火力楠等3种阔叶树幼苗的养分分布格局

Distribution Patterns of Nutrients in Seedlings of Three Broad-leaved Tree Species

研究了火力楠、红苞木、大叶相思幼苗的养分分布格局。结果表明 :3种树种各器官的干重排序火力楠为根 >干 >叶 >枝 ,红苞木为叶 >根 >干 >枝 ,大叶相思为干 >叶 >根 >枝。 3种树种的养分浓度为N >K >Ca >P >Mg ,养分总浓度大叶相思 >火力楠 >红苞木。 3种树种各器官的养分总贮量排序火力楠为根 >叶 >干 >枝 ,红苞木为叶 >根 >干 >枝 ,大叶相思为叶 >干 >根 >枝。 3种树种各器官中的养分贮量多为N >K >Ca >P >Mg ,其养分总贮量也为N >K >Ca >P >Mg。

Distribution patterns of nutrients were studied in seed li ngs of broad-leaved Michelia macclurei, Rhodoleia championii, and Acacia auriculiformis tree species. The order of dry weight in various organs was roo ts>stem>leaves>branches for Michelia macclurei, leaves>roots>stem>bran ches for Rhodoleia championii and stem>leaves>roots>branches for Acacia auriculiformis. The order of total dry weight for various seedlings was Mic helia macclurei>Acacia auriculiformis>Rhodoleia championii. Nutrient concentration was in the order of N>K>Ca>P>Mg. Total nutrient concentration in various seedlings was in the order of Acacia auriculiformis>Michelia m acclurei>Rhodoleia championii. The order of total amount of nutrients in v arious organs was roots>leaves>stem>branches for Michelia macclurei, leaves> roots>stem>branches for Rhodoleia championii, and leaves>stem>roots>branche s for Acacia auriculiformis. The amount of nutrients in various organs was gener ally ranked in turn N>K>Ca>P>Mg. The amount of nutrients in three seedlings was also ranked in turn N>K>Ca>P>Mg.