Optimal management for promoting growth of poplar plantations: insights from canopy structure and light environment

Abstract

Tree plantations are globally significant, and therefore, growth-related challenges cannot be ignored. Canopy structure and light environment influence the growth of plantations, but the precise relationship remains unclear. We selected seven-year-old poplar plantations of varying cultivars planted various densities and measured their growth, canopy structure, and light environment. The findings indicate that poplar plantations of different cultivars and at different planting densities showed variations in leaf area index (LAI), average leaf angle (ALA), crown length (CL), length ratio (CLR), roundness (CR) and surface area (CSA), which directly or indirectly affect growth, resulting in disparities in their growing conditions. Crown roundness directly impacted growth, while LAI, CLR and ALA influenced growth indirectly by affecting intercellular carbon dioxide concentration. LAI and CLR had a positive effect; ALA had a negative one. Crown length and surface area directly and indirectly influenced growth by affecting photosynthetically active radiation and net photosynthetic rate, with direct impacts being more pronounced. This research has clarified the regulatory role of canopy structure in plantations growth, providing valuable insights for developing more effective management strategies.

Keywords

Poplar growth / Photosynthesis / Hybrid clones / Structural equation modelling / Crown surface area

References

[1] Ali A, Dai D, Akhtar K, Teng MJ, Yan ZG, Urbina-Cardona N, Mullerova J, Zhou ZX. Response of understory vegetation, tree regeneration, and soil quality to manipulated stand density in a Pinus massoniana plantation. Glob Ecol Conserv, 2019, 20 e00775

[2] Allen ST, Keim RF, Dean TJ. Contrasting effects of flooding on tree growth and stand density determine aboveground production, in baldcypress forests. For Ecol Manage, 2019, 432: 345-355

[3] Annighöfer P. Stress relief through gap creation? Growth response of a shade tolerant species (Fagus sylvatica L.) to a changed light environment. For Ecol Manag, 2018, 415: 139-147

[4] Anthony BM, Minas IS. Optimizing peach tree canopy architecture for efficient light use, increased productivity and improved fruit quality. Agronomy, 2021, 11(10): 1961

[5] Atkins JW, Walter JA, Stovall AEL, Fahey RT, Gough CM. Power law scaling relationships link canopy structural complexity and height across forest types. Funct Ecol, 2022, 36(3713-726

[6] Bao Y, Liu X, Feng CH, Niu MX, Liu C, Wang HL, Yin WL, Xia XL. Light and light signals regulate growth and development in woody plants. Forests, 2024, 15(3): 523

[7] Bello J, Vallet P, Perot T, Balandier P, Seigner V, Perret S, Couteau C, Korboulewsky N. How do mixing tree species and stand density affect seasonal radial growth during drought events?. For Ecol Manage, 2019, 432: 436-445

[8] Bendokas V, Gelvonauskiene D, Siksnianas T, Staniene G, Siksnianiene JB, Gelvonauskis B, Stanys V. Morphological traits of phytomers and shoots in the first year of growth as markers for predicting apple tree canopy architecture. Plant Breed, 2012, 131(1180-185

[9] Binkley D, Laclau JP, Sterba H. Why one tree grows faster than another: patterns of light use and light use efficiency at the scale of individual trees and stands. For Ecol Manage, 2013, 288: 1-4

[10] Borz SA, Toaza JMM, Proto AR. Accuracy of two LiDAR-based augmented reality apps in breast height diameter measurement. Ecol Inform, 2024, 81 102550

[11] Budeanu M, Apostol EN, Popescu F, Postolache D, Ioniţă L. Testing of the narrow crowned Norway spruce ideotype (Picea abies f. pendula) and the hybrids with normal crown form (pyramidalis) in multisite comparative trials. Sci Total Environ, 2019, 689: 980-990

[12] Cao B, Qi JB, Chen EX, Xiao Q, Liu QH, Li ZY. Fine scale optical remote sensing experiment of mixed stand over complex terrain (FOREST) in the Genhe Reserve Area: objective observation and a case study. Int J Digit Earth, 2021, 14(10): 1411-1432

[13] Cao J, Liu HY, Zhao B, Li ZS, Liang BY, Shi L, Wu L, Cressey EL, Quine TA. High forest stand density exacerbates growth decline of conifers driven by warming but not broad-leaved trees in temperate mixed forest in northeast Asia. Sci Total Environ, 2021, 795 148875

