Regulatory effects of root pruning on leaf nutrients, photosynthesis, and growth of trees in a closed-canopy poplar plantation
A plantation of 5-year-old poplar Populus × euramericana cv. 'Neva' was used to study the regulatory effects of root pruning on nutrients, photosynthetic characteristics, and water-use efficiency (WUE) of leaves and growth rates of diameter at breast height (DBH; 1.3 m), tree height, and v...
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| description | A plantation of 5-year-old poplar Populus × euramericana cv. 'Neva' was used to study the regulatory effects of root pruning on nutrients, photosynthetic characteristics, and water-use efficiency (WUE) of leaves and growth rates of diameter at breast height (DBH; 1.3 m), tree height, and volume. Six root-pruning treatments were conducted with different combinations of intensity (at a distance of six, eight or ten times DBH from the trunk) and orientation (on two or four sides of the trees). Results showed that the N, P, K, photosynthetic rate, transpiration rate, and stomatal conductance of leaves were all significantly decreased by root pruning over the initial period following root pruning (30 days), but increased in the subsequent investigations. The values of the above indexes peaked in 8-2 treatment (i.e., eight times DBH distance on two sides). The leaf WUE in 8-2 treatment, and average growth rates of DBH, tree height and volume, were the highest among all treatments within 3 years of root pruning. The results indicated that the root pruning based on the appropriate selection of intensity and orientation had significant positive effects on leaf nutrients, photosynthesis, and growth of trees in a closed-canopy poplar plantation. |
| doi_str_mv | 10.1371/journal.pone.0197515 |
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'Neva' was used to study the regulatory effects of root pruning on nutrients, photosynthetic characteristics, and water-use efficiency (WUE) of leaves and growth rates of diameter at breast height (DBH; 1.3 m), tree height, and volume. Six root-pruning treatments were conducted with different combinations of intensity (at a distance of six, eight or ten times DBH from the trunk) and orientation (on two or four sides of the trees). Results showed that the N, P, K, photosynthetic rate, transpiration rate, and stomatal conductance of leaves were all significantly decreased by root pruning over the initial period following root pruning (30 days), but increased in the subsequent investigations. The values of the above indexes peaked in 8-2 treatment (i.e., eight times DBH distance on two sides). The leaf WUE in 8-2 treatment, and average growth rates of DBH, tree height and volume, were the highest among all treatments within 3 years of root pruning. The results indicated that the root pruning based on the appropriate selection of intensity and orientation had significant positive effects on leaf nutrients, photosynthesis, and growth of trees in a closed-canopy poplar plantation.</description><identifier>ISSN: 1932-6203</identifier><identifier>EISSN: 1932-6203</identifier><identifier>DOI: 10.1371/journal.pone.0197515</identifier><identifier>PMID: 29782538</identifier><language>eng</language><publisher>United States: Public Library of Science</publisher><subject>Biology and Life Sciences ; Biomass ; Botanical research ; Canopies ; China ; Conductance ; Crop Production - methods ; Deciduous trees ; Drought ; Growth rate ; Leaves ; Medicine and Health Sciences ; Nutrients ; Phosphorus - metabolism ; Photosynthesis ; Physiological aspects ; Plant Leaves - growth & development ; Plant nutrition ; Plant Roots - metabolism ; Plant Transpiration ; Plantations ; Poplar ; Populus ; Populus - anatomy & histology ; Populus - growth & development ; Populus - metabolism ; Populus euramericana ; Potassium - metabolism ; Pruning ; Resistance ; Sodium - metabolism ; Soil fertility ; Stomata ; Stomatal conductance ; Transpiration ; Trees ; Trees - anatomy & histology ; Trees - growth & development ; Trees - metabolism ; Water use</subject><ispartof>PloS one, 2018-05, Vol.13 (5), p.e0197515-e0197515</ispartof><rights>COPYRIGHT 2018 Public Library of Science</rights><rights>2018 Jing et al. This is an open access article distributed under the terms of the Creative Commons Attribution License: http://creativecommons.org/licenses/by/4.0/ (the “License”), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. 