[1] TRANGMAR B B, YOST R S, UEHARA G. Application of geostatistics to spatial studies of soil properties[J]. Adv Agron, 1986, 38:45-94.
[2] 贺志龙, 张芸香, 郭跃东, 等.不同密度华北落叶松林天然林土壤养分特征研究[J].生态环境学报, 2017, 26(1):43-48.

HE Zhilong, ZHANG Yunxiang, GUO Yuedong, et al. Soil nutrient characteristics of natural Larix principis-rupprechtii in different stand density[J]. Ecol Environ Sci, 2017, 26(1):43-48.
[3] 张红桔, 马闪闪, 赵科理, 等.山核桃林地土壤肥力状况及其空间分布特征[J].浙江农林大学学报, 2018, 35(4):664-673.

ZHANG Hongju, MA Shanshan, ZHAO Keli, et al. Soil fertility and its spatial distribution for Carya cathayensis stands in Lin'an, Zhejiang Province[J]. J Zhejiang A&F Univ, 2018, 35(4):664-673.
[4] JOHN R, DALLING J W, HARMS K E, et al. Soil nutrients influence spatial distributions of tropical tree species[J]. Proc Natl Acad Sci USA, 2007, 104(3):864-869.
[5] 王华, 陈莉, 宋敏, 等.喀斯特常绿叶阔叶混交林土壤磷钾养分空间异质性[J].生态学报, 2017, 37(24):8285-8293.

WANG Hua, CHEN Li, SONG Min, et al. Spatial heterogeneity of soil phosphorous and potassium in a mixed evergreen and deciduous broad-leaved forest in karst region of southwest China[J]. Acta Ecol Sin, 2017, 37(24):8285-8293.
[6] HALL S J, MARCHAND P J. Effects of stand density on ecosystem properties of subalpine forests in the southern Rocky Mountains, USA[J]. Ann For Sci, 2010, 67(1):102.
[7] 王春胜.西南桦人工中幼林密度效应和秀芝研究[D].北京: 中国林业科学研究院, 2015.

WANG Chunsheng. Studies on the Effect of Planting Density and Srtificial Pruning on Young and Middle Aged Betula alnoides[D]. Beijing: Chinese Academy of Forestry, 2015.
[8] 肖兴翠, 李志辉, 唐作钧, 等.林分密度对湿地松人工林养分循环速率和利用效率的影响[J].生态学杂志, 2013, 32(11):2871-2880.

XIAO Xingcui, LI Zhihui, TANG Zuojun, et al. Effects of stand density on nutrient cycling rate and use efficiency of Pinus elliottii plantation[J]. Chin J Ecol, 2013, 32(11):2871-2880.
[9] 刘骏, 杨清培, 余定坤, 等.细根对竹林-阔叶林界面两侧土壤养分异质性形成的贡献[J].植物生态学报, 2013, 37(8):739-749.

LIU Jun, YANG Qingpei, YU Dingkun, et al. Contribution of fine root to soil nutrient heterogeneity at two sides of the bamoo and broad-leaved forest interface[J]. Chin J Plant Ecol, 2013, 37(8):739-749.
[10] KUNHAMU T K, KUMAR B M, VISWANATH S. Does thinning affect litterfall, litter decomposition, and associated nutrient release in Acaia mangium stands of Kerala in peninsular India?[J]. Can J Res, 2009, 39:792-801.
[11] 董彬, 曹永富, 尉海东.杨树人工林凋落物养分归还功能研究[J].生态科学, 2011, 30(3):257-261.

DONG Bin, CAO Yongfu, WEI Haidong. Nutrient return of litterfall in a Populous tremuloides plantation[J]. Ecol Sci, 2011, 30(3):257-261.
[12] 孙千惠, 吴霞, 王媚臻, 等.林分密度对马尾松林林下物种多样性和土壤理化性质的影响[J].应用生态学报, 2018, 29(3):732-738.

