摘要
为了准确、及时地把握公益林资源的数量、质量、空间分布及其利用状况,更加有效地指导相关部门加强公益林的建设与保护,采用固定样地法对额济纳旗国家公益林进行了动态监测与评价。结果表明:(1)额济纳旗国家级公益林胡杨和柽柳群落盖度平均增加2.69%、梭梭降低1.89%、白刺降低0.30%、沙拐枣降低0.42%。(2)胡杨、柽柳和白刺群落生物量均有不同程度的增加,平均生物量增加4.26kg;梭梭和沙拐枣群落生物量均有所减少,其中梭梭减少2.26kg,沙拐枣减少2.77kg。(3)额济纳旗7种主要植物群落的Margalef丰富度指数2014年介于0.251 9~1.701 5之间,平均值为0.963 0,相比2010年的0~1.8的值区间有较大幅度的增加,Shannon-Wiener多样性指数主要物种均有增加。Simpson优势度指数沙拐枣有减小趋势,减幅均接近于0.03。其余植物群落均有增加。Pielou均匀度指数大多物种均呈增加趋势,尤以白刺增幅最大。(4)额济纳旗胡杨和柽柳群落中离子含量较2010年均有所减少,且二者均是SO_4^(2-)减幅最大,分别为1.755g·kg^(-1)和2.688g·kg^(-1);梭梭群落阴离子含量呈增加趋势。(5)额济纳旗国家公益林综合效益增长19.04亿元,年均增长3.81亿元。
In order to ascertain quantity,quality,spatial distribution and utilizing status of non-commercial forest accurately and timely,to guide the relevant departments to strengthen the construction and protection of the national non-commercial forest,an dynamic monitoring and evaluation of Ejina Banner＇s national non-commercial forest were carried out.Result shows that：（1）Populus euphratica and Tamarix chinensis community coverage increased by an average of 2.69%,Haloxylon ammosdendron decrease by 1.89%,Nitraria tangutorum decrease by 0.30%,Calligonum mongolicum decrease by 0.42%;（2）Populus euphratica,Tamarix chinensis and Nitraria tangutorum community biomass increased by different degrees,the average biomass increase by 4.26kg;biomass of Haloxylon ammosdendron Calligonum mongoliumcommunities were reduced,Haloxylon ammosdendronreduce by 2.26 kg,Calligonum mongolicumreduce by 2.77kg;（3）Margalef richness index with the average value 0.9630 of seven predominant plan communities in Ejina Banner is between 0.2519 1.7015 in 2014,compared to the 0-1.8interval of2010 has a larger increase.Shannon-Weiner diversity index of major species has increased,the Simpson＇s dominance index of plant communities increased except Calligonum mongolicum,reduce close to 0.03.Pielou evenness index show an increasing trend in most species,especially Nitraria tangutorum;（4）The ion content has been reduced than2010 of Ejina Banner＇s Populus euphratica Tamarix chinensis community,and largest decrease of all two are SO_4^（2-）,the amplitude of decreasing are 1.755g·kg^（-1） 2.688g·kg^（-1）;the anion content of Haloxylon ammosdendron community show an increasing trend.（5）The comprehensive benefit of Ejina Banner＇s national non-commercial forest increase by$1.904 billion,the average annual increase of$0.38 billion.
出处
《防护林科技》
2017年第1期42-47,52,共7页
Protection Forest Science and Technology
关键词
公益林
效益评价
额济纳旗
forest for public benefit
benefit evaluation
Ejina Banner
