沙地植被恢复不同结构湿地松林分土壤养分效应及综合评价  

The separate effects of soil nutrients and comprehensive evaluation of different structure of Pinus elliottii forests during sand vegetation restoration

作　　者：王胤娣 吴春生[1] 刘苑秋[1] 李晓东[1] 晏伟明 

机构地区：[1]江西农业大学,江西南昌330045

出　　处：《南方林业科学》2015年第3期22-27,共6页South China Forestry Science

基　　金："赣鄱英才555工程"领军人才培养计划;国家自然科学基金项目(编号:30960312)支助

摘　　要：由于历史原因、自然因素和人为干扰,鄱阳湖区土地风沙化问题成为南方生态环境突出问题之一,为揭示湿地松在沙地植被恢复中的土壤养分效应,在江西南昌县岗上镇风沙化综合治理示范区为试验点,以不同结构湿地松林分为研究对象,并以裸沙地为对照,分别在湿地松+灌+草、湿地松+草、湿地松纯林林分及裸沙对照地内各设立3个面积为20 m×20 m的样地,调查测定不同结构湿地松林主要养分含量,并通过灰色关联度分析,对不同结构湿地松林土壤养分进行综合评价。结果表明:湿地松+灌+草能够显著提高土壤的养分含量,灰色关联度为0.923,土壤肥力最高,湿地松+草除了对土壤全钾的含量没有显著影响,对其他养分含量均有显著提高,灰色关联度为0.612,土壤肥力一般。湿地松纯林土壤的有效磷、速效钾含量显著低于裸沙地,灰色关联度为0.485,土壤肥力较差。结果表明,湿地松林+灌+草土壤肥力最高,表明湿地松林+灌+草结构的配置对改善沙地土壤养分效果较其他两种林分结构最佳。Due to historical reasons, the natural factors and human interference, sandy land issue at Poyang Lake area has become one of the outstanding problems south of ecological environment, Pinus elliottii is the main species of sand control.To reveal the soil nutrient effect in sandy vegetation restoration, taking desertificated comprehensive management emonstration area in the Gangshang Town of Nanchang County of Jiangxi Province as the test point, and different structures of P. elliottii as study object, and bare sand as a control, three sample of 20 m ×20 m were set up in P. elliottii ＋ shrub ＋grass, P. elliottii ＋ grass, P. elliottii pure forests and control of bare sand, respectively, the main nutrient content in different structure of P. elliottii forests was determined, and through the grey correlation analysis, comprehensive evaluation was made on soil nutrient of different structure of P. elliottii forests. The results showed that P. elliottii ＋ shrub ＋ grass can significantly improve the soil nutrient content, the gray correlation degree of 0.923, with highest soil fertility; P. elliottii ＋ grass except has no significant effect on soil total potassium content, but other nutrient content were significantly improved, gray correlation degree of 0.612, soil fertility in general. The phosphorus, potassium content of P. elliottii pure forest soil was significantly lower than that of bare sand, gray correlation degree of 0.485, poor soil fertility. The results showed that the P. elliottii ＋shrub ＋ grass has highest soil fertility, indicating that the effect of P. elliottii ＋ shrub ＋ grass configuration structure improving sandy soil nutrients was better than the other two forest structure.

关 键 词：沙地 不同结构湿地松林 土壤养分 灰色关联度 

分 类 号：S714[农业科学—林学] S791.246