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Importance of overstorey attributes for understorey litter production and nutrient cycling in European forests

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Forest Ecosystems 2020年第4期7卷 591-601页

作者： Dries Landuyt Evy Ampoorter Cristina CBastias Raquel Benavides Sandra Müller Michael Scherer-Lorenzen Fernando Valladares Safaa Wasof Kris Verheyen Forest&Nature Lab Department of EnvironmentGhent UniversityGhentBelgium LINCGlobal Department of Biogeography and Global ChangeNational Museum of Natural Science-CSICMadridSpain Faculty of Biology GeobotanyUniversity of FreiburgFreiburg im BreisgauGermany.

Background:In contrast with the negligible contribution of the forest understorey to the total aboveground phytobiomass of a forest,its share in annual litter production and nutrient cycling may be more *** and how this functional role of the understorey differs across forest types and depends upon overstorey characteristics remains to be ***:We sampled 209 plots of the FunDivEUROPE Exploratory Platform,a network of study plots covering local gradients of tree diversity spread over six contrasting forest types in *** estimate the relative contribution of the understorey to carbon and nutrient cycling,we sampled non-lignified aboveground understorey biomass and overstorey leaf litterfall in all *** samples were analysed for C,N and P concentrations,overstorey leaf litterfall for C and N *** additionally quantified a set of overstorey attributes,including species richness,proportion of evergreen species,light availability(representing crown density)and litter quality,and investigated whether they drive the understorey’s contribution to carbon and nutrient *** and conclusions:Overstorey litter production and nutrient stocks in litterfall clearly exceeded the contribution of the understorey for all forest types,and the share of the understorey was higher in forests at the extremes of the climatic *** most of the investigated forest types,it was mainly light availability that determined the contribution of the understorey to yearly carbon and nutrient *** species richness did not affect the contribution of the understorey to carbon and nutrient cycling in any of the investigated forest types.

关键词： FunDivEUROPE nutrient cycling Litter production Understorey Overstorey Tree species richness Light availability Litter quality Proportion evergreen tree species

Biomass production,nutrient cycling and distribution in age-sequence Chinese fir(Cunninghamia lanceolate)plantations in subtropical China

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Journal of Forestry Research 2016年第2期27卷 357-368页

作者： Lili Zhou Addo-Danso Daniel Shalom Pengfei Wu Zongming He Chunhua Liu Xiangqing Ma Forestry College Fujian Agriculture and Forestry UniversityFuzhou 350002People's Republic of China Chinese Fir Engineering Technology Research Center of the State Forestry Administration Fuzhou 350002People's Republic of China Department of Forest and Conservation Sciences Faculty of ForestryUniversity of British Columbia2424 Main MallVancouverBC V6T 1Z4Canada Ecosystem Services and Climate Change Division CSIR-Forestry Research Institute of GhanaBox 63 KNUSTKumasiGhana Xinkou Experimental Forest Farm of Fujian Agriculture and Forestry University Sanming 365002People's Republic of China

Biomass production and nutrient （N, P, K, Ca and Mg） accumulation, distribution and cycling were quantified in young, mature and over-mature （10-, 22-, and 34-year old） Chinese fir [Cunninghamia lanceolate （Lamb.） Hook] plantations in southern China. Total stand biomass of young, mature and over-mature stands was 38, 104 and 138 t ha-1 respectively. Biomass production increased significantly with age. Stem wood represented the highest percentage of stand biomass, accounting for 41, 55 and 63 % in the young, mature and over-mature plan- tations respectively. nutrients concentration was highest in live needles and branches, and lowest in stem wood. The plantations accumulated more N, followed by K, Ca, Mg, and P. nutrient return amount, nutrient utilization effi- ciency, nutrient turnover time, the ratio of nutrient return and uptake increased with stand age, which implies that young Chinese fir deplete soil nutrients to maintain growth, and efficiently utilize nutrients to decrease dependence on soil nutrients as they age. Harvesting young Chinese fir plantations would therefore lead to high nutrient loss, but prolonging the rotation length could improve soil recovery, and help sustain productivity in the long-term. Improved nutrient return through litterfall as stands get older may also be beneficial to nutrient pool recovery.

