气候变化领域集成服务门户(CCPortal): Growth dynamics of fast-growing tree species in mixed forestry and agroforestry plantations

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DOI	10.1016/j.foreco.2020.118672
	Growth dynamics of fast-growing tree species in mixed forestry and agroforestry plantations
	Thomas A.; Priault P.; Piutti S.; Dallé E.; Marron N.
发表日期	2021
ISSN	0378-1127
卷号	480
英文摘要	In recent years, plantations of fast-growing tree species have emerged as a possible way to meet the increasing demand for biomass for renewable energy in Europe. Agroforestry plantations including fast-growing tree species could be an attractive option because they reduce land competition for biomass and food production while providing forest benefits. Today, the species interactions that determine whether a given mixture will be more productive than the corresponding monocultures are still poorly understood. Our objective was to assess the performance of fast-growing trees, i.e. poplar (Populus nigra × P. deltoides) and alder (Alnus glutinosa), in association with herbaceous species either N2-fixing species (succession alfalfa (Medicago sativa) and clover (Trifolium pratense)) or graminoids (succession of wheat (Triticum aestivum) – triticale (Triticosecale) – temporary grassland consisting of mixtures of perennial ryegrass (Lolium perenne) and fescue (Festuca ovina)), respectively, and in association together. We compared tree growth in mixed stands to growth in the respective tree monocultures. An experimental plantation composed of three blocks including the different treatments was set up in 2014 in northeastern France. In the forest mixture, poplar and alder were planted in alternating rows, and in the agroforestry plots, every second line of trees was replaced by the crops. No fertilizers (of any kind) were used during the experiments. During six growing seasons, tree growth (height and diameter at breast height) was monitored monthly in the agroforestry stands, the forest mixture stand and the two tree monocultures. By the end of 2019, poplar stem height in association with N2-fixing crops (alfalfa, then clover) was higher than in the forest mixture and the monoculture. During the warmest growing season with a marked dry period in June-July (2018), poplar height growth rate in the agroforestry treatment was between three and five times higher than for the poplars in the monoculture and the forest mixture. A facilitation process in the agroforestry plantations could explain this result due to a significant enrichment of the soil in nitrogen by the N2-fixing crops. This result only appeared several years after tree planting, and management actions were necessary in order to control the strong competition between crops and trees during the early stages. In the forest mixture, poplars associated with alders were smaller than in their monoculture, in spite of a stratification of the canopies of the two species. For alders, tree growth did not appear to be affected by either an association with graminoids or with poplar. © 2020 Elsevier B.V.
英文关键词	Agroforestry; Fast-growing tree species; Growth dynamics; Interactions; Mixed tree plantations
语种	英语
scopus关键词	Crops; Mixtures; Plants (botany); Reforestation; Diameter-at-breast heights; Different treatments; Herbaceous species; Perennial ryegrass; Renewable energies; Species interactions; Trifolium pratense; Triticale (Triticosecale); Ecology; agroforestry; crop plant; grassland; growth; growth rate; herb; mixed forest; monoculture; plantation forestry; spatiotemporal analysis; tree; Ecology; Farm Crops; Growth Rate; Mixtures; Plantations; Populus; Reforestation; Trees; France; Alnus; Alnus glutinosa; Festuca ovina; Lolium perenne; Medicago sativa; Populus; Populus nigra; Trifolium; Trifolium pratense; Triticosecale; Triticum aestivum
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154834
作者单位	Université de Lorraine, AgroParisTech, INRAE, UMR Silva, Nancy, 54000, France; Université de Lorraine, INRAE, UMR Laboratoire Agronomie et Environnement (LAE), Vandoeuvre, 54518, France
推荐引用方式 GB/T 7714	Thomas A.,Priault P.,Piutti S.,et al. Growth dynamics of fast-growing tree species in mixed forestry and agroforestry plantations[J],2021,480.
APA	Thomas A.,Priault P.,Piutti S.,Dallé E.,&Marron N..(2021).Growth dynamics of fast-growing tree species in mixed forestry and agroforestry plantations.Forest Ecology and Management,480.
MLA	Thomas A.,et al."Growth dynamics of fast-growing tree species in mixed forestry and agroforestry plantations".Forest Ecology and Management 480(2021).