Spatial distribution characteristics of land cover of small watershed and its influencing factors in Hilly-gullied region of Loess Plateau in China

• Published in: Xi bei nong lin ke ji da xue xue bao.Zi ran ke xue ban Vol. 38; no. 8
• Main Authors: Qi Zhijun, Northwest Agriculture and Forestry University, Yangling (China), College of Forestry, Xu Mingxiang, Northwest Agriculture and Forestry University, Yangling (China), College of Forestry
• Format: Journal Article
• Language: Chinese
• Published: 01.08.2010
• Subjects: COBERTURA DE SUELOS; COUVERTURE DU SOL; DISTRIBUCION ESPACIAL; DISTRIBUTION SPATIALE; HIGHLANDS; http://www.fao.org/aos/agrovoc#c_3614; http://www.fao.org/aos/agrovoc#c_36230; http://www.fao.org/aos/agrovoc#c_37897; LAND COVER; REGION D'ALTITUDE; SPATIAL DISTRIBUTION; ZONA DE MONTANA

研究了小流域土地覆被物的主要类型、空间分布特征及其影响因素，为黄土丘陵区复杂地形条件下的流域水土流失防治及评估提供参考。在陕北黄土丘陵区安塞县的大南沟、纸坊沟、县南沟3个小流域，选取172个样地调查了植被、枯落物及生物结皮等土地覆被物的盖度、厚度及所处的地形条件等数据，并运用SPSS 13.0进行了分析。黄土丘陵区小流域土地覆被物以草本盖度最大，枯落物和生物结皮盖度次之，乔木和灌木盖度较小；植被盖度在沟坡大于梁峁坡，阴坡和半阳坡大于阳坡，不同坡度之间无显著规律，不同地形条件下枯落物盖度的变化与植被的变化趋势一致，生物结皮盖度的空间分布与植被盖度和枯落物盖度呈相反趋势；小流域9个土地覆被物指标可...