The presence of phenolic compounds as allelopathic substances in alfalfa soil, as well as in the alfalfa plant, was suggested using color reaction with diazotized sulfanilic acid.

【 授权许可】

Unknown