[14] Capriotti L, Ricci A, Molesini B, Mezzetti B, Pandolfini T, Piunti I, Sabbadini S. Efficient protocol of de novo shoot organogenesis from somatic embryos for grapevine genetic transformation. Front Plant Sci, 2023, 14: 1172758

[15] Chen ZS. The establishment of binomial stock volume tables of poplar. For Res, 1989, 2(1): 78-83(in Chinese)

[16] Chen FG, Shen J, Min D, Ke LX, Tian X, Korpelainen H, Li CY. Male Populus cathayana than female shows higher photosynthesis and less cellular injury through ABA-induced manganese transporting inhibition under high manganese condition. Trees, 2018, 32(1255-263

[17] Chen MH, Feng S, Gao MY, Liu M, Wang KB, Wang J, Shangguan ZP, Zhang YW. The difference in the photosynthetic characteristics and soil moisture of different varieties of sweet cherry (Prunus avium L). Agric Water Manag, 2024, 302: 109002

[18] Cortini F, Comeau PG. Effects of red alder and paper birch competition on juvenile growth of three conifer species in southwestern British Columbia. For Ecol Manage, 2008, 256(10): 1795-1803

[19] Côté JF, Fournier RA, Frazer GW, Olaf Niemann K. A fine-scale architectural model of trees to enhance LiDAR-derived measurements of forest canopy structure. Agric for Meteor, 2012, 166: 72-85

[20] Dănilă IC, Mititelu C, Palaghianu C. Productivity of short-rotation poplar crops: a case study in the NE of Romania. Forests, 2022, 13(71089

[21] Davies AB, Ancrenaz M, Oram F, Asner GP. Canopy structure drives orangutan habitat selection in disturbed Bornean forests. Proc Natl Acad Sci USA, 2017, 114(318307-8312

[22] De Frenne P, Lenoir J, Luoto M, Scheffers BR, Zellweger F, Aalto J, Ashcroft MB, Christiansen DM, Decocq G, De Pauw K, Govaert S, Greiser C, Gril E, Hampe A, Jucker T, Klinges DH, Koelemeijer IA, Lembrechts JJ, Marrec R, Meeussen C, Ogée J, Tyystjärvi V, Vangansbeke P, Hylander K. Forest microclimates and climate change: importance, drivers and future research agenda. Glob Chang Biol, 2021, 27(11): 2279-2297

[23] de Mattos EM, Binkley D, Campoe OC, Alvares CA, Stape JL. Variation in canopy structure, leaf area, light interception and light use efficiency among Eucalyptus clones. For Ecol Manag, 2020, 463 118038

[24] Dickmann D (Ed) 2001 Poplar culture in north America. NRC Research Press.

[25] Ding CJ, Zhang WX, Wang YB, Ding M, Wang XJ, Li AP, Liang DJ, Su XH. Study on the differences of phyllosphere microorganisms between poplar hybrid offspring and their parents. PeerJ, 2022, 10 e12915

[26] Dou YX, Liao JJ, An SS. Importance of soil labile organic carbon fractions in shaping microbial community after vegetation restoration. CATENA, 2023, 220 106707

[27] Duursma RA, Kolari P, Perämäki M, Pulkkinen M, Mäkelä A, Nikinmaa E, Hari P, Aurela M, Berbigier P, Bernhofer CH, Grünwald T, Loustau D, Mölder M, Verbeeck H, Vesala T. Contributions of climate, leaf area index and leaf physiology to variation in gross primary production of six coniferous forests across Europe: a model-based analysis. Tree Physiol, 2009, 29(5): 621-639

[28] Eldegard K, Scholten J, Stokland JN, Granhus A, Lie M. The influence of stand density on bilberry (Vaccinium myrtillus L.) cover depends on stand age, solar irradiation, and tree species composition. For Ecol Manag, 2019, 432: 582-590

[29] Fang SZ, Liu Y, Yue J, Tian Y, Xu XZ. Assessments of growth performance, crown structure, stem form and wood property of introduced poplar clones: results from a long-term field experiment at a lowland site. For Ecol Manage, 2021, 479 118586

[30] Feng LY, Raza MA, Li ZC, Chen YK, Khalid MHB, Du JB, Liu WG, Wu XL, Song C, Yu L, Zhang ZW, Yuan S, Yang WY, Yang F. The influence of light intensity and leaf movement on photosynthesis characteristics and carbon balance of soybean. Front Plant Sci, 2019, 9: 1952