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'Neva' was used to study the regulatory effects of root pruning on nutrients, photosynthetic characteristics, and water-use efficiency (WUE) of leaves and growth rates of diameter at breast height (DBH; 1.3 m), tree height, and volume. Six root-pruning treatments were conducted with different combinations of intensity (at a distance of six, eight or ten times DBH from the trunk) and orientation (on two or four sides of the trees). Results showed that the N, P, K, photosynthetic rate, transpiration rate, and stomatal conductance of leaves were all significantly decreased by root pruning over the initial period following root pruning (30 days), but increased in the subsequent investigations. The values of the above indexes peaked in 8-2 treatment (i.e., eight times DBH distance on two sides). The leaf WUE in 8-2 treatment, and average growth rates of DBH, tree height and volume, were the highest among all treatments within 3 years of root pruning. The results indicated that the root pruning based on the appropriate selection of intensity and orientation had significant positive effects on leaf nutrients, photosynthesis, and growth of trees in a closed-canopy poplar plantation.</description><subject>Biology and Life Sciences</subject><subject>Biomass</subject><subject>Botanical research</subject><subject>Canopies</subject><subject>China</subject><subject>Conductance</subject><subject>Crop Production - methods</subject><subject>Deciduous trees</subject><subject>Drought</subject><subject>Growth rate</subject><subject>Leaves</subject><subject>Medicine and Health Sciences</subject><subject>Nutrients</subject><subject>Phosphorus - metabolism</subject><subject>Photosynthesis</subject><subject>Physiological aspects</subject><subject>Plant Leaves - growth & development</subject><subject>Plant nutrition</subject><subject>Plant Roots - metabolism</subject><subject>Plant Transpiration</subject><subject>Plantations</subject><subject>Poplar</subject><subject>Populus</subject><subject>Populus - 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Academic</collection><collection>PubMed Central (Full Participant titles)</collection><collection>DOAJ Directory of Open Access Journals</collection><jtitle>PloS one</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Jing, Da-Wei</au><au>Du, Zhen-Yu</au><au>Wang, Ming-You</au><au>Wang, Qing-Hua</au><au>Ma, Hai-Lin</au><au>Liu, Fang-Chun</au><au>Ma, Bing-Yao</au><au>Dong, Yu-Feng</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Regulatory effects of root pruning on leaf nutrients, photosynthesis, and growth of trees in a closed-canopy poplar plantation</atitle><jtitle>PloS one</jtitle><addtitle>PLoS One</addtitle><date>2018-05-21</date><risdate>2018</risdate><volume>13</volume><issue>5</issue><spage>e0197515</spage><epage>e0197515</epage><pages>e0197515-e0197515</pages><issn>1932-6203</issn><eissn>1932-6203</eissn><abstract>A plantation of 5-year-old poplar Populus × euramericana cv. 'Neva' was used to study the regulatory effects of root pruning on nutrients, photosynthetic characteristics, and water-use efficiency (WUE) of leaves and growth rates of diameter at breast height (DBH; 1.3 m), tree height, and volume. Six root-pruning treatments were conducted with different combinations of intensity (at a distance of six, eight or ten times DBH from the trunk) and orientation (on two or four sides of the trees). Results showed that the N, P, K, photosynthetic rate, transpiration rate, and stomatal conductance of leaves were all significantly decreased by root pruning over the initial period following root pruning (30 days), but increased in the subsequent investigations. The values of the above indexes peaked in 8-2 treatment (i.e., eight times DBH distance on two sides). The leaf WUE in 8-2 treatment, and average growth rates of DBH, tree height and volume, were the highest among all treatments within 3 years of root pruning. The results indicated that the root pruning based on the appropriate selection of intensity and orientation had significant positive effects on leaf nutrients, photosynthesis, and growth of trees in a closed-canopy poplar plantation.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>29782538</pmid><doi>10.1371/journal.pone.0197515</doi><tpages>e0197515</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | Biology and Life Sciences Biomass Botanical research Canopies China Conductance Crop Production - methods Deciduous trees Drought Growth rate Leaves Medicine and Health Sciences Nutrients Phosphorus - metabolism Photosynthesis Physiological aspects Plant Leaves - growth & development Plant nutrition Plant Roots - metabolism Plant Transpiration Plantations Poplar Populus Populus - anatomy & histology Populus - growth & development Populus - metabolism Populus euramericana Potassium - metabolism Pruning Resistance Sodium - metabolism Soil fertility Stomata Stomatal conductance Transpiration Trees Trees - anatomy & histology Trees - growth & development Trees - metabolism Water use |
| title | Regulatory effects of root pruning on leaf nutrients, photosynthesis, and growth of trees in a closed-canopy poplar plantation |
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