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首页> 外文会议>International Soil Conservation Organization Conference vol.3; 20020526-31; Beijing(CN) >Growth and Water Resource Utilization of Acacia Crassicarpa, Senna Siamea and Leucaena Pallida Tree Species Established in Rotational Woodlots Agroforestry System in Western Tanzania
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Growth and Water Resource Utilization of Acacia Crassicarpa, Senna Siamea and Leucaena Pallida Tree Species Established in Rotational Woodlots Agroforestry System in Western Tanzania

机译：坦桑尼亚西部轮伐林地农林业系统建立的相思树，番泻树暹罗和白桦树种的生长和水资源利用

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摘要

We studied growth and water use by Acacia crassicarpa, Leucaena pallida and Senna siamea that were established and managed together with field crops for three consecutive years. At the end of the third year the fields were left fallow to allow trees to grow and build up soil fertility. Tree growth parameters and survival were monitored at different period of the study. The amount of water transpired by trees was measured by using heat pulse system on three-year-old trees. The studied species established effective woodlots with good stands and A. crassicarpa had the fastest growth rate. Results on water use showed that the mean daily transpiration by A. crassicarpa, L. pallida and S. siamea ranged from 350 to 1,700 grams and was largely determined by the stem diameters, the size of the tree canopy and the soil moisture availability. Acacia crassicarpa showed better performance in terms of growth height and root collar diameter while L. pallida showed better water utilisation. The results have implications on the benefits of the rotational woodlots technology in providing products and services while conserving soil and water resources for sustainable development.
机译：我们研究了相思树（Acacia crassicarpa），淡色银合欢（Leucaena pallida）和番泻叶（Senna siamea）的生长和水分利用，它们已经连续三年与田间作物一起建立和管理。第三年末，这些田地被休耕，以便树木生长并增加土壤肥力。在研究的不同时期监测树木的生长参数和存活率。通过使用热脉冲系统对三岁树上的树木蒸发的水量进行测量。所研究的物种建立了具有良好林分的有效林地，而景天树的生长速度最快。水分利用的结果表明，A。crassicarpa，L。pallida和S. siamea的日平均蒸腾量在350到1,700克之间，并且在很大程度上取决于茎的直径，树冠的大小和土壤水分的有效性。相思树在生长高度和根领直径方面表现出更好的表现，而淡色紫苏显示出更好的水分利用。结果对旋转林地技术在提供产品和服务的同时保护土壤和水资源以促进可持续发展的好处产生了影响。

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