关键词： Cunninghamia lanceolate Biomassproduction nutrient distribution nutrient cycling

Association of biochar properties with changes in soil bacterial,fungal and fauna communities and nutrient cycling processes

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Biochar 2021年第3期3卷 239-254页

作者： Zhongmin Dai Xinquan Xiong Hang Zhu Haojie Xu Peng Leng Jihui Li CTang Jianming Xu Institute of Soil and Water Resources and Environmental Science College of Environmental and Resource SciencesZhejiang UniversityHangzhou 310058China Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment Zhejiang UniversityHangzhou 310058China The Rural Development Academy Zhejiang UniversityHangzhou 310058China Linyi City Academy of Agricultural Sciences Linyi 276012ShandongChina Department of Animal Plant and Soil SciencesLa Trobe UniversityMelbourne CampusBundooraVIC 3086Australia Shangdong(Linyi)Institute of Modern Agriculture Zhejiang UniversityHangzhou 310058China

Soil microorganisms play crucial roles in soil nutrient cycling,carbon sequestration,fertility maintenance and crop health and *** date,the responses of microorganisms,such as microbial activity,diversity,community structure and nutrient cycling processes,to biochar addition have been widely ***,the relationships between soil microbial groups(bacteria,fungi and microscopic fauna)and biochar physicochemical properties have not been *** this review,we conclude that biochar affects soil microbial growth,diversity and community compositions by directly provid-ing growth promoters for soil biota or indirectly changing soil basic *** porous structure,labile C,high pH and electrochemical properties of biochar play an important role in determining soil microbial abundance and communities,and their mediated N and P cycling processes,while the effects and underlying mechanisms vary with biochar types that are affected by pyrolysis temperature and feedstock ***,we highlight some issues related to research methodology and subjects that are still poorly understood or controversial,and the perspectives for further research in microbial responses to biochar addition.

关键词： Biochar property Microbial communities Diversity Enzyme nutrient cycling Crop health

nutrient cycling characteristics of Quercus acutissima and Pinus massoniana mixed forest in the Three Gorge Reservoir area, China

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Journal of Environmental Sciences 1998年第3期10卷 123-129页

作者： Wu GangDepartment of System Ecology, Research Center for Eco Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China

The cycling characteristics of nitrogen(N), phosphorus(P) and potassium(K) of the Quercus acutissima and Pinus massoniana mixed forest which is the most common forest type in the Three Gorge Reservoir areas in China, were systematically analyzed. The results showed that N, P and K accumulated in the plant pool and in the litter pool, while total N, P, and K were deficient in the soil pool and in the forest systems. Contents of N in the soil of depth 20—40 cm were the key factor limiting growth of trees. The biological outside cycling coefficients were 878, 725 and 117 times of inside cycling coefficients of N, P and K, respectively. 3392, 1026 and 1588 kg of N, P and K return to the litter pool from branches, leaves and throughfall per year, but, 1431, 132 and 1048 kg of N, P and K return to the soil from litter pool per year respectively. It is clear that 58% of N, 87% of P, and 34% of K are lost by surface runoff per year. 549%, 130%, and 834% of N, P and K withdraw from leaves to branches, 499%, 199% and 730% of N, P and K withdraw from branches to trunks per year, respectively.

关键词： nutrient cycling Q. acutissima and P. massoniana mixed forest Three Gorge Reservoir.