[31] Forrester DI. Linking forest growth with stand structure: Tree size inequality, tree growth or resource partitioning and the asymmetry of competition. For Ecol Manag, 2019, 447: 139-157

[32] Fotis AT, Morin TH, Fahey RT, Hardiman BS, Bohrer G, Curtis PS. Forest structure in space and time: biotic and abiotic determinants of canopy complexity and their effects on net primary productivity. Agric for Meteor, 2018, 250: 181-191

[33] Fransson P, Brännström Å, Franklin O. A tree’s quest for light-optimal height and diameter growth under a shading canopy. Tree Physiol, 2021, 41(1): 1-11

[34] Georgi L, Kunz M, Fichtner A, Bienert A, Maas HG, von Oheimb G. Effects of tree diversity on canopy space occupation vary with tree size and canopy space definition in a mature broad-leaved forest. Agric for Meteor, 2022, 323 109055

[35] Grams TEE, Lüttge U (2010) Space as a resource. In: Progress in botany 72. Springer Berlin Heidelberg, pp 349–370. https://doi.org/10.1007/978-3-642-13145-5_13

[36] Guo WY, Li PY, Du QQ, Zhou YH, Xu DX, Zhang ZY. Hydrogeochemical processes regulating the groundwater geochemistry and human health risk of groundwater in the rural areas of the Wei River Basin. China Expo Health, 2024, 16(2): 291-306

[37] He DN, Peng DL, Yang H, Zhang XH. The response of seedlings and saplings to canopy structure and light in different gaps in a spruce-fir mixed stand in Changbai Mountains. China for Ecol Manag, 2023, 546 121365

[38] Hellwig T, Abbo S, Ophir R. Phylogeny and disparate selection signatures suggest two genetically independent domestication events in pea (Pisum L.). Plant J, 2022, 110(2): 419-439

[39] Holeski LM, Hillstrom ML, Whitham TG, Lindroth RL. Relative importance of genetic, ontogenetic, induction, and seasonal variation in producing a multivariate defense phenotype in a foundation tree species. Oecologia, 2012, 170(3): 695-707

[40] Hosseini A, Hosseini SM, Linares JC. Linking morphological and ecophysiological leaf traits to canopy dieback in Persian oak trees from central Zagros. J for Res, 2019, 30(5): 1755-1764

[41] Hu B, Tang LQ, Liu H, Zhao XJ, Liu ZR, Wang YS, Wang LC. Trends of photosynthetically active radiation over China from 1961 to 2014. Int J Climatol, 2018, 38(10): 4007-4024

[42] Hui G, Zhang L, Wang H, Zhang G. Stand crowding degree and its application. J Beijing for Univ, 2016, 38: 1-6

[43] Ianovici N, Batalu A, Hriscu D, Daniela Datcu A. Phytomonitoring study on intra urban variations of leaves of some evergreen and deciduous trees. Ecol Indic, 2020, 114 106313

[44] Jiang QH, Liu ZC, Liu WW, Li T, Cong WL, Zhang HC, Shi JL. A principal component analysis based three-dimensional sustainability assessment model to evaluate corporate sustainable performance. J Clean Prod, 2018, 187: 625-637

[45] Jucker T, Bouriaud O, Coomes DA. Crown plasticity enables trees to optimize canopy packing in mixed-species forests. Funct Ecol, 2015, 29(8): 1078-1086

[46] Kholdaenko YA, Belokopytova LV, Zhirnova DF, Upadhyay KK, Tripathi SK, Koshurnikova NN, Sobachkin RS, Babushkina EA, Vaganov EA. Stand density effects on tree growth and climatic response in Picea obovata Ledeb. plantations. For Ecol Manage, 2022, 519 120349

[47] King DA, Davies SJ, Nur Supardi MN, Tan S. Tree growth is related to light interception and wood density in two mixed dipterocarp forests of Malaysia. Funct Ecol, 2005, 19(3): 445-453

[48] Kong FL, Bi HQ, McLean M, Li FR. Comparative performances of new and existing indices of crown asymmetry: an evaluation using tall trees of Eucalyptus pilularis (Smith). J for Res, 2021, 32(1): 43-65

[49] Kovács B, Tinya F, Óder P. Stand structural drivers of microclimate in mature temperate mixed forests. Agric for Meteor, 2017, 234: 11-21

