摘要
疏透度不仅是评价防护林林带结构的定量化指标和表征林带结构的重要特征参数,同时也是区别林带结构优劣的最主要指标之一。通过运用“数码相机”与“遥感图像处理软件”(ENVI)相结合的林带疏透度数字化测定方法,表明其是一种操作程序简便,实用性强,能够快速、准确地测定林带相片疏透度的方法。得出将该方法应用于新疆克拉玛依农业综合开发区农田防护林疏透度的测定,通过逐步回归分析得出,林带疏透度(β)与林带行数(N)和树木株距×行距(Q)之间存在显著的相关关系。
Porosity is not only a quantitative index of estimating farmland windbreak structure and an importantparameter of characterizing windbreak structure, but also one of the most important indices of distinguishing thequality of windbreak structure. In this paper,the digitized measurement on windbreak porosity combining withdigital camera and software of remote sensing image processing is developed. The results show that its operatingprocess is simple and convenient,its application is wide,and it can be used to measure accurately and fleetlywindbreak porosity. This method is used to measure the porosity of the shelter-forests in the Karamay AgriculturalDevelopmental Region in Xinjiang,and the result of stepwise regression reveals that there is a significantcorrelation between windbreak porosity β and number of rows (N) and the prow spacing (Q),which can beexpressed as: β=0.116+0.024N+0.039Q (R=0.529), (0≤β≤1).
出处
《干旱区地理》
CSCD
北大核心
2005年第1期120-123,共4页
Arid Land Geography
基金
国家"十五"科技攻关课题(2004BA606A-10
2002BA517A-07)
