黄土高原中部沙棘林干物质积累机理  

Growth Mechanism for Biomass of Seabuckthorn Stand in the Middle Loess Plateau

作　　者：土小宁[1] 许涛[1] 夏静芳[1] 

机构地区：[1]水利部沙棘开发管理中心,北京100038

出　　处：《国际沙棘研究与开发》2005年第3期26-29,35,共5页

基　　金：国家"十五"科技攻关项目(2004BA510B0103);水利部"948"项目(200207)资助

摘　　要：本文应用标准地-标准木-分层切割法对黄土高原中部陕西延安沙棘人工林的生长量、生物量和生产力开展了研究,并建立了气候生产力模型,结果表明:随着沙棘林个体年龄的增长,其树高、胸径、材积累计生长量逐渐增加,20年生沙棘人工林材积平均生长量和连年生长量平均值分别为:0.2823×10-4m3和0.5731×10-4m3,生物量现存量为33.5818t·hm-2,80%以上为主林冠层;沙棘林年净生产量369.9454g·m-2,降水生产力为917.8200g·m-2·a-1,该区域沙棘林生产潜力很大。The growth, biomass and productivity as well as the productivity models of seabuckthorn stand have been studied by standard sampling in Yanan, Shaanxi Province, the middle Loess Plateau. The results show as followed： the growth in height, basal diameter and volume of seahuckthorn stand do gradually increase with it＇ s age increasing. The average annual volume growth and current annual volume growth of 20 year-old seahuckthorn stand is 0. 2823 × 10^-4 and 0. 5731 × 10^-4m^3 respectively. The standing hiomass of the stand is 33. 5818t · hm^-2, more than 80.00 percent is main canopy layer of it. The net annual productivity is 369. 9454g · m ^-2, and is only 40.31 percent of potential productivity for precipitation, so seabuckthorn stand in the area has tremendous potential productivity.

关 键 词：沙棘 干物质 积累机理 

分 类 号：S793.625.7[农业科学—林木遗传育种]