新疆杨元素含量与生物量研究

新疆杨(Populus bolleana Lauche)在我国新疆栽培最早,尤以和田、喀什地区生长最好。青海、甘肃、宁夏亦早有栽培,近十余年在陕西、内蒙、山西、辽宁、吉林诸省和北京市也有引种,是我国干旱、半干旱地区农田防护林及人工丰产林的优良树种。为进一步利用新疆杨资源,研究其生物量将具有实际应用价值。

A STUDY ON NUTRIENT CONTENT AND BIOMASS OF POPULUS BOLLEANA

45 sample trees of p.bolleana were collected from the plantation at Su Le, Mai Gai Ti and Ye Cheng counties in Xinjiang Autonomus Region for study.The study showed that the contents of sugar, raw-vegetable fat, and animo acids per kg of dry leaves are 28.005 g, the content of common mineral elements 11.1907%, the content of trace elements 126.3ppm.The leaf is a good feed for livestock.The nutrient contents of branch, stem, root, and bark were analysed too.Twelve dualistic prediction regression models, namely regular increment of biomass, total biomass, biomass of stem, stembark, branch, branchbark, leaf, root, silted-stem and stem per m³, total biomass of stem per m³, number of leaves and leaf area were obtained.The total biomass per mu of a ten-years stand with a stand density of 3×3 is up to 7506kg, the biomass of stem per m³ 609kg.