1年生麻竹营养元素积累与分配规律研究

The Accumulation and Distribution Characteristics of Nutrient of Dendrocalamus latiflorus

对广西1年生麻竹林不同器官生物量、含水率及营养元素的主要指标进行了测定,研究1年生麻竹幼林的生物量、含水率、营养元素积累及其分配特征。结果表明,该地区的麻竹林单株生物量为39.75 kg,各器官生物量大小分配顺序为:秆>枝>蔸>叶>根;各器官含水率高低的排列顺序为:枝>蔸>叶>秆>根。麻竹中各营养元素含量的大小排列为N﹥K﹥P﹥Ca﹥Mg﹥Fe﹥Mn﹥Zn﹥Cu﹥B。麻竹各器官营养元素总含量大小排列为叶﹥根﹥蔸﹥枝﹥秆。试验所研究的麻竹林树体营养元素总贮存量为601.26 g/株,麻竹各器官营养元素贮存量的大小排列为秆﹥叶﹥枝﹥蔸﹥根。麻竹营养元素分配与各器官的生物量不成正比例关系。

The biomass, water content ＆ other important indicators of nutrient in different organs of Dendrocala- mus latiflorus from Guangxi Province were analyzed. The results showed that mean biomasses of individual Dendrocalamus latijqorus was 39.75 kg in the area, the biomasse of different organs was in a order of culm 〉 branch 〉 stump 〉 leaf 〉 root, the water content rate of different organs was in a order of branch 〉 stump 〉 leaf 〉 culm 〉 root. The content size of nutrient elements of Dendrocalamus latijqorus was in a order of N 〉 K 〉 P 〉 Ca 〉 Mg 〉 Fe 〉 Mn 〉 Zn 〉 Cu 〉 B, the total nutrient content size in different plant parts was in a order of leaf 〉 root 〉 stump 〉 branch 〉 culm, the total storage of Dendrocalamus latiflorus tree nutrient elements was 601.26 g per plant in the study area, the storage of nutrient elements in different plant parts of Dendrocalamus latiflorus was in a order of culm 〉 leaf 〉 branch 〉 stump 〉 root. There was no any direct proportionate relationship between distribution of nutrient elements and biomass of different plant parts of Dendrocalamus latiflorus.