宁南山区土壤质量对人工植被恢复模式的响应  

Response of soil quality to artificial vegetation restoration patterns in hilly area of Southern Ningxia

作　　者：金晶炜[1,2] 苏纪帅[3] 白于[3] 井赵斌[3] 井光花[2] 程光庆 程积民[1,2] 

机构地区：[1]西北农林科技大学水土保持研究所,杨凌712100 [2]中国科学院水利部水土保持研究所,杨凌712100 [3]西北农林科技大学动物科技学院,杨凌712100

出　　处：《农业工程学报》2014年第16期283-289,共7页Transactions of the Chinese Society of Agricultural Engineering

基　　金：陕西省自然科学基金(K332021308);中国科学院人才培养计划项目(K318021220);农业部"现代农业产业技术体系建设专项"(CARS-35-40);国家自然科学基金重点项目(41230852);中央高校基本科研业务费专项资金-西北农林科技大学基本科研业务费专项基金项目(Z109021306);西北农林科技大学博士科研启动基金项目(Z109021108)

摘　　要：为了评价人工植被恢复模式对土壤质量的影响，该文以宁南山区7种人工植被恢复模式为研究对象，选取0～10和＞10～20 cm土层全氮、全磷、速效磷、速效钾、有机质、pH值和土壤含水量等指标作为土壤质量评价指标，应用灰色关联模型和聚类分析方法研究植被恢复对土壤质量的影响，确定最优植被恢复模式。结果表明，不同人工植被恢复模式对土壤质量有很大影响，与对照（农地）相比，恢复年限为5、10、15、20 a紫花苜蓿草地和恢复年限为30 a柠条林地均提高土壤质量，其中30 a柠条林地恢复效果最好。随着“退耕还林还草”的开展，在宁南山区，种植紫花苜蓿、建植柠条是较好的生态重建和植被恢复方式。研究结果为宁南山区植被和生态建设提供理论依据。Soil, as a vital natural resource, performs key environmental, economic, and social functions. High quality of soil not only produces better food and fiber, but also helps establish natural ecosystems and enhances air and water quality. Soil quality improvement is important for sustaining a global biosphere. Understanding the variability of soil quality is important in improving an ecological environment. Vegetation restoration played an important role in the ecological environment construction, and it could reduce the soil erosion and improve the soil quality. The hilly area of southern Ningxia, one of the soil erosion areas, was the key region of the conversion＆amp;nbsp;of cropland to forest and grassland and ecological construction. According to the complexity of the ecological environment in the hilly area of southern Ningxia, lots of vegetation restoration patterns had developed from the 1990s. Medicago sativa and Caragana microphylla were the main plant species in the vegetation restoration of this area. Some studies had also shown the variability of soil aggregate content and soil microorganisms under different artificial vegetation restoration patterns in the hilly area of southern Ningxia. However, little attention had been paid to the effects of vegetation restoration patterns on soil quality using a mathematical model. The objective of this research is to explore the response of soil quality to artificial vegetation restoration patterns in the hilly area of southern Ningxia. In this paper, soil samples were taken in 0-10 and 〉10-20 cm soil layers under seven artificial patterns. Soil samples were air-dried, divided, and passed through a 2-mm nylon sieve for measuring soil available phosphorus, available potassium, and soil pH value. Part of the air-dried and sieved samples were grounded and passed through either a 1-mm or a 0.25-mm nylon sieve for determining soil total nitrogen, total phosphorus, and organic matter. The soil organic matter and total nitrogen were determined using the potassium dic

关 键 词：土壤 植被 聚类分析 宁南山区 人工植被恢复模式 灰色关联模型 

分 类 号：S157.1[农业科学—土壤学]