Scandinavian Journal of Forest Research最新文献_第10页

Tree-level differences in Norway spruce and Scots pine growth after extreme thinning treatments 极端间伐处理后挪威云杉和苏格兰松生长的树级差异

IF 1.8 3区农林科学

Scandinavian Journal of Forest Research Pub Date : 2022-02-17 DOI: 10.1080/02827581.2022.2045348

S. Bianchi, S. Huuskonen, J. Hynynen, J. Siipilehto, P. Niemistö

{"title":"Tree-level differences in Norway spruce and Scots pine growth after extreme thinning treatments","authors":"S. Bianchi, S. Huuskonen, J. Hynynen, J. Siipilehto, P. Niemistö","doi":"10.1080/02827581.2022.2045348","DOIUrl":"https://doi.org/10.1080/02827581.2022.2045348","url":null,"abstract":"ABSTRACT We studied tree-level dynamics (stem slenderness and growth) in spruce- and pine-dominated stands after intermediate commercial thinning of different type (low, crown normal, and crown strict) and intensity (standard and extreme), for two 5-years growth periods. Thinning treatments were included in modeling as numerical variables based on how they changed the stand- and tree-level conditions (in terms of mean diameter of remaining trees and basal area of larger trees removed). Stem slenderness significantly decreased with time for both species and all types only in the extreme intensity (excluding low thinning for pine). Regarding basal area growth, for both species it was slightly higher in low than crown thinning, and much higher in extreme intensity for all thinning types. Pine had a lower basal area growth in the second period after thinning compared with the first one. Height growth differences were not found across treatments. Concluding, extreme thinning increased individual tree basal area growth and decreased stem slenderness for both species compared with thinning carried out according to the standard guidelines. Across types, there were only small differences, hence crown thinning seems a viable option to the widely used low thinning in Fennoscandia.","PeriodicalId":21352,"journal":{"name":"Scandinavian Journal of Forest Research","volume":"37 1","pages":"109 - 118"},"PeriodicalIF":1.8,"publicationDate":"2022-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46991033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Strip cutting management in Scots pine stands on peatlands – a financial comparison to rotation forestry 泥炭地苏格兰松林的带状砍伐管理——与轮伐林业的财务比较

IF 1.8 3区农林科学

Scandinavian Journal of Forest Research Pub Date : 2022-02-17 DOI: 10.1080/02827581.2022.2055135

A. Ahtikoski, H. Hökkä, J. Siipilehto

{"title":"Strip cutting management in Scots pine stands on peatlands – a financial comparison to rotation forestry","authors":"A. Ahtikoski, H. Hökkä, J. Siipilehto","doi":"10.1080/02827581.2022.2055135","DOIUrl":"https://doi.org/10.1080/02827581.2022.2055135","url":null,"abstract":"ABSTRACT Even-aged management (rotation forestry, RF) involves ditch network maintenance (DNM) operations in peatlands. Although the DNM operations contribute tree growth, they have negative environmental effects on watercources. To avoid DNM, a strip cutting (SC) management has been proposed. SC management in peatlands relies on natural regeneration by trees growing on the edge stand next to a clear-cut strip. The width of a cut strip varies, and here 20, 35 and 50 m strip width were applied in three locations in Finland: Akaa (southern), Kuopio (central), and Oulu (northern Finland). Tree growth of an edge stand and sapling stand was modeled with a stand-level model which accounted for the effect of dominant height of the edge stand and variation of shading among alternative strip widths. In southern location, RF financially outperformed SC management with interest rates 2–4%, but with a 5% interest rate and strip with of 35 or 50 m SC management was more beneficial than RF. In central and northern locations RF was better only with a 2% interest rate and with a 20 m strip width. Our results demonstrate that SC management is a financially valid option to apply in pine-dominated peatlands, particularly in northern regions.","PeriodicalId":21352,"journal":{"name":"Scandinavian Journal of Forest Research","volume":"37 1","pages":"119 - 129"},"PeriodicalIF":1.8,"publicationDate":"2022-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42110990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Stand-level growth models for long-term projections of the main species groups in Norway 挪威主要物种群长期预测的林分水平增长模型

