| 水柏枝的根系特征及固沙效果研究 |
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| 引用本文： | 郭其强,郭连金,次仁旦增,卢杰.水柏枝的根系特征及固沙效果研究[J].安徽农业科学,2010,38(28):15786-15787,15789. |
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| 作者姓名： | 郭其强 郭连金 次仁旦增 卢杰 |
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| 作者单位： | [1]西藏农牧学院高原生态研究所,西藏林芝860000 [2]上饶师范学院,江西上饶334001 [3]西藏日喀则地区岗巴县农牧局,西藏岗巴857700 |
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| 基金项目： | 国家科技支撑项目，林业生态工程生态效益监测与碳汇计量技术专题子课题 |
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| 摘 要： | 目的]为西藏砂质土和河滩区水土保持林建设提供理论基础。方法]在西藏尼洋河滩区选取样地合标准木,采用整株挖掘法,每10cm为1层挖掘土壤,水冲法获取根系,测定不同级别根系的直径、长度和生物量。同时测定土样的有机质含量和土壤水稳性指数。结果]各级别根系总长度顺序为2级〉3级〉4级〉1级;生物量顺序为：1级〉2级〉3级〉4级,其中2级根系的伸展能力最强。随着土层深度增加,水柏枝根系的生物量和长度均减小。水柏枝林地土壤抗侵蚀性能小于绣线菊和连翘,大于荒坡地。水柏枝具有提高林下土壤有机质含量的作用。结论]水柏枝根系具有很好的固沙和保持水土的作用,可用于河滩区营造水土保持林。
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| 关 键 词： | 水柏枝 根系特征 固沙效果 |
Study on Root Characteristics and Sand-fixing Effects of Myricaria paniculata |
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| Institution: | GUO Qi-qiang et al (Plateau Ecology Institute of Tibet Agricultural and Animal Husbandry College, Linzhi, Tibet 860000) |
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| Abstract: | Objective]The study was to provide the theoretical basis for soil and water conservation forest plantation in Tibet sandy soil and riffle area.Method]Sample plot and sample tree were selected in Niyang riffle area.The soils were excavated by using whole plant excavation,10 cm per soil layer.The roots were got by water jetting.The diameter,length and biomass of the root in different classes were determined,and the organic matter content and soil stability index of the sample soil were determined.Results]The total length of the root in different class in order was 2>3>4>1.The biomass of the root in different class in order was 1>2>3>4.The protrusile capable of the 2 class roots was the strongest.The biomass and length of Myricaria paniculata root were reduced with the increase of soil depth.The soil antierosion property of M.paniculata forest was less than that of Spiraea trilobata Linn and Forsythia suspensa Vahl,but greater than that of waste-slope-land.M.paniculata could increase the organic matter content in the soil under forest.Conclusion]M.paniculata had good function on sand fixing and soil and water conservation.It could be used to plant soil and water conservation forest in riffle area. |
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| Keywords: | Myricaria paniculata Root characteristics Sand fixing effect |
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