【摘要】 为探究极端干旱区凋落物分解特征,利用凋落物分解袋法,以塔克拉玛干南缘策勒绿洲边缘荒漠地区优势植物花花柴(Karelinia caspia)、骆驼刺(Alhagi sparsifolia)和胡杨(Populus euphratica)的叶片凋落物为对象进行分解试验,探究极端干旱区凋落物分解特征及主要影响因素。结果表明:(1)极端干旱区凋落物分解主要在凋落次年的5—9月,有机物的损失是质量损失的重要原因;(2)对于水溶性盐含量较高的凋落物,水溶性盐损失在质量损失中占较高比例;(3)降雨是影响极端干旱区凋落物分解的重要因素,降雨与凋落物分解的Pearson相关性显著高于温度和太阳辐射。更多还原

【Abstract】 To explore the litter decomposition characteristics in extreme arid regions,three types of leaves litter( Karelinia caspia,Alhagi sparsifolia and Populus euphratica) were selected as test objects. Using litter bag method,litter decomposition experiments were conducted in the desert area of the southern margin of Taklimakan Desert. The results showed that:( 1) After one year decomposition in extreme arid areas,litter decomposition is mainly concentrated in May to September,the loss of organic matter is an important reason of weight loss;( 2) For litter with high water soluble salt content,water soluble salt loss accounts for a higher proportion of weight loss;( 3) Rainfall is an important factor affecting litter decomposition in extreme arid areas. The relationship between rainfall and the Pearson correlation of litter decomposition is significantly higher than between temperature and solar radiation.更多还原