摘要
对黄土高原主要造林树种刺槐根系及其林地土壤水分进行调查和监测,结果表明,在阴坡立地上,刺槐细根在距树干2.0m范围内的水平分布无明显差异,最大分布深度均为2.0m;而阳坡立地上刺槐细根在距树干0.5m处的垂直分布深度可达2.0m,且阴坡立地上细根密度特征值明显大于阳坡.根系对土壤深层水分的影响范围因不同立地条件下根系分布空间差异而不同,在阳坡立地上,刺槐根系对深层土壤水分的影响深度可达2.7m处的土层,而在阴坡立地上,这种影响范围可达3.3m处的土层.
The study on the root distribution characters of Robinia pseudoacacia and soil moisture status in the Loess Plateau showed that on shady slope, there was no obvious difference in the horizontal distribution of R. pseudoacacia fine roots within 2.0 m from the stem, and the maximal distribution depth of the roots could reach 2.0 m. In sunny slope, the vertical distribution of the roots within 0.5 m from the stem could also reach that depth. The root amount in shady slope was larger than that in sunny slope, and the affected depth of R. pseudoacacia roots on soil moisture status reached 3.3 m in shady slope, while 2.7 m in sunny slope.
出处
《应用生态学报》
CAS
CSCD
北大核心
2006年第5期765-768,共4页
Chinese Journal of Applied Ecology
基金
国家自然科学基金项目(30371150)
教育部博士点项目(20030712002)
黄土高原土壤侵蚀与旱地农业国家重点实验室资助项目(10501-123)
关键词
土壤水分
刺槐
根系
Soil moisture, Robinia pseudoacacia, Root system.
