[1] 卢立华, 农友, 李华, 等. 保留密度对杉木人工林生长和生物量及经济效益的影响[J]. 应用生态学报, 2020, 31(3): 717 − 724.

LU Lihua, NONG You, LI Hua, et al. Effects of retention density on growth, biomass, and economic benefit of Cunninghamia lanceolata plantation [J]. Chinese Journal of Applied Ecology, 2020, 31(3): 717 − 724.
[2] 李晓燕, 段爱国, 张建国, 等. 不同良种与初植密度杉木林分密度指标动态特征[J]. 林业科学研究, 2021, 34(2): 72 − 80.

LI Xiaoyan, DUAN Aiguo, ZHANG Jianguo, et al. Dynamic characteristics of stand density measure of Chinese fir (Cunninghamia lanceolata) plantations with different improved varieties and initial planting densities [J]. Forest Research, 2021, 34(2): 72 − 80.
[3] 王玲. 林分密度对油松人工林群落结构和植物多样性的影响[J]. 生态环境学报, 2020, 29(12): 2328 − 2336.

WANG Ling. Effects of different stand densities on community structure and species diversity of Pinus tabulaeformis plantation [J]. Ecology and Environmental Sciences, 2020, 29(12): 2328 − 2336.
[4] 陈贝贝, 姜俊, 陆元昌, 等. 间伐强度对马尾松人工林冠下套种树种生长的影响[J]. 北京林业大学学报, 2021, 43(1): 58 − 65.

CHEN Beibei, JIANG Jun, LU Yuanchang, et al. Effects of thinning intensity on the growth of interplanting broadleaved trees under Pinus massoniana plantation [J]. Journal of Beijing Forestry University, 2021, 43(1): 58 − 65.
[5]

WANG Yueting, JIA Xiang, CHAI Guoqi, et al. Improved estimation of aboveground biomass of regional coniferous forests integrating UAV-LiDAR strip data, Sentinel-1 and Sentinel-2 imageries[J/OL]. Plant Methods, 2023, 19(65) [2023-11-10]. doi: 10.1186/s13007-023-01043-9.
[6]

ANDRZEJ M, JAGODZIŃSKI, DYDERSKI M K, et al. Effects of stand features on aboveground biomass and biomass conversion and expansion factors based on a Pinus sylvestris L. chronosequence in western Poland [J]. European Journal of Forest Research, 2019, 138: 673 − 683.
[7] 方怡然, 蔡金桓, 薛立. 3种改造人工林的林下植物多样性和土壤物理性质[J]. 华南农业大学学报, 2018, 39(4): 87 − 92.

FANG Yiran, CAI Jinhuan, XUE Li. Undergrowth plant diversity and soil physical properties in three reformed plantations [J]. Journal of South China Agricultural University, 2018, 39(4): 87 − 92.
[8] 王岩松, 马保明, 高海平, 等. 晋西黄土区油松和刺槐人工林土壤养分及其化学计量比对林分密度的响应[J]. 北京林业大学学报, 2020, 42(8): 81 − 93.

WANG Yansong, MA Baoming, GAO Haiping, et al. Response of soil nutrients and their stoichiometric ratios to stand density in Pinus tabuliformis and Robinia pseudoacacia plantations in the loess region of western Shanxi Province, Northern China [J]. Journal of Beijing Forestry University, 2020, 42(8): 81 − 93.
[9] 董威, 刘泰瑞, 覃志杰, 等. 不同林分密度油松天然林土壤理化性质及微生物量碳氮特征研究[J]. 生态环境学报, 2019, 28(1): 65 − 72.

