摘要
论文以库布齐沙漠沙柳沙障固沙地迎风坡不同部位沙粒、黑色及绿色生物结皮为研究对象,通过实地采集地物光谱数据,对比分析了其在迎风坡不同部位的光谱反射特性及变化规律。研究结果表明:土壤颗粒的大小直接关系到土壤反射率高低,随着人工固定沙地地表土壤中粉粒和黏粒含量的增加,其地表反射率呈下降的趋势;黑色生物结皮的光谱反射率曲线总体变化比较平缓,与维管植物相比差异较大,反映到光谱曲线上典型特点是"红边"位置基本不存在;绿色结皮的光谱特性从绿光波段反射峰、叶绿素吸收峰及高反射区等方面与维管植物比较相近,最典型的特点是"红边"不仅存在而且非常明显,说明绿色生物结皮比黑色生物结皮更接近维管植物的特点。
This paper take the sand, black and green biological crust in different parts of Windward Slope of Dune Fixed by Sand Barriers of Salix Psammophila as rearch objects, measured tile spectral data in study field, compared and anylyzed the spectral reflec- tance characteristics and variation law. The results show that the size of the soil particles is directly related to the level of soil reflec- tance, with silt and caly increasing, the spectral reflactance of soil presents downtrend; Compared with vascular plants, the curve of spectral reflactanc of black biological crust is relatively gentle, ＂ red edge＂ does not exsist basiclly; In terms of green band reflection peak, chorophyll absorption peak and high reflective area, the spectral characteristics of green crust is relatively similar to the vascular plants, the defining characteristic is that the ＂red edge＂ not only exists but also is very obvious, this shows that the characteristic of green biological crust is closer to vascular plants than black biological crust.
出处
《内蒙古农业大学学报（自然科学版）》
CAS
北大核心
2013年第3期71-76,共6页
Journal of Inner Mongolia Agricultural University(Natural Science Edition)
基金
内蒙古自然科学基金项目(2011BS0608)
林业公益性行业科研专项项目(201104002-5)
教育部新教师基金项目(2009151520005)