IF 1.8 3区农林科学

Scandinavian Journal of Forest Research Pub Date : 2022-02-17 DOI: 10.1080/02827581.2022.2056632

Kobra Maleki, R. Astrup, C. Kuehne, J. Mclean, C. Antón-Fernández

{"title":"Stand-level growth models for long-term projections of the main species groups in Norway","authors":"Kobra Maleki, R. Astrup, C. Kuehne, J. Mclean, C. Antón-Fernández","doi":"10.1080/02827581.2022.2056632","DOIUrl":"https://doi.org/10.1080/02827581.2022.2056632","url":null,"abstract":"ABSTRACT Stand-level growth and yield models are important tools that support forest managers and policymakers. We used recent data from the Norwegian National Forest Inventory to develop stand-level models, with components for dominant height, survival (number of survived trees), ingrowth (number of recruited trees), basal area, and total volume, that can predict long-term stand dynamics (i.e. 150 years) for the main species in Norway, namely Norway spruce (Picea abies (L.) Karst.), Scots pine (Pinus sylvestris L.), and birch (Betula pubescens Ehrh. and Betula pendula Roth). The data used represent the structurally heterogeneous forests found throughout Norway with a wide range of ages, tree size mixtures, and management intensities. This represents an important alternative to the use of dedicated and closely monitored long-term experiments established in single species even-aged forests for the purpose of building these stand-level models. Model examination by means of various fit statistics indicated that the models were unbiased, performed well within the data range and extrapolated to biologically plausible patterns. The proposed models have great potential to form the foundation for more sophisticated models, in which the influence of other factors such as natural disturbances, stand structure including species mixtures, and management practices can be included.","PeriodicalId":21352,"journal":{"name":"Scandinavian Journal of Forest Research","volume":"37 1","pages":"130 - 143"},"PeriodicalIF":1.8,"publicationDate":"2022-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49332438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Life cycle analysis to estimate CO2 e emissions from forest harvesting systems in intensively managed Pinus radiata plantations 生命周期分析用于估算集约管理辐射松人工林森林采伐系统的二氧化碳排放量

IF 1.8 3区农林科学

Scandinavian Journal of Forest Research Pub Date : 2022-02-17 DOI: 10.1080/02827581.2022.2044901

R. Alzamora, Waldo Oviedo, R. Rubilar

{"title":"Life cycle analysis to estimate CO2 e emissions from forest harvesting systems in intensively managed Pinus radiata plantations","authors":"R. Alzamora, Waldo Oviedo, R. Rubilar","doi":"10.1080/02827581.2022.2044901","DOIUrl":"https://doi.org/10.1080/02827581.2022.2044901","url":null,"abstract":"ABSTRACT A Life Cycle Analyses (LCA) assessment was evaluated comparing three harvesting systems on intensively managed Pinus radiata (radiata pine) plantations growing in the Biobío Region, Chile. Evaluated systems considered semi-mechanized, mechanized, and tower logging in steep slope forest operations. Our LCA study focused on CO2 e emissions from six harvesting activities: felling, logging, processing, sorting, loading, and transportation, all under the ISO 14040 and ISO 14044 standards. The average and maximum monthly production scenarios were the highest for the semi-mechanized system with 24 and 25.2 kg CO2 e m−3, followed by the tower logging with 23.2 and 24.5 kg CO2 e m−3 and, lastly, the mechanized system with 11 and 12.1 kg CO2 e m−3. Similar to other studies, harvesting phases that contributed the most were logging, loading and transport. Concerning LCA stages, forest equipment operation generated the highest CO2 e level across the three harvesting systems where fuel consumption was the activity that contributed with 76% of CO2 e for the mechanized system, and 50% in the case of the tower logging and semi-mechanized systems. The mechanized system had the highest fuel use efficiency and the lowest CO2 e emissions.","PeriodicalId":21352,"journal":{"name":"Scandinavian Journal of Forest Research","volume":"37 1","pages":"144 - 152"},"PeriodicalIF":1.8,"publicationDate":"2022-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49493007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Successful spruce regenerations – impact of site preparation and the use of variables from digital elevation models in decision-making? 成功的云杉再生——场地准备的影响和决策中数字高程模型变量的使用?

