Semiquantitative color profiling of soils over a land degradation gradient in Sakaerat, Thailand
Semiquantitative color profiling of soils over a land degradation gradient in Sakaerat, Thailand
复制标题
泰国沙卡拉土地退化梯度土壤的半定量颜色分析
DOI：
10.1007/s10661-009-1233-x
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发表时间：
2010
影响因子：
3
通讯作者：
P. Sahunalu
中科院分区：
文献类型：
--
作者：
R. Doi;C. Wachrinrat;S. Teejuntuk;K. Sakurai;P. Sahunalu
在这项研究中，我们尝试对泰国沙卡叻的干燥常绿森林（原始植被）、干燥落叶林（中度受火灾干扰）和裸地（严重退化）代表的土地退化梯度上的土壤进行多变量颜色分析。在干湿季节过渡期间对土壤进行采样。使用数字软件 Adobe PhotoshopTM 确定红-绿-蓝 (RGB)、青-品红-黄-键黑 (CMYK)、L*a*b* 和色调-强度-饱和度 (HIS) 颜色模型的值。土地退化导致 R、C、Y、L*、a*、b*、S 和 I 值显着变化 (p< 0.05) (p< 0.05)。季节转换在 R、G、B、C、M、K、L*、b* 和 I 值中产生显着变化 (p< 0.05)。在区分土壤时，颜色模型的区分力没有差异，但区分力受到季节变化的影响。大多数颜色变化模式与土地退化梯度的强度具有非线性关系，因为火灾使落叶森林土壤变暗，掩盖了土壤作为常绿森林和裸地土壤之间的中间体的性质。考虑到这些发现，讨论了土壤颜色分析在土地保护和恢复中的应用。
In this study, we attempted multivariate color profiling of soils over a land degradation gradient represented by dry evergreen forest (original vegetation), dry deciduous forest (moderately disturbed by fire), and bare ground (severely degraded) in Sakaerat, Thailand. The soils were sampled in a dry-to-wet seasonal transition. Values of the red–green–blue (RGB), cyan–magenta–yellow–key black (CMYK),L*a*b*, and hue–intensity–saturation (HIS) color models were determined using the digital software Adobe PhotoshopTM. Land degradation produced significant variations (p< 0.05) inR,C,Y,L*,a*,b*,S, andIvalues (p< 0.05). The seasonal transition produced significant variations (p< 0.05) inR,G,B,C,M,K,L*,b*, andIvalues. In discriminating the soils, the color models did not differ in discriminatory power, while discriminatory power was affected by seasonal changes. Most color variation patterns had nonlinear relationships with the intensity of the land degradation gradient, due to effects of fire that darkened the deciduous forest soil, masking the nature of the soil as the intermediate between the evergreen forest and the bare ground soils. Taking these findings into account, the utilization of color profiling of soils in land conservation and rehabilitation is discussed.