doi︰10.16473/ki.xblykx1972.2023.04.002景谷县思茅松人工林土壤养分特征与肥力评价∗杨斌1,2,王家学3,郭小玮2,4,景跃波1,2,姜远标1,2(1.云南省林业和草原科学院,云南 昆明650201;2.国家林业草原思茅松工程技术研究中心,云南 昆明650201;3.云南云景林业开发有限公司,云南 普洱665499;4.普洱市林业和草原科学研究所,云南 普洱665000)摘要:思茅松是云南重要的乡土材、脂两用树种,为了解人工林的土壤养分状况,为思茅松栽培的立地选择、土壤管理及经营措施的制定提供参考依据。
以景谷县永平、凤山、民乐和小景谷等乡镇的8个有代表性的思茅松人工林林分为研究对象,采集土壤样品,测定pH 值、有机质、碱解氮、有效磷、速效钾、全氮、全磷、全钾8个指标,采用模糊综合评价法计算土壤肥力综合指数。
结果显示:思茅松人工林林地土壤养分指标的变异系数为36.4%~82.4%,其中有效磷的变异系数最大,有机质、碱解氮、速效钾、全氮、全磷、全钾为中等变异的养分因子;有机质、速效钾含量处于中等水平,碱解氮、全氮、全磷、全钾含量处于缺乏水平,有效磷处于极缺乏水平;8个思茅松人工林林分的土壤肥力综合指数0.1~0.7,平均值为0.337,土壤肥力处于缺乏水平,土壤肥力综合指数排序依次为独水井>文朗>茂密>黄果营>老鹰窝>小景谷>马打滚>大团山。
研究结果表明:景谷县思茅松种植基地人工林土壤总体处于低肥力水平,氮和磷是影响土壤肥力水平的主要限制因子。
关键词:思茅松;土壤肥力;养分评价;模糊数学中图分类号:S 791.259;S 714 文献标识码:A 文章编号:1672-8246(2023)04-0007-06Soil Nutrient Characteristics and Fertility Evaluation of Pinus kesiyangbianensis Plantations in Jinggu CountyYANG Bin 1,2,WANG Jiaxue 3,GUO Xiaowei 2,4,JING Yuebo 1,2,JIANG Yuanbiao 1,2(1.Yunnan Academy of Forestry and Grassland,Kunming Yunnan 650201,P.R.China;2.National Forestry and Grassland Engineering Research Center for Simao Pine,Kunming Yunnan 650201,P.R.China;3.Yunnan Yunjing Forestry Development Co.Ltd.,Pu’er Yunnan 666499,P.R.China;4.Forestry and Grassland Research Institute of Pu'er Municipality,Pu’er Yunnan 665000,P.R.China)Abstract :Pinus kesiya ngbianensis is an important tree species with dual function of timber and resin indige⁃nous to Yunnan province of China.This study was conducted to learn the soil fertile status of Pinus kesiya ngbianensis plantations,and to provide references for planting site selection,soil and stand management of this species.Soil samples were collected from 8Pinus kesiya ngbianensis plantations in Yongping,Fengshan,Minle and Xiaojinggu of Jinggu county,eight soil indexes were examined including pH value,organic matter(OM),availa⁃ble nitrogen(AN),available potassium(AK),total nitrogen(TN),total phosphorus(TP)and total potassium(TK),and the soil integrated fertility index was calculated.The results showed that the variable coefficient of 8nutrient contents was 36.4%-82.4%in the region,the variation of AP was the biggest,while the variation of OM,AN,AK,TN,TP and TK were moderate.The contents of OM and AK were at the medium level,the contents of AN,TN,TP and TK were at the poor level,the content of AP was at very poor level.The soil integrated fertility index(IFI)in the 第52卷 4期 2023年8月西 部 林 业 科 学Journal of West China Forestry ScienceVol.52 No.4 Aug .2023 ∗收稿日期:2023-01-17 基金项目:云南省创新团队项目(202105AE160008)。