Productivity and nutrient cycling in an agroforestry ecosystem for interplant of pineapple and coconut

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Journal of Forestry Research 1999年第3期10卷 163-167页

作者：彭方仁黄宝龙 Nanjing Forestry University Nanjing P.R. China (GRID:grid.410625.4) Pulau Sambu Group Indonesia (GRID:grid.410625.4)

In this paper, the biomass productivity and nutrient cycling in an agroforestry system of coconut (Cocus nucifera) interplanted with pineapple (Ananas comosus) had been studied. The result showed that the biomass productivity of this ecosystem was 47 460 kg...hm2...a?1, which was 4.3 times as much as that of pure coconut plantation. In the biological cycling of N, P. K elements, the total annual retention was 559.470 kg...hm?2, the annual return was 410.745 kg...hm?2, the annual uptake was 970.475 kg...hm?2, respectively. The average circulation rate in three nutrient elements (N, P, K) was 42.32%, which was 27.53% more than that in pure coconut stands. Coconut interplanted with pineapple was proved to be one of optimum cultural patterns, which had the higher biomass productivity, and better usage efficiency of environment resources in tropical areas.

关键词： Agroforestry Biomass productivity nutrient cycling Coconut Pineapple

Current Status and Advancements in Research of Plantation nutrient cycling

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Chinese Forestry Science and Technology 2006年第2期5卷 66-74页

作者： LI Kun ZHANG Changshun SUN Yongyu Research Institute of Resources Insects Chinese Academy of Forestry Kunming 650224. P. R. China International Centre of Bamboo and Rattan Beijing100102 P. R. China

This paper introduces concepts and current research status of plantation nutrients cyclings, and analyzes main contents of plantation nutrients cycling as nutrients contents, accumulation and distribution of nutrients elements, understory species and forest litter. At the same time, the paper summarizes the problems in plantation nutrients cycling and its prospects.

关键词： nutrient cycling understory species forest litter prospects

Litter production and leaf nutrient concentration and remobilization in response to climate seasonality in the central Amazon

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Journal of Forestry Research 2024年第3期35卷 131-141页

作者： Ricardo Antonio Marenco Saul Alfredo Antezana-Vera Daniela Pereira Dias Luiz Antonio Candido Instituto Nacional de Pesquisas da Amazonia Coordenagao de Uso da Terra e Mudanca ClimaticaAv.Andre Araujo 2936ManausAM69067-375Brazil Programa de pos-Graduagao em Agricultura no Tropico Umido Instituto Nacional de Pesquisas da Amazonia-INPAManausAMBrazil Unidade Academica de Ciencias Agrarias Universidade Federal de JataiBR 364km 195JataiGO 75801-615Brazil

Litterfall is the largest source of nutrients to for-est soils of tropical ***,variability in lit-terfall production,nutrient remobilization,and changes in leaf nutrient concentration with climate seasonality remain largely unknown for the central *** study meas-ured litterfall production,leaf nutrient remobilization,and leaf area index on a forest plateau in the central *** was measured at monthly intervals during 2014,while nitrogen,phosphorus,potassium,calcium and mag-nesium concentrations of leaf litter and canopy leaves were measured in the dry and rainy seasons,and remobilization rates *** area index was also recorded in the dry and rainy *** litterfall varied from 33.2(in the rainy season)to 87.6 g m^(-2) in the dry season,while leaf area index increased slightly in the rainy *** seasonality had no effect on concentrations of nitrogen,calcium,and magnesium,whereas phosphorous and potassium responded to rainfall seasonality *** phosphorous increased,potassium decreased during the dry *** seasons,nitrogen,potassium,and phosphorous decreased in leaf litter;calcium increased in leaf litter,while magnesium remained unaffected with leaf ***,the five nutrients had similar remobilization rates over the *** absence of climate seasonality on nutrient remobilization suggests that the current length of the dry season does not alter nutrient remobilization rates but this may change as dry periods become more prolonged in the future due to climate change.