DONG Wei, LIU Tairui, TAN Zhijie, et al. Research on the characteristics of soil physicochemical properties and microbial biomass carbon and nitrogen in natural Pinus tabulaeformis forests with different stand densities [J]. Ecology and Environmental Sciences, 2019, 28(1): 65 − 72.
[10]

PEICHL M, LEAVA N A, KIELY G. Above- and belowground ecosystem biomass, carbon and nitrogen allocation in recently afforested grassland and adjacent intensively managed grassland [J]. Plant &Soil, 2012, 350(1/2): 281 − 296.
[11]

KONG Weibo, YAO Yufei, ZHAO Zhongna, et al. Effects of vegetation and slope aspect on soil nitrogen mineralization during the growing season in sloping lands of the Loess Plateau [J]. Catena, 2019, 172: 753 − 763.
[12] 杨学亭, 樊军, 盖佳敏, 等. 祁连山不同类型草地的土壤理化性质与植被特征[J]. 应用生态学报, 2022, 33(4): 878 − 886.

YANG Xueting, FAN Jun, GE Jiamin, et al. Soil physical and chemical properties and vegetation characteristics of different types of grassland in Qilian Mountains, China [J]. Chinese Journal of Applied Ecology, 2022, 33(4): 878 − 886.
[13]

ZHANG Yunxiang, LIU Tairui, GUO Jingping, et al. Changes in the understory diversity of secondary Pinus tabulaeformis forests are the result of stand density and soil properties[J/OL]. Global Ecology and Conservation, 2021, 28: e01628 [2023-11-10]. doi: 10.1016/j.gecco.2021.e01628.
[14] 李雪, 王静, 张静, 等. 林龄和林分密度对华北落叶松人工林土壤养分和细菌群落的影响[J]. 中南林业科技大学学报, 2022, 42(10): 83 − 92.

LI Xue, WANG Jing, ZHANG Jing, et al. Effects of stand age and stand density on the soil nutrient and bacterial community of Larix principis-rupprechtii plantation [J]. Journal of Central South University of Forestry &Technology, 2022, 42(10): 83 − 92.
[15] 吴茜, 傅红, 郝建锋, 等. 林分密度对四川云顶山柏木人工林林下植被种间关联的影响[J]. 应用与环境生物学报, 2023, 29(4): 922 − 932.

WU Qian, FU Hong, HAO Jianfeng, et al. Effect of stand density on interspecific association with under-canopy planting of Cupressus funebris plantation on Yunding Mountain in Sichuan, China [J]. Chinese Journal of Applied and Environmental Biology, 2023, 29(4): 922 − 932.
[16]

CHEN Yunming, CAO Yang. Response of tree regeneration and understory plant species diversity to stand density in mature Pinus tabulaeformis plantations in the hilly area of the Loess Plateau, China [J]. Ecological Engineering, 2014, 73: 238 − 245.
[17] 何如梦, 王百田, 于显威, 等. 晋西黄土区油松林的生长释放与生长抑制[J]. 应用与环境生物学报, 2018, 24(6): 1204 − 1210.

HE Rumeng, WANG Baitian, YU Xianwei, et al. Growth release and growth inhibition of Pinus tabulaeformis forest in the Loess Plateau of western Shanxi Province, China [J]. Chinese Journal of Applied and Environmental Biology, 2018, 24(6): 1204 − 1210.
[18] 云慧雅, 毕华兴, 焦振寰, 等. 晋西黄土区不同林分类型和密度条件下林下灌草组成及多样性特征[J]. 浙江农林大学学报, 2023, 40(3): 569 − 578.

YUN Huiya, BI Huaxing, JIAO Zhenhuan, et al. Composition and diversity of understory plants under different stand types and densities in loess region of western Shanxi Province [J]. Journal of Zhejiang A&F University, 2023, 40(3): 569 − 578.
[19] 刘俊廷, 张建军, 王恒星, 等. 晋西黄土区不同退耕年限油松林草本多样性与土壤养分的关系[J]. 干旱区研究, 2020, 37(2): 400 − 409.

LIU Junting, ZHANG Jianjun, WANG Hengxing, et al. Relationship between species diversity at the herbaceous stratum and soil nutrients in Pinus tabulaeformis plantations of various ages on the Loess Plateau of western Shanxi Province, China [J]. Arid Zone Research, 2020, 37(2): 400 − 409.
[20] 余新晓, 吴岚, 饶良懿, 等. 水土保持生态服务功能评价方法[J]. 中国水土保持科学, 2007(2): 110 − 113.

