| 黄土丘陵区不同土地利用方式对土壤水分及地上生物量的影响 |
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| 引用本文： | 肖列,刘国彬,薛萐,张超.黄土丘陵区不同土地利用方式对土壤水分及地上生物量的影响[J].水土保持通报,2016,36(4):204-209,215. |
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| 作者姓名： | 肖列 刘国彬 薛萐 张超 |
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| 作者单位： | 1. 西安理工大学西北旱区生态水利工程国家重点实验室培育基地,陕西西安,710048;2. 西北农林科技大学水土保持研究所黄土高原土壤侵蚀与旱农业国家重点实验室,陕西杨凌712100;中国科学院水利部水土保持研究所,陕西杨凌712100;3. 西北农林科技大学水土保持研究所黄土高原土壤侵蚀与旱农业国家重点实验室,陕西杨凌,712100 |
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| 基金项目： | 中国科学院战略性先导科技专项“退耕还林（草）工程固碳速率和潜力研究”（XDA05060300）；西北农林科技大学基本科研业务费专项（ZD2013021）；陕西省科学技术研究发展计划项目（2011KJXX63） |
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| 摘 要： | 目的]研究不同土地利用方式下的土壤水分状况及其与植被群落特征的关系,为黄土丘陵区的植被恢复和重建提供理论依据。方法]采用野外调查的方法和数理统计分析方法开展研究。结果]纸坊沟流域主要植被类型的地上干生物量为310.0~10 036.2g/m2,平均地上干生物量由大到小依次为:林地灌木地农田人工草地天然草地。地上鲜生物量与株高存在极显著的正相关关系(R2=0.967 4,p0.01)。不同土地利用方式0—100cm土层土壤含水量较高,且土壤水分变异较大;100cm以下土壤含水量相对稳定,坝地玉米和梯田玉米的极易效水量分别为221.73和221.99mm;柠条和刺槐的土壤含水量最低,土壤水分类型为难效水,分别为311.44和333.09mm;其他6种土地利用方式的土壤水分为中效易效水。结论]黄土丘陵区人工林灌植被的种植导致深层土壤水分的大量消耗,不利于该区植被恢复和建设的可持续发展。
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| 关 键 词： | 土地利用方式 土壤水分 地上生物量 黄土丘陵区 |
| 收稿时间： | 2013/7/11 0:00:00 |
| 修稿时间： | 2013/9/14 0:00:00 |
Effects of Land Use Types on Soil Water and Aboveground Biomass in Loess Hilly Region |
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| XIAO Lie,LIU Guobin,XUE Sha and ZHANG Chao.Effects of Land Use Types on Soil Water and Aboveground Biomass in Loess Hilly Region[J].Bulletin of Soil and Water Conservation,2016,36(4):204-209,215. |
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| Authors: | XIAO Lie LIU Guobin XUE Sha and ZHANG Chao |
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| Institution: | State Key Laboratory Base of Eco-hydraulic Engineering in Arid Area, Xi''an University of Technology, Xi''an, Shaanxi 710048, China,State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China;Institute of Soil and Water Conservation, Chinese Academy of Science and Ministry of Water Resource, Yangling, Shaanxi 712100, China,State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China;Institute of Soil and Water Conservation, Chinese Academy of Science and Ministry of Water Resource, Yangling, Shaanxi 712100, China and State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China |
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| Abstract: | Objective] Soil moisture under different land use patterns were measured and its links with the characteristics of plant communities were studied to provide guidance for the vegetation restoration and rehabilitation. Methods] Based on field investigation, mathematical analysis was used. Results] The aboveground dry biomass of main vegetation in Zhifanggou watershed ranged from 310.0 to 10036.2 g/m2 among ten land use types, and the mean aboveground dry biomass ranked as: forest land >shrub land >farmland >artificial grassland>natural grassland. There was a significant positive correlation between aboveground fresh biomass and vegetation height(R2=0.967 4, p<0.01). Soil moisture in 0-100 cm of different land use types had high content and varied greatly. Comparatively, the soil moisture content in 100-500 cm was nearly constant. The amount of most easily available soil moisture in check-dam and terrace with Z. mays planted were 221.73 mm and 221.99 mm, respectively. The soil moistures in C. korshinskii and R. pseudoacacia were extremely low, with hardly-available soil moisture contents of 311.44 mm and 333.09 mm, respectively. Soil moistures in the other six land use types were classified as easily-moderately available soil moisture. Conclusion] In the loess hilly region, all vegetation types, to a certain extent, can improve local ecological environment, but some artificial forest and shrub can lead to the excessive consumption of deep soil moisture, and are not propitious to the sustainable development of vegetation. |
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| Keywords: | land use types soil moisture content aboveground biomass loess hilly region |
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