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DOI | 10.1016/j.foreco.2018.03.039 |
Carry-over benefit of high internal N pool on growth and function of oak seedlings (Quercus petraea) competing with Deschampsia cespitosa | |
Vernay, Antoine1; Malagoli, Philippe1; Fernandez, Marine1; Perot, Thomas2; Ameglio, Thierry1; Balandier, Philippe2 | |
2018-07-01 | |
发表期刊 | FOREST ECOLOGY AND MANAGEMENT
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ISSN | 0378-1127 |
EISSN | 1872-7042 |
出版年 | 2018 |
卷号 | 419页码:130-138 |
文章类型 | Article |
语种 | 英语 |
国家 | France |
英文摘要 | In contrast to N soil availability or carbon (C) reserves, the role of N reserves in plant interactions has been under-researched. The N-loading of tree seedlings in nurseries before plantation within a forest community to increase their survival and early growth is still controversial. We hypothesized that a larger N-loaded pool in oak seedlings during year n - 1 might favor growth and function during yearn through higher N remobilization, and thus lessen the impact of competition from Deschampsia cespitosa (tussock grass). In 2015, we cultivated two sets of one-year oak seedlings in 20 L pots with two nitrogen supply levels: no supply (N-unloaded) and 87 kg ha(-1) (N-loaded), without competition and without water limitation. A greenhouse experiment was then undertaken in 2016 with the same two oak batches, but with 0, 1, 2 or 3 tillers of D. cespitosa in both N-loaded and N-unloaded batches. Half the pots were subjected to drought for one month (August 2016). Soil water availability was the prime factor driving plant growth and photosynthetic responses in oak, both with and without competition. Under well-watered conditions, a greater internal N pool was correlated with higher oak photosynthesis. A high internal N pool was also beneficial to oak seedlings under low competitive pressure from D. cespitosa. However, when grass density increased, intraspecific competition outweighed interspecific competition, and attenuated the negative effect of D. cespitosa on oak seedlings. A carry-over effect of N-loading thus had a positive effect on growth and function in oak seedlings when no water stress occurred under low competition by D. cespitosa: this effect may derive from more N storage in perennial tissues, resulting in more N mobilized during vegetative growth. Our results underline the importance of the internal N pool in plant competition, and are evidence that a higher potential regenerative success rate of oak seedlings is related to abiotic conditions, competitive pressure and internal N pool. |
英文关键词 | Carry-over effect Competition Deschampsia cespitosa Forest regeneration Inter/intraspecific interactions Internal N pool Photosynthesis Quercus petraea seedling Water stress |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000432498900013 |
WOS关键词 | NITROGEN NUTRITION ; FIELD PERFORMANCE ; STORAGE PROTEINS ; MOLINIA-CAERULEA ; TREE SEEDLINGS ; PEACH-TREES ; WATER ; DROUGHT ; FOREST ; VEGETATION |
WOS类目 | Forestry |
WOS研究方向 | Forestry |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/23412 |
专题 | 气候变化 |
作者单位 | 1.Univ Clermont Auvergne, INRA, PIAF, F-63000 Clermont Ferrand, France; 2.Irstea, Res Unit Forest Ecosyst EFNO, F-45290 Domaine Des Barres, Nogent Sur Vern, France |
推荐引用方式 GB/T 7714 | Vernay, Antoine,Malagoli, Philippe,Fernandez, Marine,et al. Carry-over benefit of high internal N pool on growth and function of oak seedlings (Quercus petraea) competing with Deschampsia cespitosa[J]. FOREST ECOLOGY AND MANAGEMENT,2018,419:130-138. |
APA | Vernay, Antoine,Malagoli, Philippe,Fernandez, Marine,Perot, Thomas,Ameglio, Thierry,&Balandier, Philippe.(2018).Carry-over benefit of high internal N pool on growth and function of oak seedlings (Quercus petraea) competing with Deschampsia cespitosa.FOREST ECOLOGY AND MANAGEMENT,419,130-138. |
MLA | Vernay, Antoine,et al."Carry-over benefit of high internal N pool on growth and function of oak seedlings (Quercus petraea) competing with Deschampsia cespitosa".FOREST ECOLOGY AND MANAGEMENT 419(2018):130-138. |
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