沙质海岸防护林下土壤养分特征研究  

Research on Soil Nutrient Characteristics under Sandy Coastal Shelterbelts

作　　者：任奕炜 衣华鹏 钟小瑛 Ren Yiwei;Yi Huapeng;Zhong Xiaoying(College of Resources and Environmental Engineering,Ludong University,Yantai 264025,Shandong)

机构地区：[1]鲁东大学资源与环境工程学院,山东烟台264025

出　　处：《防护林科技》2022年第5期1-6,28,共7页Protection Forest Science and Technology

基　　金：国家自然科学基金项目(31000197,41171424)。

摘　　要：以烟台市海岸带防护林下土壤为研究对象,采集不同区域海防林下0~20 cm的土壤对其pH、有机质、碱解氮、速效磷、速效钾等5项指标进行室内测定和分析,结合土壤分级评价标准,运用修正的内梅罗指数法、主成分分析法,对土壤肥力进行评价,对各养分之间的相关性进行研究。结果表明:烟台市海防林下土壤pH平均值6.16,整体呈微酸性;土壤有机质平均含量为11.1 mg·kg^(-1),有机质含量整体偏低;土壤碱解氮含量全部处在极缺水平;土壤速效磷含量的平均值为2.9 mg·kg^(-1),整体处于缺乏的水平;土壤速效钾平均含量109.66 mg·kg^(-1),整体达到中级水平。烟台市海岸带防护林总体土壤养分综合指数为1.17,为三级(一般),结合土壤肥力综合得分的结果,烟台市海防林下土壤养分较缺乏。烟台海岸带防护林应关注水肥流失问题,适量添加氮肥、磷肥缓解养分的缺乏。结合不同区域的实际情况,将芝罘区、莱山区海岸带防护林作为重点区域进行管理,实现海防林可持续发展。The 0-20 cm soil under coastal shelterbelts in Yantai city were collected to determine pH,organic matter,alkali-hydrolyzed nitrogen,available phosphorus,available potassium and other five indexes in the laboratory.Combined with soil grading evaluation standard,the modified Nemerow index method and principal component analysis were used to evaluate soil fertility and correlation between various nutrients.The results showed that the average pH value was 6.16,which was slightly acidic.The average soil organic matter content was 11.1 mg·kg^(-1),and the overall organic matter content was low.The content of alkali-hydrolyzed nitrogen in soil was extremely low.The average available phosphorus content was 2.9 mg·kg^(-1),which was in the deficient level.The average soil available potassium content was 109.66 mg·kg^(-1),which reached the intermediate level.The overall soil nutrient comprehensive index of Yantai was 1.17,which was level 3(general).Combined with the results of soil fertility scores,the soil nutrient under the shelter forests of Yantai coastal zone was relatively scarce.Water and fertilizer loss should be paid attention,nitrogen and phosphorus fertilizer should be added appropriately to alleviate nutrient deficiency.Combined with the actual situation of different regions,Zhifu and Laishan coastal shelter forests of will be managed as key regions to achieve sustainable development.

关 键 词：海岸带防护林 土壤养分综合指数 内梅罗指数 主成分分析 土壤肥力 

分 类 号：S728.36[农业科学—林木遗传育种]