不同胁迫条件下决明对百喜草的化感作用  

Allelopathic effects of Chamaecrista spp.on Paspalum notatum under various environmental stresses

作　　者：高承芳[1,2] 翁伯琦[2] 王义祥[2] 徐国忠[2] 

机构地区：[1]福建农林大学资源与环境学院,福建福州350002 [2]福建省农科院农业生态研究所,福建福州350013

出　　处：《福建农业学报》2008年第4期403-407,共5页Fujian Journal of Agricultural Sciences

基　　金：国家科技成果转化项目(2007GB2C400151);福建省自然科学基金项目(B0610017);福州市科技计划项目(2006-K-114);福建财政专项-福建省农科院创新团队项目(STIF-Y01)

摘　　要：探讨在温度、pH值和模拟干旱(聚乙二醇)胁迫条件下,圆叶决明和羽叶决明对百喜草的化感作用。结果表明,在不同温度处理条件下圆叶决明和羽叶决明对百喜草种子发芽、苗高和根长的影响总体上表现是温度高(27℃)时和温度低(23℃)时均对百喜草种子发芽有抑制作用,而温度在25℃则表现出促进作用;在3个不同浓度聚乙二醇(PEG)胁迫下,决明对百喜草生长均表现出一定的抑制作用,其中在PEG浓度为20%时抑制最为明显;不同酸碱度(pH)胁迫下决明对百喜草的影响总体表现是高pH抑制,低pH促进。Allelopathy of Chamaecrista spp on Paspalum notatum was studied. The result indicated that temperature affected the allelopathy. Germination of P. notatum was retarded at 27℃ or 23℃, while promoted at 25℃. At 3 different concentrations of PEG, Chamaecrista spp inhibited the growth of P. notatum. When the PEG concentration was 20%, the inhibition effect was most significant. In general, high pH retarded and low pH promoted the P. notatum growth.

关 键 词：温度 pH值 PEG 决明属 百喜草 化感作用 

分 类 号：S54[农业科学—作物学] Q945[生物学—植物学]