[50] Krůček M, Trochta J, Cibulka M, Král K. Beyond the cones: how crown shape plasticity alters aboveground competition for space and light—evidence from terrestrial laser scanning. Agric for Meteorol, 2019, 264: 188-199

[51] Lei J, Du HL, Duan AG, Zhang JG. Effect of stand density and soil layer on soil nutrients of a 37-year-old Cunninghamia lanceolata plantation in Naxi, Sichuan province. China Sustainability, 2019, 11(19): 5410

[52] Liao LH, Cao L, Xie YJ, Luo JZ, Wang GB. Phenotypic traits extraction and genetic characteristics assessment of Eucalyptus trials based on UAV-borne LiDAR and RGB images. Remote Sens, 2022, 14(3765

[53] Liu CLC, Kuchma O, Krutovsky KV. Mixed-species versus monocultures in plantation forestry: Development, benefits, ecosystem services and perspectives for the future. Glob Ecol Conserv, 2018, 15 e00419

[54] Liu XQ, Feng YH, Hu TY, Luo Y, Zhao XX, Wu J, Maeda EE, Ju WM, Liu LL, Guo QH, Su YJ. Enhancing ecosystem productivity and stability with increasing canopy structural complexity in global forests. Sci Adv, 2024, 10(20eadl1947

[55] Lodolini EM, de Iudicibus A, Lucchese PG, Las Casas G, Torrisi B, Nicolosi E, Giuffrida A, Ferlito F. Comparison of canopy architecture of five olive cultivars in a high-density planting system in Sicily. Agriculture (Basel), 2023, 13(81612

[56] Matsuo T, Martínez-Ramos M, Bongers F, van der Sande MT, Poorter L. Forest structure drives changes in light heterogeneity during tropical secondary forest succession. J Ecol, 2021, 109(82871-2884

[57] Niinemets Ü, Tobias M. Canopy leaf area index at its higher end: dissection of structural controls from leaf to canopy scales in bryophytes. New Phytol, 2019, 223(1): 118-133

[58] Parker GG. Tamm review: leaf area index (LAI) is both a determinant and a consequence of important processes in vegetation canopies. For Ecol Manage, 2020, 477 118496

[59] Primicia I, Camarero JJ, Imbert JB, Castillo FJ. Effects of thinning and canopy type on growth dynamics of Pinus sylvestris: inter-annual variations and intra-annual interactions with microclimate. Eur J for Res, 2013, 132(1): 121-135

[60] Primicia I, Camarero JJ, Janda P, Vojtĕch Č, Morrissey RC, Trotsiuk V, Bače R, Teodosiu M, Svoboda M. Age, competition, disturbance and elevation effects on tree and stand growth response of primary Picea abies forest to climate. For Ecol Manag, 2015, 354: 77-86

[61] Proutsos N, Liakatas A, Alexandris S. Ratio of photosynthetically active to total incoming radiation above a Mediterranean deciduous oak forest. Theor Appl Climatol, 2019, 137(3): 2927-2939

[62] Rawat M, Arunachalam K, Arunachalam A, Alatalo JM, Pandey R. Predicting litter decomposition rate for temperate forest tree species by the relative contribution of green leaf and litter traits in the Indian Himalayas region. Ecol Indic, 2020, 119 106827

[63] Rédei T, Csecserits A, Lhotsky B, Barabás S, Kröel-Dulay G, Gábor Ó, Botta-Dukát Z. Plantation forests cannot support the richness of forest specialist plants in the forest-steppe zone. For Ecol Manag, 2020, 461 117964

[64] Seidel D, Ruzicka KJ, Puettmann K. Canopy gaps affect the shape of Douglas-fir crowns in the western Cascades, Oregon. For Ecol Manag, 2016, 363: 31-38

[65] Shah AN, Yang GZ, Tanveer M, Iqbal J. Leaf gas exchange, source–sink relationship, and growth response of cotton to the interactive effects of nitrogen rate and planting density. Acta Physiol Plant, 2017, 39(5): 119

[66] Shi TT, Zhang XX, Hou YK, Jia CF, Dan XM, Zhang YL, Jiang YZ, Lai Q, Feng JJ, Feng JJ, Ma T, Wu JL, Liu SY, Zhang L, Long ZQ, Chen LY, Street NR, Ingvarsson PK, Liu JQ, Yin TM, Wang J. The super-pangenome of Populus unveils genomic facets for its adaptation and diversification in widespread forest trees. Mol Plant, 2024, 17(5725-746