IF 1.8 3区农林科学

Scandinavian Journal of Forest Research Pub Date : 2022-01-02 DOI: 10.1080/02827581.2022.2028895

P. Nordin, E. Olofsson, K. Hjelm

{"title":"Successful spruce regenerations – impact of site preparation and the use of variables from digital elevation models in decision-making?","authors":"P. Nordin, E. Olofsson, K. Hjelm","doi":"10.1080/02827581.2022.2028895","DOIUrl":"https://doi.org/10.1080/02827581.2022.2028895","url":null,"abstract":"ABSTRACT Various site preparation methods are used in Swedish forestry. However, some methods can lead to unnecessary disturbance, which could be avoided by using variables from digital elevation models in management decisions. The current study aimed to investigate how different site preparation methods, and their intensities, affect Norway spruce (Picea abies (L.) Karst.) regeneration. Additional aims were to clarify how these methods affect soil disturbance and vegetation development, along with how variables from digital elevation models could be used in silvicultural decision-making. Experimental sites were established in southern Sweden to assess five different site preparation treatments with different planting densities: (1) conventional disc trenching 2500 seedlings/ha (DT2500); (2) low intensity disc trenching 1250 seedlings/ha (LDT1250); (3) low intensity disc trenching 2500 seedlings/ha (LDT2500); (4) low-intensity patch-wise 1250 seedlings/ha (PW1250); and (5) patch-wise 2500 seedlings/ha (PW2500). Site preparation intensity had no effect on seedling growth and, survival or vegetation development; the tested treatments differed in terms of soil disturbance. Planting spot properties and weather conditions influenced the seedling performance. DTW and slope could not substantially explain either seedling growth or survival. The results indicate that the choice of site preparation method should consider flexibility when planting while adapting the level of disturbance accordingly.","PeriodicalId":21352,"journal":{"name":"Scandinavian Journal of Forest Research","volume":"37 1","pages":"33 - 44"},"PeriodicalIF":1.8,"publicationDate":"2022-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46735938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of individual-tree growth models for Picea abies based on a case study of an uneven-sized stand in southern Sweden 基于瑞典南部一个不均匀林分的案例研究对云杉个体树木生长模型的评估

IF 1.8 3区农林科学

Scandinavian Journal of Forest Research Pub Date : 2022-01-02 DOI: 10.1080/02827581.2022.2037700

N. Fagerberg, P. Lohmander, O. Eriksson, Jan-ola Olsson, B. Poudel, J. Bergh

{"title":"Evaluation of individual-tree growth models for Picea abies based on a case study of an uneven-sized stand in southern Sweden","authors":"N. Fagerberg, P. Lohmander, O. Eriksson, Jan-ola Olsson, B. Poudel, J. Bergh","doi":"10.1080/02827581.2022.2037700","DOIUrl":"https://doi.org/10.1080/02827581.2022.2037700","url":null,"abstract":"ABSTRACT To develop recommendations for tree selection in Continuous Cover Forestry (CCF), access to valid tools for simulating growth at individual tree-level is necessary. To assist efforts to develop such tools, in this study, long-term observation data from two uneven-sized Norway spruce plots in southern Sweden are used to evaluate old and new individual-tree growth models (two established Swedish models, two new preliminary models and included as a reference, a Finnish model). The plots’ historical management records and site conditions are the same, but their last thinning treatment differs. Observed diameter increment at tree-level is investigated in relation to treatment. Individual tree growth residuals of tested models are evaluated in relation to tree diameter, treatment, projection length and sensitivity to the predictor mean stand age. Furthermore, the relations between displayed residuals and basal area local competition are analysed. The analyses indicate that active thinning made annual diameter increment independent of tree diameter above a threshold level, while the absence of thinning supported a concave relationship. All tested models displayed a significant linear bias leading to overestimation of small trees’ growth and increasing underestimations of larger trees’ growth with tree diameter. All distance-independent models displayed residual trends related to local competition.","PeriodicalId":21352,"journal":{"name":"Scandinavian Journal of Forest Research","volume":"37 1","pages":"45 - 58"},"PeriodicalIF":1.8,"publicationDate":"2022-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48377531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Epigenetic memory effects in Norway spruce: are they present after the age of two years? 挪威云杉的表观遗传记忆效应：它们在两岁后出现吗？