YU Xinxiao, WU Lan, RAO Liangyi, et al. Assessment methods of ecological functions of soil and water conservation measures [J]. Science of Soil and Water Conservation, 2007(2): 110 − 113.
[21]

WANG L N, ZHU Q K, ZHAO W J, et al. The drought trend and its relationship with rainfall intensity in the Loess Plateau of China [J]. Natural Hazards, 2015, 77(1): 479 − 495.
[22] 何如梦. 晋西黄土区人工油松林生长对干旱的响应[D]. 北京: 北京林业大学, 2021.

HE Rumeng. The Growth of Pinus tabulaeformis Plantation Response to Drought in Loess Region of Western Shanxi Province[D]. Beijing: Beijing Forestry University, 2021.
[23]

WGIEL A, BIELINIE E, POLOWY K. The stock and content of micronutrients in aboveground biomass of Scots pine stands of different densities [J]. Journal of Elementology, 2019, 24(2): 615 − 628.
[24] 赵晓雪, 饶良懿, 申震洲. 砒砂岩区不同地形位置土壤物理性质分异特征[J]. 应用与环境生物学报, 2020, 26(6): 1359 − 1368.

ZHAO Xiaoxue, RAO Liangyi, SHEN Zhenzhou. Heterogeneous characteristics of soil physical properties of different terrain locations in the Pisha sandstone area [J]. Chinese Journal of Applied and Environmental Biology, 2020, 26(6): 1359 − 1368.
[25] 鲁如坤. 土壤农业化学分析方法[M]. 北京: 中国农业科技出版社, 2000.

LU Rukun. Methods of Soil Agrochemical Analysis [M]. Beijing: China Agricultural Science and Technology Press, 2000.
[26] 韩新生, 许浩, 郭永忠, 等. 六盘山西侧华北落叶松林密度对生长和林分蓄积的影响[J]. 甘肃农业大学学报, 2023, 58(2): 169 − 179.

HAN Xinsheng, XU Hao, GUO Yongzhong, et al. Influence of stand density on growth and stand volume of Larix principis-rupprechtil plantations on the west side of Liupan Mountain [J]. Journal of Gansu Agricultural University, 2023, 58(2): 169 − 179.
[27]

FAROOQ H T, WU Wenjing, TIGABU M, et al. Growth, biomass production and root development of Chinese fir in relation to initial planting density[J/OL]. Forests, 2019, 10(3): 236 [2023-11-10]. doi: 10.3390/f10030236.
[28]

TUN N T, GUO Jiao, FANG Shengzuo, et al. Planting spacing affects canopy structure, biomass production and stem roundness in poplar plantations [J]. Scandinavian Journal of Forest Research, 2018, 33(5): 464 − 474.
[29] 公宁宁, 王小平, 李皓, 等. 北京地区40年生油松人工林密度效应的研究[J]. 林业资源管理, 2014(4): 85 − 91.

GONG Ningning, WANG Xiaoping, LI Hao, et al. Management density effects of Pinus tabulaeformis plantation in Beijing [J]. Forest Resources Management, 2014(4): 85 − 91.
[30]

TSAMIR M, GOTTLIEB S, PREISLER Y, et al. Stand density effects on carbon and water fluxes in a semi-arid forest, from leaf to stand-scale[J/OL]. Forest Ecology and Management, 2019, 453: 117573 [2023-11-10]. doi: 10.1016/j.foreco.2019.117573.
[31]

BAI Yanfeng, SHEN Yangyang, JIN Yunduo, et al. Selective thinning and initial planting density management promote biomass and carbon storage in a chronosequence of evergreen conifer plantations in Southeast China[J/OL]. Global Ecology and Conservation, 2020, 24: e01216 [2023-11-10]. doi: 10.1016/j.gecco.2020.e01216.
[32] 宋爱云, 董林水, 周金星, 等. 晋西黄土丘陵边缘区油松人工林密度调控与生物量特征[J]. 西北林学院学报, 2016, 31(4): 7 − 11, 66.

