南方丘陵山地泡桐人工林的土壤肥力  

Soil Fertility of Paulownia Plantations in Southern Hilly Mountain Areas

作　　者：庞宏东[1] 王瑞文[1] 杨佳伟 黄颖[1] 李玲[1] Pang Hongdong;Wang Ruiwen;Yang Jiawei;Huang Ying;Li Ling(Hubei Academy of Forestry,Wuhan 430075,P.R.China)

机构地区：[1]湖北省林业科学研究院,武汉430075

出　　处：《东北林业大学学报》2025年第1期128-133,146,共7页Journal of Northeast Forestry University

基　　金：“十四五”国家重点研发计划项目(2022YFD220030503)。

摘　　要：以南方丘陵山地泡桐人工林为研究对象,按照全国第二次土壤普查分级标准对南方丘陵山地泡桐人工林土壤养分整体情况进行评级,并采用主成分分析法对南方丘陵山地泡桐人工林土壤肥力进行综合评价。结果表明:南方丘陵山地泡桐人工林土壤的全氮、碱解氮的平均质量分数分别为1.21 g·kg^(-1)、113.66 mg·kg^(-1),整体处于中上等级水平;全钾、速效钾、有机质的平均质量分数分别为13.07 g·kg^(-1)、68.17 mg·kg^(-1)、18.50 g·kg^(-1),整体处于中下等级水平;全磷平均质量分数为0.35 g·kg^(-1),整体处于低水平等级;有效磷的平均质量分数为2.68 mg·kg^(-1),整体处于很低等级水平。主成分分析结果表明:南方丘陵山地泡桐人工林的土壤综合肥力得分范围为-1.97~2.59,利用聚类分析法,可将115个样地土壤肥力划分为极高、高、中、低4个等级,各等级样地所占比例分别为6.09%、31.30%、43.48%、19.13%,说明土壤综合肥力以中等水平为主。不同种植区之间,土壤综合肥力差异较大,其中湖北省京山市、荆门市、钟祥市、咸宁市,泡桐人工林的土壤综合肥力整体水平最高;而湖北省崇阳县土壤综合肥力整体水平最差。This study focuses on Paulownia plantations in the southern hilly mountainous areas, evaluating the overall soil nutrient status according to the grading standards of the National Second Soil Survey and employing principal component analysis for a comprehensive assessment of soil fertility. The results showed that the average mass fractions of total nitrogen and alkali-hydrolyzed nitrogen in the soil of Paulownia plantations are 1.21 g·kg^(-1) and 113.66 mg·kg^(-1) , respectively, placing them in the upper-middle grade level. The average mass fractions of total potassium, available potassium, and organic matter are 13.07 g·kg^(-1) , 68.17 mg·kg^(-1) , and 18.50 g·kg^(-1) , respectively, which fall into the lower-middle grade level. The average mass fraction of total phosphorus is 0.35 g·kg^(-1) , indicating a low grade level overall. The average mass fraction of available phosphorus is 2.68 mg·kg^(-1) , classifying it in a very low grade level. Principal component analysis shows that the comprehensive soil fertility score for Paulownia plantations ranges from -1.97 to 2.59. Using cluster analysis, the 115 sampling sites can be categorized into four levels of soil fertility: extremely high, high, medium, and low, with the percentages of sites in each category being 6.09%, 31.30%, 43.48%, and 19.13%, respectively, indicating that the predominant level of comprehensive soil fertility is moderate. There is considerable variation in soil fertility among different planting areas, with the highest overall levels found in the Paulownia plantations of Jingshan City, Jingmen City, Zhongxiang City and Xianning City in Hubei Province, while the lowest overall soil fertility is observed in Chongyang County, Hubei Province.

关 键 词：泡桐 土壤肥力 主成分分析 

分 类 号：S792.43[农业科学—林木遗传育种] S714.8[农业科学—林学]