IF 1.8 3区农林科学

Scandinavian Journal of Forest Research Pub Date : 2022-01-02 DOI: 10.1080/02827581.2022.2045349

T. Skrøppa

{"title":"Epigenetic memory effects in Norway spruce: are they present after the age of two years?","authors":"T. Skrøppa","doi":"10.1080/02827581.2022.2045349","DOIUrl":"https://doi.org/10.1080/02827581.2022.2045349","url":null,"abstract":"ABSTRACT Short-term trials on cultivated soil were planted with families of Norway spruce that had shown epigenetic memory effects in early tests up to age two years. Measurements and assessments were made of phenology traits, tree heights and stem defects until age 16 years in these trials. The memory effects of the temperature conditions during embryo development and seed maturation were confirmed for the timing of bud flush and for start and cessation of shoot elongation at age six years. The mean differences in timing of these events caused by temperature treatments were on average less than two days. They were considerably larger for families with strong effects on terminal bud set at the end of the first growing season. The memory effects did not result in a prolonged shoot growth period, nor did they affect height growth. Interaction effects expressed in adaptive traits between factorial treatments of temperature and daylength during seed production were large in the short-term trial and were still present at age nine years. The results presented demonstrate that strong memory effects observed in early tests may also be expressed in phenology traits for at least the next five growing seasons.","PeriodicalId":21352,"journal":{"name":"Scandinavian Journal of Forest Research","volume":"37 1","pages":"6 - 13"},"PeriodicalIF":1.8,"publicationDate":"2022-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45524455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Using hybrid modelling to predict basal area and evaluate effects of climate change on growth of Norway spruce and Scots pine stands 使用混合模型预测基底面积并评估气候变化对挪威云杉和苏格兰松生长的影响

IF 1.8 3区农林科学

Scandinavian Journal of Forest Research Pub Date : 2022-01-02 DOI: 10.1080/02827581.2022.2039278

Martin Goude, U. Nilsson, E. Mason, G. Vico

{"title":"Using hybrid modelling to predict basal area and evaluate effects of climate change on growth of Norway spruce and Scots pine stands","authors":"Martin Goude, U. Nilsson, E. Mason, G. Vico","doi":"10.1080/02827581.2022.2039278","DOIUrl":"https://doi.org/10.1080/02827581.2022.2039278","url":null,"abstract":"ABSTRACT\u0000 When modelling forest growth, capturing the effects of climate change is needed for reliable long-term predictions and management choices. This remains a challenge because commonly used mensurational forest growth and yield models, relying on inventory data, cannot account for climate change effects. We developed hybrid physiological/mensurational basal area growth and yield models, which combine physiological response to climatic conditions and empirical relations. We included climate and site effects by replacing time with light sums of photosynthetically active radiation and modifying the latter with monthly soil water, vapour pressure deficit, temperature, and frost days. When parameterised with permanent sample plot data for Scots pine and Norway spruce across Sweden, the hybrid models could reproduce observations well, although with no increase in precision compared with time-based mensurational models. When considering different climate scenarios, a significant impact on productivity from climate change emerged. For example, a 2 °C warming enhanced Scots pine production by up to 14% in regions where temperatures were originally cooler and soil water deficit was low (i.e. northwest Sweden), but depressed it, up to 9%, elsewhere. Hence, climate-sensitive models that take local variations into account are necessary for accurate predictions and sustainable forest management.","PeriodicalId":21352,"journal":{"name":"Scandinavian Journal of Forest Research","volume":"37 1","pages":"59 - 73"},"PeriodicalIF":1.8,"publicationDate":"2022-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49300498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Phenotypic plasticity in Populus trichocarpa clones across environments in the Nordic–Baltic region 北欧-波罗的海地区毛果杨无性系在不同环境中的表型可塑性