SONG Aiyun, DONG Linshui, ZHOU Jinxing, et al. Suitable density management and biomass characters of Pinus tabulaeformis plantations in the ecotone between bedrock region and loess hill area of West Shanxi Province [J]. Journal of Northwest Forestry University, 2016, 31(4): 7 − 11, 66.
[33] 简永旗, 吴家森, 盛卫星, 等. 间伐和林分类型对森林凋落物储量和土壤持水性能的影响[J]. 浙江农林大学学报, 2021, 38(2): 320 − 328.

JIAN Yongqi, WU Jiasen, SHENG Weixing, et al. Effects of thinning and stand types on litter stock and soil water-holding capacity [J]. Journal of Zhejiang A&F University, 2021, 38(2): 320 − 328.
[34] 王立超, 夏江宝, 赵玉尧, 等. 密度调控对鲁北黄泛平原区人工林土壤物理性质及植物多样性的影响[J]. 水土保持通报, 2022, 42(3): 43 − 48, 56.

WANG Lichao, XIA Jiangbao, ZHAO Yuyao, et al. Effects of plant density regulation on soil physical properties and plant diversity of plantations in Yellow River Flood Plain of northern Shandong Province [J]. Bulletin of Soil and Water Conservation, 2022, 42(3): 43 − 48, 56.
[35] 于洋, 卫伟, 陈利顶, 等. 黄土丘陵区坡面整地和植被耦合下的土壤水分特征[J]. 生态学报, 2016, 36(11): 3441 − 3449.

YU Yang, WEl Wei, CHEN Liding, et al. Coupling effects of different land preparation and vegetation on soil moisture characteristics in a semi-arid loess hilly region [J]. Acta Ecologica Sinica, 2016, 36(11): 3441 − 3449.
[36] 卜瑞瑛, 梁文俊, 魏曦, 等. 不同林分密度华北落叶松林的土壤养分特征[J]. 森林与环境学报, 2021, 41(2): 140 − 147.

BU Ruiying, LlANG Wenjun, WEI Xi, et al. Soil nutrient characteristics of Larix principis-rupprechtii forest with different stand densities [J]. Journal of Forest and Environment, 2021, 41(2): 140 − 147.
[37]

QIU Xincai, WANG Haibin, PENG Daoli, et al. Thinning drives C: N: P stoichiometry and nutrient resorption in Larix principis-rupprechtii plantations in North China[J/OL]. Forest Ecology and Management, 2020, 462: 117984 [2023-11-10]. doi: 10.1016/j.foreco.2020.117984
[38] 兰道云, 毕华兴, 赵丹阳, 等. 晋西黄土区不同密度油松人工林保育土壤功能评价[J]. 水土保持学报, 2022, 36(2): 189 − 196.

LAN Daoyun, BI Huaxing, ZHAO Danyang, et al. Evaluation on soil conservation function of Pinus tabulaeformis plantation with different densities in the loess area of Western Shanxi Province [J]. Journal of Soil and Water Conservation, 2022, 36(2): 189 − 196.
[39]

LUCAS-BORJA E M, DELGADO-BAQUERIZO M. Plant diversity and soil stoichiometry regulates the changes in multifunctionality during pine temperate forest secondary succession[J/OL]. Science of the Total Environment, 2019, 697: 134204 [2023-11-10]. doi: 10.1016/j.scitotenv.2019.134204.
[40] 李轲, 赵勇钢, 刘小芳, 等. 黄土丘陵区典型草地演替中植物群落特征与土壤储水量关系[J]. 水土保持通报, 2019, 39(1): 55 − 60.

LI Ke, ZHAO Yongqang, LIU Xiaofang, et al. Relationship between plant community characteristics and soil water storage along typical grassland succession in loess hilly region [J]. Bulletin of Soil and Water Conservation, 2019, 39(1): 55 − 60.