DOI: 10.1016/j.foreco.2016.03.054
Scopus记录号: 2-s2.0-84962147264
论文题名: Impact of leaf removal on initial survival and growth of container-grown and bare-root seedlings of Hinoki cypress (Chamaecyparis obtusa)
作者: Yamashita N. ; Okuda S. ; Suwa R. ; Lei T.T. ; Tobita H. ; Utsugi H. ; Kajimoto T.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 370 起始页码: 76
结束页码: 82
语种: 英语
英文关键词: Compensatory response
; Defoliation
; Root allocation
; Tree seedling survival
; Water balance
Scopus关键词: Containers
; Forestry
; Plants (botany)
; Compensatory response
; Defoliation
; Root allocation
; Tree seedlings
; Water balance
; Seed
; compensation
; coniferous tree
; defoliation
; forest management
; growing season
; growth rate
; leaf morphology
; mortality
; resource allocation
; root
; seedling
; survival
; water budget
; Chamaecyparis obtusa
; Cupressus
英文摘要: As a part of improving forest management practices, we tested the idea that partial defoliation of container-grown and bare-root Hinoki cypress (Chamaecyparis obtusa) seedlings prior to outplanting can reduce transplant shock and enhance seedling survival during their first growing season after transplanting. For container-grown seedlings, the remaining leaves of defoliated seedlings showed photosynthetic capacity (Amax) about 1.5 times higher than the non-defoliated control in the first 3 weeks. For defoliated bare-root seedlings, Amax ranged 3.3-4.8 times higher than non-defoliated control in the first 4 weeks after transplanting. Thereafter, Amax of defoliated seedlings of both types began to decrease slowly. Amax of newly emerged leaves after transplanting was significantly higher than that of existing leaves for container-grown seedlings but not bare-root seedlings. For container-grown seedlings, both defoliated and non-defoliated plants showed high survival rate (>90%) and there were no significant differences among levels of defoliation. For bare-root seedlings, non-defoliated control showed highest mortality (30%) by the end of the growing season but seedlings that were 25%, 50%, 75% defoliated all suffered little mortality. In terms of initial growth, there was no significant difference between defoliated and non-defoliated control in container seedlings suggesting that defoliation treatment had no effect on reducing their growth. In comparison, bare-root seedlings showed marginally but significantly greater height growth in defoliated plants, suggesting that non-defoliated seedlings suffered greater transplant shock and reducing the amount of leaves may contribute to minimize water stress and mortality. Therefore, we found that for bare-root seedlings, partial defoliation can effectively reduce transplant shock resulting in high survivorship and growth performance; the lack of defoliation response in container-grown seedlings would suggest that defoliation is unnecessary for improving their transplant success. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64937
Appears in Collections: 影响、适应和脆弱性
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作者单位: Forest Ecology Group, Kansai Research Centre, Forestry and Forest Products Research Institute, 68 Nagaikyutaroh, Momoyama, Fushimi, Kyoto, Japan; Department of Environmental Solution Technology, Ryukoku University, 1-5 Yokoya, SetaOhe, Otsu, Shiga, Japan; Department of Plant Ecology, Forestry and Forest Products Research Institute, 1 Matsunosato, Tsukuba, Ibaraki, Japan
Recommended Citation:
Yamashita N.,Okuda S.,Suwa R.,et al. Impact of leaf removal on initial survival and growth of container-grown and bare-root seedlings of Hinoki cypress (Chamaecyparis obtusa)[J]. Forest Ecology and Management,2016-01-01,370