Rubber tree allometry, biomass partitioning and carbon stocks in mountainous landscapes of sub-tropical China

Yang, Xueqing; Blagodatsky, Sergey; Liu, