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Species divergence in seedling leaf traits and tree growth response to nitrogen and phosphorus additions in an evergreen broadleaved forest of subtropical China

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Journal of Forestry Research 2023年第1期34卷 137-150页

作者： Xuemin Ye Wensheng Bu Xiaofei Hu Bin Liu Kuan Liang Fusheng Chen Key Laboratory of National Forestry and Grassland Administration On Forest Ecosystem Protection and Restoration of Poyang Lake Watershed Jiangxi Agricultural UniversityNanchang 330045People’s Republic of China Jiangxi Provincial Key Laboratory of Silviculture College of ForestryJiangxi Agricultural UniversityNanchang 330045People’s Republic of China School of Management Nanchang UniversityNanchang 330045People’s Republic of China

Tree competitiveness generally depends on trait plasticity in response to environmental *** effects of nitrogen(N)and phosphorus(P)on leaf trait variability by species is poorly understood,especially in China’s subtropical *** study examined the seedling leaf traits and net primary productivity of all trees>5 cm DBH of two dominant species,Schima superba and Castanopsis carlesii,in an evergreen broadleaved forest fertilized with nitrogen(+N),phosphorus(+P),and nitrogen plus phosphorus(N+P).The effect of N on seedling leaf traits was stronger than P,while fertilization in general was species *** mass per unit area decreased with N for *** seedlings but not for *** N,P,and N/P ratios changed with N addition for both *** four N fractions of carboxylation,bioenergetics,cell wall,and other N metabolites in *** leaves responded significantly to fertilization,while only the cell wall in *** a leaves *** leaf functional traits,including light-saturated photosynthetic rates,water,N,and P use efficiencies,chlorophyll and non structural carbohydrate contents increased with N addition in *** a and by P addition in *** closure at the stand-level increased due to *** biomass and relative growth rate of *** a was not affected by any treatments,while both for *** significantly decreased with N+P ***,nutrient limitation may vary at a small scale among species in a subtropical forest based on their responses of seedling traits and net primary productivity to *** traits are not correlated with the net primary productivity of larger trees except for N fractions,because low light conditions induced by fertilization reduces the proportion of N allocated to photosynthesis in *** addition,acclimation differences of tree species may increase the uncertainty of community succession.

关键词： Ecophysiology Fertilization acclimation N fractions Nutrient limitation Photosynthesis relative growth rate

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growth performance and scale insect infestation of Shorea leprosula in a common garden experimental plot

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Journal of Forestry Research 2023年第3期34卷 781-792页

作者： Chin Hong Ng Kevin Kit Siong Ng Soon Leong Lee Rempei Suwa Chai Ting Lee Lee Hong Tnah Forest Research Institute Malaysia 52109 KepongSelangorMalaysia Forestry Division Japan International Research Center for Agricultural SciencesTsukubaIbaraki 305‑8686Japan

Many tree planting programmes have long been initiated to increase forest cover to mitigate the effects of global climate *** planting requires careful planning at the project level,including using suitable species with favourable ***,there is a paucity of improvement data for tropical tree *** experimental common garden of Shorea leprosula was established to study traits related to growth performance which are key factors in planting *** of *** were collected from nine geographical forest *** study the effects of genetic variation,seedlings were planted in a common environment following a randomized complete block *** performance data collected 2017‒2019,one population showed the highest coefficient for relative height growth,significantly higher than most of the other ***,this population from Beserah also exhibited the lowest coefficient for scale insect *** study provides preliminary results on growth performance and susceptibility to scale insect infestation in *** and the first common garden experiment site conducted on dipterocarp *** lays a foundation for future genome-wide studies.

关键词： Root collar diameter Height Scale insect relative growth rate Dipterocarp

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relative position of seeds driven the seedling growth are mediated by root-leaf traits

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Journal of Plant Ecology 2024年第2期17卷 24-35页

作者： Jing Zhu Xue-Lin Wang Xing Jin Lan Jiang Hong-Yu Lin Yang Hu Jin-Fu Liu Zhong-Sheng He College of Forestry Fujian Agriculture and Forestry UniversityFuzhou 350002China Key Laboratory of Fujian Universities for Ecology and Resource Statistics Fujian Agriculture and Forestry UniversityFuzhou 350002China Zhenjiang Natural Resources and Planning Bureau Economic and Technological Development Zone Branch Zhenjiang 212132China

Variations in plant traits are indicative of plant adaptations to forest environments,and studying their relationships with tree growth provides valuable insights into forest *** spatial arrangement of plant seeds within the forest litter or soil critically infuences the variations of root-leaf traits,thereby affecting the adaptive strategies of emerging ***,our current understanding of the impacts of individual root-leaf traits on seedling growth in different relative position,and whether these traits together affect growth,remains *** study focuses on the dominant tree species,Castanopsis kawakamii,within the Sanming *** Nature Reserve of *** present experiment aimed to examine the variations in root-leaf traits of seedling,focus on the relative positions of seeds within different layers:beneath or above the litter layer,or within the bare soil layer(without litter).Our fndings provided evidence supporting a coordinated relationship between root and leaf traits,wherein leaf traits varied in conjunction with root traits in the relative positions of ***,we observed that seedlings exhibited higher values for specifc leaf area and average root diameter,while displaying lower root tissue *** mixed model explained 86.1%of the variation in root-leaf traits,surpassing the variation explained by the relative ***,soil nitrogen acted as a mediator,regulating the relationship between seedling growth and root-leaf traits,specifcally leaf dry matter content and root tissue ***,future studies should consider artifcially manipulating tree species diversity based on root-leaf traits characteristics to promote forest recovery.

关键词： relative growth rate coordination leaf traits root traits soil nitrogen content seed relative positions

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Seedling dynamics differ between canopy species and understory species in a tropical seasonal rainforest,SW China

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Plant Diversity 2024年第5期46卷 671-677页

作者： Libing Pan Xiaoyang Song Wenfu Zhang Jie Yang Min Cao CAS Key Laboratory of Tropical Forest Ecology Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMenglunMengla 666303YunnanChina College of Life Sciences University of Chinese Academy of SciencesBeijing 100049China

We used 11 years of census data from 450 seedling quadrats established in a 20-ha forest dynamics plot to study seedling dynamics in tree species of a tropical seasonal rainforest in Xishuangbanna,southwestern *** found that overall seedling recruitment rate and relative growth rate were higher in the rainy season than in the dry *** the recruitment rate of seedlings from canopy tree species(two species)and the relative growth rate of seedlings from understory species(nine species)were higher in the rainy season than in the dry ***,in the rainy season,the recruitment rate of seedlings was higher for canopy tree species than for understory tree *** addition,relative growth rate of seedlings was higher in the canopy species than in understory seedlings in the dry *** also observed that,in both rainy and dry seasons,mortality rate of seedlings was higher for canopy species than for understory ***,canopy tree species appear to have evolved a flexible strategy to adapt to the seasonal changes of a monsoon *** contrast,understory tree species seem to have adopted a conservative ***,these species mainly release seedlings in the rainy season and maintain relatively stable populations with a lower mortality rate and recruitment rate in both dry and rainy *** study suggests that canopy and understory seedling populations growing in forest understory may respond to future climate change scenarios with distinct regeneration strategies.

关键词： Tropical forest Tree seedling Seasonality Recruitment Mortality relative growth rate

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Effects of Light on the growth and Clonal Reproduction of Ligularia virgaurea

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Journal of Integrative Plant Biology 2008年第8期50卷 1015-1023页

作者： Man-Tang Wang Zhi-Gang Zhao Guo-Zhen Du Yan-Long He Key Laboratory of Arid and Grassland Agroecology under the Ministry of Education Lanzhou University Lanzhou 730000 China

Ligularia virgaurea is a perennial herb that is widely distributed in the alpine meadow on the eastern Qinghai-Tibet plateau. We investigated the patterns of growth and reproduction of L. virgaurea under two contrasting levels of light conditions for two continuous growing seasons. Our results showed that the light effects on the maximum relative growth rate, the shoot weight ratio and the root weight ratio differed between the two growing seasons. L. virgaurea reproduced initially through rhizome in the second growing season, rather than sexual reproduction. The proportion of genets with clonal reproduction decreased under shaded conditions. A minimum genet size should be attained for clonal reproduction to begin under the shaded conditions. There was a positive linear relationship between clonal reproduction and genet size. Light level affected the allocation of total biomass to clonal structures, with less allocation under the full natural irradiance than under the shaded conditions. There seemed to be a trade-off between vegetative growth and clonal reproduction under the full natural irradiance, in terms of smaller relative growth rates of genets with clonal reproduction than those without clonal reproduction. L. virgaurea emphasized clonal reproduction under the full natural irradiance, while the plant emphasized vegetative growth under the shaded conditions.

关键词： biomass allocation clonal reproduction Ligularia virgaurea relative growth rate threshold size

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Phytoremediation of Rocky Slope Surfaces: Selection and growth of Pioneer Climbing Plants

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Pedosphere 2009年第4期19卷 541-544页

作者： WANG Zhong-Qiang WU Liang-Huan S. ANIMESH ZHU Yuan-Hong Ministry of Education Key Lab of Environmental Remediation and Ecosystem Health College of Environmental and Resource Sciences Zhejiang University Hangzhou 310029 （China） College of Urban and Environmental Sciences Northeast Normal University Changchun 130024 （China） Zhejiang Provincial Key Laboratory of Subtropical Soil and Plant Nutrition College of Environmental and Resource Sciences Zhejiang University Hangzhou 310029 （China） Department of Crop and Soil Sciences The Pennsylvania State University University Park PA 16802 （USA）

INTRODUCTION As a result of the massive construction following rapid economic growth in China, extraction of building materials from mountain resources has left behind many quarries. Those quarries usually have rocky surfaces and steep slopes. The existence of rocky slopes is not only a safety hazard but also increases soil erosion and affects landscape aesthetics. Natural restoration of vegetation on rocky slope surfaces is a very slow process, which might require hundreds of years, and is not considered an acceptable restoration strategy （Cullen et al., 1998）. Phytoremediation methods have been widely considered as a better option for vegetation establishment on rocky slope surfaces （Muzzi et al., 1997）.

关键词： relative growth rate survival rate vegetation restoration

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The negative effects of soil microorganisms on plant growth only extend to the first weeks

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Journal of Plant Ecology 2022年第4期15卷 854-863页

作者： Jing Zhang Peter G.L.Klinkhamer Klaas Vrieling T.Martijn Bezemer Institute of Biology Leiden(IBL) Leiden UniversitySylviusweg 722333BE LeidenThe Netherlands Netherlands Institute of Ecology(NIOO-KNAW) Droevendaalsesteeg 106708 PB WageningenThe Netherlands

Soil biotic communities can strongly impact plant *** this paper,we ask the question:how longlasting the effect of the soil microbial community on plant growth *** examined the plant growth rates at three stages:early,mid and late *** performed two growth experiments with Jacobaea vulgaris,which lasted 49 and 63 days in sterilized soil or live *** a third experiment,we examined the effect of the timing of soil inoculation prior to planting on the relative growth rate of *** with four different timing *** all experiments,differences in biomass of plants grown in sterilized soil and live soil increased throughout the ***,the relative growth rate of plants in the sterilized soil was only significantly higher than that of plants in the live soil in the first two to three *** the third experiment,plant biomass decreased with increasing time between inoculation and ***,our results showed that plants of *** grew less well in live soil than in sterilized *** negative effects of soil inoculation on plant mass appeared to extend over the whole growth period but arise from the negative effects on relative growth rates that occurred in the first weeks.

关键词： plant–soil interactions relative growth rate plant performance pathogenic soil microbial community

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Testing experimentally the effect of soil resource mobility on plant competition

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Journal of Plant Ecology 2014年第3期7卷 276-286页

作者： Stefanie Wilberts Matthias Suter Nina Walser Peter J.Edwards Harry Olde Venterink Dieter Ramseier Department of Biology/Chemistry Division of EcologyUniversity of OsnabrückBarbarastrasse 13Osnabrück 49076Germany Forage Production and Grassland Agroscope Reckenholz-TänikonReckenholzstrasse 1918046 ZurichSwitzerland Institute of Integrative Biology ETH ZurichUniversitätstrasse 16Zürich 8092Switzerland Plant Biology and Nature Management Vrije Universiteit BrusselPleinlaan 21050 BrusselsBelgium

Aims The volume of soil beyond a plant’s roots from which that plant is able to acquire a particular nutrient depends upon the mobility of that nutrient in the *** this reason it has been hypothesized that the strength of competitive interactions between plants vary with soil nutrient *** aimed to provide an experimental test of this *** We devised two experimental systems to investigate specifically the effect of nutrient transport rates upon intraspecific *** the first,the exchange of rhizosphere water and dissolved nutrients between two connected pots,each containing one plant,was manipulated by alternately raising and lowering the *** the second experiment,the roots systems of two competing plants were separated by partitions of differing porosity,thereby varying the plants’access to water and nutrients in the other plant's *** this second experiment,we also applied varying amounts of nutrients to test whether higher nutrient input would reduce competition when competition for light is avoided,and applied different water levels to affect nutrient concentrations without changing nutrient *** findings In both experiments,lower mobility reduced competitive effects on plant biomass and on relative growth rate(RGR),as *** the second experiment,however,competition was more intense under high nutrient input,suggesting that low nutrient supply rates reduced the strength of the superior *** effects on RGR were only evident under the low water level,suggesting that under lower nutrient concentrations,competitive effects might be less *** together,our results provide the first direct experimental evidence that a reduction in nutrient mobility can reduce the intensity of competition between plants.