SUN Qianhui, WU Xia, WANG Meizhen, et al. Effects of stand density on understory species diversity and soil physicochemical properties of Pinus massoniana plantation[J]. Chin J Appl Ecol, 2018, 29(3):732-738.
[13] FANG Xiangmin, CHRISTENSON L M, WANG Fangchao, et al. Pine caterpillar outbreak and stand density impacts on nitrogen and phosphorous dynamics and their stoichiometry in masson pine (Pinus massoniana) plantations in subtropical China[J]. Can J For Res, 2006, 46(5):601-609.
[14] SEDIO R A. From foraging to cropping:the transition to plantation forestry, and implications for wood supply and demand[J]. Unasylva, 2001, 52(20):24-32.
[15] TRUAX B, GAGNON D, FORTIER J, et al. Yield in 8-year-old hybrid poplar plantations on abandoned farmland along climatic and soil fertility gradients[J]. For Ecol Manage, 2012, 267:228-239.
[16] XI Benye, BLOOMBERG M. WATT M S, et al. Modeling growth response to soil water availability simulated by HYDRUS for a mature triploid Populus tomentosa plantation located on the north China plain[J]. Agric Water Manage, 2016, 176:243-254.
[17] 朱之悌.毛白杨遗传改良[M].北京:中国林业出版社, 2006.
[18] ZHU Jialei, BO Huijuan, LI Xuan, et al. Effect of soil water and nitrogen on the stand volume of four hybrid Populus tomentosa clones[J]. Forests, 2017, 8(7):250.
[19] SONIA C, MIREN D R, HUBERT S. Mixing effect on volume growth of Fagus sylvatica and Pinus sylvestris is modulated by stand density[J]. For Ecol Manage, 2013, 292:86-95.
[20] 鲍士旦.土壤农化分析[M].北京:中国农业出版社, 2000:14-111.
[21] KIRBY M J. A basis for soil profile modeling in a geomorphic context[J]. Soil Sci, 1985, 36:97-121.
[22] 戴奥娜, 刘肖肖, 王兵, 等.丝栗栲林下土壤有机碳及其组分的时空年变化特征[J].浙江农林大学学报, 2018, 35(3):405-411.

DAI Aona, LIU Xiaoxiao, WANG Bing, et al. Annual spatial and temporal variations of soil organic carbon and its components in Castanopsis fargesii[J]. J Zhejiang A&F Univ, 2018, 35(3):405-411.
[23] 杨晓娟, 王海燕, 刘玲, 等.东北过伐林区不同林分类型土壤肥力质量评价研究[J].生态环境学报, 2012, 21(9):1553-1560.

YANG Xiaojuan, WANG Haiyan, LIU Ling, et al. Evaluation of soil fertility quality under different forest stands in over-logged forest region, northeast China[J]. Ecol Environ Sci, 2012, 21(9):1553-1560.
[24] 牛小云, 孙晓梅, 陈东升, 等.辽东山区不同林龄日本落叶松人工林土壤微生物、养分及酶活性[J].应用生态学报, 2015, 26(9):2663-2672.

NIU Xiaoyun, SUN Xiaomei, CHEN Dongsheng, et al. Soil microorganisms, nutrients and enzyme activity of Larix kaempferi plantation under different ages in mountainous region of eastern Liaoning Province, China[J]. Chin J Appl Ecol, 2015, 26(9):2663-2672.
[25] 邱新彩, 彭道黎, 李伟丽, 等.北京市延庆区不同林龄油松人工林土壤理化性质[J].应用与环境生物学报, 2018, 24(2):221-229.

QIU Xincai, PENG Daoli, LI Weili, et al. Soil physicochemical properties of Pinus tabuliforms plantations of different ages in Yanqing, Beijing[J]. Chin J Appl Environ Biol, 2018, 24(2):221-229.
[26] BO Huijuan, WEN Chunyan, SONG Lianjun, et al. Fine-root responses of Populous tomentosa forests to stand density[J]. Forests, 2018, 9(9):562.
[27] 范少辉, 赵建诚, 苏文会, 等.不同密度毛竹林土壤质量综合评价[J].林业科学, 2015, 51(10):1-9.

FAN Shaohui, ZHAO Jiancheng, SU Wenhui, et al. Comprehensive evaluation of soil quality in Phyllostachys edulis stands of different stocking densities[J]. Sci Silv Sin, 2015, 51(10):1-9.
[28] 刘勇, 李国雷, 李瑞生, 等.密度调控对油松人工林土壤肥力的影响[J].西北林学院学报, 2008, 23(6):18-23.

LIU Yong, LI Guolei, LI Ruisheng, et al. Effected of tree density on soil fertility in Pinus tabulaeformis plantations[J]. J Northwest For Univ, 2008, 23(6):18-23.
[29] 任丽娜, 王海燕, 丁国栋, 等.林分密度对华北土石山区油松人工林土壤有机碳及养分特征的影响[J].干旱区地理, 2012, 35(3):456-464.

REN Lina, WANG Haiyan, DING Guodong, et al. Effects of Pinus tabulaeformis Carr. plantation density on soil organic carbon and nutrients characteristics in rocky mountain area of northern China[J]. Arid Land Geogr, 2012, 35(3):456-464.
[30] HERNANDEZ J, PINO A D, VANVE E D, et al. Eucalyputs and Pinus stand density effects on soil carbon sequestration[J]. For Ecol Manage, 2016, 368:28-38.
[31] YANAI R D, CURRIE W S, GOODALE L. Soil carbon dynamics after forest harvest:an ecosystem paradigm reconsidered[J]. Ecosystems, 2003, 6(3):197-212.