Spatial distribution pattern of Populus euphratica fine roots in desert riparian forest
Spatial distribution pattern of Populus euphratica fine roots in desert riparian forest
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作者：
Si Jian-hua
研究植物细根的空间分布格局是构建植物根系吸水模型的基础。对荒漠河岸林胡杨细根空间分布格局的研究表明，在水平方向上，胡杨根长密度的分布呈抛物线型。细根主要集中在距树干0-350 cm范围内，其数量占0-500 cm范围内细根总量的91.88%。在垂直方向上，细根长密度的分布与土层深度呈负指数相关。细根主要集中在0-80 cm土层，占0-140 cm土层细根总量的96.8%。
To study the spatial distribution pattern of plant fine root is the basis of constructing water uptake model of plant roots. The study on the spatial distribution pattern of Populus euphratica fine roots in desert riparian forest showed that horizontally, the distribution of P. euphratica root length density presented a parabola curve. The fine roots were concentrated within the range of 0-350 cm from the tree trunk, and their amount occupied 91.88% of the total within 0-500 cm. In vertical direction, the distribution of the fine root length density showed a negative exponent correlation with soil depth. The fine roots were concentrated in 0-80 cm soil layer, and their amount accounted for 96.8% of the total in 0-140 cm soil layer.