关键词： belowground competition nutrient transport soil water relative growth rate

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Root growth in response to nitrogen supply in Chinese maize hybrids released between 1973 and 2009

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Science China(Life Sciences) 2011年第7期54卷 642-650页

作者： WU QiuPing CHEN FanJun CHEN YanLing YUAN LiXing ZHANG FuSuo MI GuoHua Key Laboratory of Plant-Soil Interaction MOE College of Resources and Environmental Science China Agricultural University Beijing 100193 China

Root growth has a fundamental role in nitrogen （N） use efficiency. Nevertheless, little is known about how modem breeding progress has affected root growth and its responses to N supply. The root and shoot growth of a core set of 11 representative Chinese maize （Zea mays L.） hybrids released between 1973 and 2009 were investigated under high N （4 mmol L^-1, HN） and low N （0.04 mmol L^-1, LN） levels in a solution culture system. Compared with LN, HN treatment decreased root dry weight （RDW）, the root： shoot ratio （R/S）, and the relative growth rate for root dry weight （RGRroot）, but increased the total root length （TRL） and the total lateral root length （LRL）. The total axial root length （ARL） per plant was reduced under HN, mostly in hybrids released before the 1990s. The number of seminal roots （SRN） was largely unaffected by different N levels. More recently released hybrids showed higher relative growth rates in the shoot under both HN and LN. However, the roots only showed increased RGR under HN treatment. Correspondingly, there was a positive linear relationship with the year of hybrid release for TRL, LRL and ARL under HN treatment. Together, these results suggest that while shoot growth of maize has improved, its root growth has only improved under high N conditions over the last 36 years of selective breeding in China. Improving root growth under LN conditions may be necessary to increase the N use efficiency of maize.

关键词： Root R/S ratio nitrogen relative growth rate maize breeding

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comSeedling growth of five tropical dry forest tree species in relation to light and nitrogen gradients

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Journal of Plant Ecology 2014年第3期7卷 250-263页

作者： S.N.Tripathi A.S.Raghubanshi Ecosystems Analysis Laboratory Department of BotanyBanaras Hindu UniversityVaranasiUttar Pradesh 221005India Deen Dayal Upadhyaya College University of DelhiShivaji MargKarampuraNew Delhi 110015India Institute of Environment and Sustainable Development Banaras Hindu UniversityVaranasiUttar Pradesh 221005India

Aims Increasing anthropogenic nitrogen(N)deposition has been claimed to induce changes in species composition and community dynamics.A greenhouse experiment was conducted to examine the effect of increased N availability on growth and functional attributes of seedlings of five tree species with different life history characteristics under varying *** following questions have been addressed:(i)how do the pioneer and non-pioneer species respond in absolute growth and relative growth rate(RGR)to the interaction of light and nitrogen?(ii)how does the interaction between irradiance and nitrogen availability modulate growth attributes(*** attributes)?(iii)is there any variation in growth responses between leguminous and non-leguminous species along the light and nitrogen gradients?Methods Seedlings of five tree species(Acacia catechu,Bridelia retusa,Dalbergia sissoo,Lagerstroemia parviflora and Terminalia arjuna)were subjected to twelve combinations of irradiance and N *** growth traits,including height(HT),basal area(BA),whole plant dry biomass(MD),leaf mass per unit area(LMA),leaf area ratio(LAR),net assimilation rate(NAR),RGR,biomass fractions,root-toshoot ratio(R:S)and leaf nitrogen content,were studied to analyse intra-and inter-specific responses to interacting light and N *** Findings Significant interactions for irradiance and N availability for majority of growth attributes indicates that growth and biomass allocation of seedlings were more responsive to N availability under high ***,species responded differentially to N addition and they did not follow successional *** growers(***,a shade-tolerant species and ***,a light demander)exhibited greater response to N enrichment than the fast growers(***,*** and ***).However,N-mediated increment in growth traits was greater in non-legumes(***,*** and ***)compared with that of legumes(*** and D

关键词： tropical dry forest irradiance nitrogen biomass allocation relative growth rate net assimilation rate

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