水稻品种化感特性与农艺性状的关系

选用9个华南地区主栽水稻品种，用特征次生物质标记方法测定它们的化感指数，并通过田间实验确定这些水稻品种的抑草效应及主要农艺性状，在此基础上分析这些水稻品种的化感特性、抑草效应和农艺性状的关系.结果表明，具有化感特性的水稻品种并不都能在田间表现出抑草效应，化感特性与主要农艺性状均无显著的相关性，但同时具有化感特性和有利竞争农艺性状的水稻品种均能在田间显示抑草效应.水稻化感特性和农艺性状的不相关显示化感特性转入相关的水稻品种将不影响它们的农艺性状，这意味着能培育出各种农艺性状的水稻化感新品种.

Relationships between allelopathic traits and agronomic characters of allelopathic rice varieties

By using specific secondary metabolites as markers,this paper determined the allelopathic indices of nine allelopathic rice varieties widely cultivated in South China,and evaluated the main agronomic characters of these varieties and their weed-inhibiting effects in field.The correlations among allelopathic indices,agronomic characters and weed-inhibiting effects of test rice varieties were also analyzed.The results indicated that not all the rice varieties demonstrated their weed-inhibiting effects in field,and there were no relationships between allelopathic traits and main agronomic characters.However,the rice varieties with both allelopathic traits and competitive agronomic characters could significantly inhibit the weeds in field.The non-correlation between allelopathic traits and main agronomic characters of test rice varieties suggested that the transfer of allelopathic traits into rice varieties did not affect their agronomic characters,i.e.,it's possible to breed allelopathic rice cultivars with any agronomic characters.