[67] Silveira EMO, Radeloff VC, Martinuzzi S, Martinez Pastur GJ, Bono J, Politi N, Lizarraga L, Rivera LO, Ciuffoli L, Rosas YM, Olah AM, Gavier-Pizarro GI, Pidgeon AM. Nationwide native forest structure maps for Argentina based on forest inventory data, SAR Sentinel-1 and vegetation metrics from Sentinel-2 imagery. Remote Sens Environ, 2023, 285 113391

[68] Sullivan TP, Sullivan DS. Acceleration of old-growth structural attributes in lodgepole pine forest: tree growth and stand structure 25 years after thinning. For Ecol Manage, 2016, 365: 96-106

[69] Uria-Diez J, Pommerening A. Crown plasticity in Scots pine (Pinus sylvestris L.) as a strategy of adaptation to competition and environmental factors. Ecol Model, 2017, 356: 117-126

[70] Wan P, He RR. Canopy structure and understory light characteristics of a natural Quercus aliena var. acuteserrata forest in China northwest: Influence of different forest management methods. Ecol Eng, 2020, 153: 105901

[71] Wang WJ, He HS, Fraser JS, Dijak WD, Spetich MA. Population dynamics has greater effects than climate change on tree species distribution in a temperate forest region. J Biogeogr, 2018, 45(12): 2766-2778

[72] Wang HB, Qin J, Hu YH, Guo CB. Asymmetric growth of belowground and aboveground tree organs and their architectural relationships: a review. Can J for Res, 2023, 53(5315-327

[73] Xi BY, Clothier B, Coleman M, Duan J, Hu W, Li DD, Di N, Liu Y, Fu JY, Li JS, Jia LM, Fernández JE. Irrigation management in poplar (Populus spp) plantations: a review. For Ecol Manag, 2021, 494: 119330

[74] Xing Y, Brimblecombe P, Wang SF, Zhang H. Tree distribution, morphology and modelled air pollution in urban parks of Hong Kong. J Environ Manage, 2019, 248 109304

[75] Xu ZF, Chen LH, Tang SS, Zhuang LY, Yang WQ, Tu LH, Tan B, Zhang L. Sex-specific responses to Pb stress in Populus deltoides: root architecture and Pb translocation. Trees, 2016, 30(6): 2019-2027

[76] Yang YN, Jiang H, Wang ML, Korpelainen H, Li CY. Male poplars have a stronger ability to balance growth and carbohydrate accumulation than do females in response to a short-term potassium deficiency. Physiol Plant, 2015, 155(4400-413

[77] Yang YQ, Li PY, Elumalai V, Ning J, Xu F, Mu DW. Groundwater quality assessment using EWQI with updated water quality classification criteria: a case study in and around Zhouzhi County, Guanzhong basin (China). Expo Health, 2023, 15(4): 825-840

[78] Yao JX, Li HG, Ye J, Shi LL. Relationship between parental genetic distance and offspring’s heterosis for early growth traits in Liriodendron: implication for parent pair selection in cross breeding. New for, 2016, 47(1): 163-177

[79] Zhang S, Jiang H, Zhao HX, Korpelainen H, Li CY. Sexually different physiological responses of Populus cathayana to nitrogen and phosphorus deficiencies. Tree Physiol, 2014, 34(4): 343-354

[80] Zhang ZQ, Zhang L, Xu H, Creed IF, Blanco JA, Wei XH, Sun G, Asbjornsen H, Bishop K. Forest water-use efficiency: effects of climate change and management on the coupling of carbon and water processes. For Ecol Manag, 2023, 534 120853

[81] Zhao XL, Xie PL, Zhang XQ, Ou ZY, Ma HX, Suo C, Ma JQ, Wan P. Characteristics of different aged plantations of Ormosia hosiei with regards to soil microbial biomass and enzymatic activities. J for Res, 2024, 35(1119

[82] Zhao XL, Zhang XQ, Li ZF, Wang BX, Zhang TQ, Wan P. Development of root rot in Zanthoxylum bungeanum is closely linked to changes in soil microbial communities, enzyme activities, and physicochemical factors. Glob Ecol Conserv, 2024, 55 e03249

[83] Zhou LH, Wang YX, Chen CC, Tong SY, Kang F. Influence of leaf area index inversion and the light transmittance mechanism in the apple tree canopy. Forests, 2024, 15(5823

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