关键词： Throughfall nutrient cycling Climatic seasonality Leaf mass per area

The effects of temperature on decomposition and allelopathic phytotoxicity of boneseed litter

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Journal of Environmental Sciences 2015年第7期27卷 1-11页

作者： Md.Abdullah Yousuf Al Harun Joshua Johnson Md.Nazim Uddin Randall W.Robinson Institute for Sustainability and Innovation College of Engineering and Science Victoria UniversityMelbourne

Decomposition of plant litter is a fundamental process in ecosystem function, carbon and nutrient cycling and, by extension, climate change. This study aimed to investigate the role of temperature on the decomposition of water soluble phenolics（WSP）, carbon and soil nutrients in conjunction with the phytotoxicity dynamics of Chrysanthemoides monilifera subsp. monilifera（boneseed） litter. Treatments consisted of three factors including decomposition materials（litter alone, litter with soil and soil alone）, decomposition periods and temperatures（5-15, 15-25and 25-35°C（night/day））. Leachates were collected on 0, 5, 10, 20, 40 and 60 th days to analyse physico-chemical parameters and phytotoxicity. Water soluble phenolics and dissolved organic carbon（DOC） increased with increasing temperature while nutrients like SO-24 and NO-13 decreased. Speed of germination, hypocotyl and radical length and weight of Lactuca sativa exposed to leachates were decreased with increasing decomposition temperature. All treatment components had significant effects on these parameters. There had a strong correlation between DOC and WSP, and WSP content of the leachates with radical length of test species. This study identified complex interactivity among temperature, WSP, DOC and soil nutrient dynamics of litter occupied soil and that these factors work together to influence phytotoxicity.

关键词： Temperature Boneseed Phenolics DOC nutrient cycling Phytotoxicity

Litter removal impacts on soil biodiversity and eucalypt plantation development in the seasonal tropics

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Journal of Forestry Research 2023年第3期34卷 735-748页

作者： Jonas Inkotte Barbara Bomfim Sarah Camelo da Silva Marco Bruno Xavier Valadão Márcio Gonçalves da Rosa Roberta Batista Viana Alcides Gatto Reginaldo SPereira Department of Forestry Engineering University of BrasiliaBrasíliaDistrito FederalBrazil Climate and Ecosystem Sciences Division Lawrence Berkeley National LaboratoryBerkeleyCA 94720USA SESI/SENAI Social Service Industry Santa Catarina StateChapecóBrazil

The little layer of tree plantations provides primary nutrients for uptake,buff ers changes in soil moisture,and provides habitat and substrate to soil epigeic ***,this layer in eucalypt plantations is often removed to reduce fuel load during the fi re season in the Brazilian savanna(Cerrado).Therefore,it is necessary to quantify the eff ects of changes in litter dynamics on the function of these plantations,on key nutrient cycling processes and on epigeic fauna diversity and *** two adjacent stands(one juvenile and one mature),the consequences of two years of litter removal were quantifi ed as monthly litterfall,leaf and fi ne wood litter decomposition,epigeic fauna abundance and diversity,soil biogeochemical variables,and tree diameter and basal area *** litterfall rates in juvenile and mature stands did not change with litter removal over the study *** litterfall ranged from 4.1 to 4.9 Mg ha^(−1)a^(−1)in litter removal plots and from 3.9 to 4.8 Mg ha^(−1)a^(−1)in control *** wood litter decomposition was slower in litter removal plots compared to controls,while leaf decomposition rates were similar in *** years of litter removal in the juvenile stand did not aff ect topsoil biogeochemical parameters but decreased available phosphorus at 20–40 cm depth relative to *** the mature stand,total cation exchange capacity(0–20 cm)was higher in controls(6.4 cmol c dm^(−3))relative to litter removal plots(6.3 cmol c dm^(−3)),while soil moisture(0–40 cm depth)was lower in litter removal(25.45 m 3 m^(−3))compared to control plots(26 m^(3)m^(−3))in the dry season.A non-metric multidimensional scaling ordination revealed an increased homogeneity in epigeic fauna where litter was ***,decomposition,diameter increment,four soil physical parameters and fourteen chemical parameters at 0–20 and 20–40 cm depth explained the diff erences in soil epigeic fauna composition between litter removal and control p

关键词： Cerrado nutrient cycling Soil ecology Soil epigeic fauna Plantation management