摘要
灌木在干旱半干旱地区的生态系统中具有重要作用,高精度、非破坏性的灌木生物量估算方法已成为亟需解决的问题。利用数码拍照法对狼牙刺、山桃、沙棘、柠条、丁香、虎榛子、荆条和酸枣8种灌木进行水平拍照,采用Photoshop7.0图像处理软件提取了各灌木植株的照相面积(S)、高度(H)、宽度(D)、冠层高度(h)等信息,建立了不同灌木的生物量拟合方程,具有良好的精度。灌木侧面照相面积(S)与植株的生长情况密切相关,因此可建立灌木生物量估算的通用线性模型,其决定系数达到0.927 5,估算精度较高。利用数码照片估算灌木的生物量是一种非破坏性、简单方便、具有较高精度的方法,在灌木生物量估算中具有广泛的前景。
Shrub played an important role in the ecosystem of arid and semi-arid region,and the biomass estimated method of shrub with high-precision and non-destructive became an urgent need.Eight species shrubs including Sophora davidii,Prunus davidiana,Hippophae rnamnoides,Caragana purdomii,Syringa vulgaris,Ostryopsis davidiana,Vitex negundo var.heterophylla and Poliothyrsis sinensis were taken pictures by using digital cameral;and some information such as area（S）,height（H）,width（D）,canopy height（h） of shrubs were extracted by Photoshop7.0.The fitting equation of biomass of different kinds of shrubs was established,and had a good precision.Side photography area of photo（S） had a close relationship with growth situation of shrubs,so the general linear model of shrub biomass estimate can be established,and its determined coefficient reached 0.927 5,the estimation accuracy was higher.The method of digital photographs is a non-destructive,simple and convenient method with higher accuracy to estimate the biomass of shrubs,which had a wide range of prospects in biomass estimating of shrubs.
出处
《安徽农业科学》
CAS
北大核心
2010年第7期3620-3624,共5页
Journal of Anhui Agricultural Sciences
基金
国家自然科学基金重点项目(30230290)
黄土高原土壤侵蚀与旱地农业国家重点实验室基金项目
关键词
数码拍照
灌木
地上生物量
估算模型
Digital photograph
Shrub
Aboveground biomass
Estimation model
