摘要
对火炬松引种家系进行生理、生化指标测定,并分析其与生长性状的关系,结果表明:针叶的叶绿素、类胡萝卜素含量和矿质营养元素含量在家系间差异显著。各叶绿素组分与类胡萝卜素含量呈极显著正相关,它们与各生长性状呈中度正相关,与树高的相关系数达显著水平。高叶绿素含量和低叶绿素a/b可作为速生家系选择的重要参考指标。N、P、K这3种元素的吸收具有相互促进作用,它们与各生长因子呈极弱正相关,其中又以P的相关性最强。
The physiological and biochemical index of loblolly pine was determined and its relationship with growth traits was analyzed. The results indicate that there is significant difference among families in chlorophyll, carotenoid and nutrient content of needle. The positive correlation coefficient reaches great significant level between chlorophyll and carotenoid content. There is middle positive correlativity between them and growth traits. The positive correlation coefficient reaches significant level between them and height. High chlorophyll content and low chlorophyll a/b are important reference criterion of selection of fast growth families. Absorption of nutrients N,P and K accelerates one another. Nutrient content and growth traits have weak positive correlativity. Nutrient P affects growth speed more greatly.
基金
福建农林大学青年教师基金资助项目(03B05)