IF 1.8 3区农林科学

Scandinavian Journal of Forest Research Pub Date : 2022-01-02 DOI: 10.1080/02827581.2022.2039279

A. Rönnberg-Wästljung, Anneli Adler, Almir Karacic, K. Liepiņš, Thomas J. Richards, P. Ingvarsson, M. Weih

{"title":"Phenotypic plasticity in Populus trichocarpa clones across environments in the Nordic–Baltic region","authors":"A. Rönnberg-Wästljung, Anneli Adler, Almir Karacic, K. Liepiņš, Thomas J. Richards, P. Ingvarsson, M. Weih","doi":"10.1080/02827581.2022.2039279","DOIUrl":"https://doi.org/10.1080/02827581.2022.2039279","url":null,"abstract":"ABSTRACT\u0000 Transition towards a bio-based society requires large amounts of woody biomass to be converted into biofuels and biomaterials. Populus species are good candidates for growth in short rotations, but there is a lack of climate-adapted plant material suitable for growth at the high latitudes of the Nordic–Baltic region. Here we studied the growth and phenology traits in 63 Populus trichocarpa clones earlier preliminary selected for growth at northern latitudes, in three different field sites; i.e. in central Sweden, eastern and western Latvia. The material showed moderate broad sense heritabilities, with high values for phenology traits, indicating opportunities for selection. Genotype × environment (g × e) interaction was identified for all traits, but the phenotypic correlation between pairs of sites provided more detailed information indicating the strength of the g × e interaction. The between-clone variation in plasticity was high, and we identified some clones showing a high and stable performance across the three sites. These clones are of particular interest for the commercial deployment and future breeding of Populus material for the Nordic–Baltic region.","PeriodicalId":21352,"journal":{"name":"Scandinavian Journal of Forest Research","volume":"37 1","pages":"1 - 5"},"PeriodicalIF":1.8,"publicationDate":"2022-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43963249","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Drought could promote the heartwood formation in Dalbergia odorifera by enhancing the transformation of starch to soluble sugars 干旱可通过促进淀粉向可溶性糖的转化促进降香药材心材的形成

IF 1.8 3区农林科学

Scandinavian Journal of Forest Research Pub Date : 2021-12-03 DOI: 10.1080/02827581.2021.2009022

Zhiyi Cui, Zengjiang Yang, Daping Xu, Xiaofei Li

{"title":"Drought could promote the heartwood formation in Dalbergia odorifera by enhancing the transformation of starch to soluble sugars","authors":"Zhiyi Cui, Zengjiang Yang, Daping Xu, Xiaofei Li","doi":"10.1080/02827581.2021.2009022","DOIUrl":"https://doi.org/10.1080/02827581.2021.2009022","url":null,"abstract":"ABSTRACT The heartwood of Dalbergia odorifera T. Chen (D. odorifera) is highly valuable. It was speculated that drought could promote heartwood formation in D. odorifera. To test this hypothesis, we artificially simulated conditions of low and high soil moisture content and investigated whether D. odorifera trees living in habitats with contrasting soil water conditions display distinct heartwood formation. Besides, we performed a preliminary study to explore the possible mechanism of drought affecting heartwood formation in D. odorifera in terms of non-structural carbohydrates (NSC). Higher heartwood formation percentage and heartwood size were observed in drought-treated trees. The heartwood density of drought-treated trees was significantly greater than that of control and the oil content of heavy drought-treated heartwood was significantly higher than that of the other treatments. None of water treatments had a significant effect on the essential oil components of heartwood. Furthermore, the effects of water treatments on the total amount of NSC were very limited; however drought treatments enhanced the transformation of starch to soluble sugars compared to control. This study confirmed the hypothesis that drought could promote the heartwood formation in D. odorifera, not by changing the total amount of NSC but by changing the component proportion of NSC.","PeriodicalId":21352,"journal":{"name":"Scandinavian Journal of Forest Research","volume":"37 1","pages":"23 - 32"},"PeriodicalIF":1.8,"publicationDate":"2021-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47435185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3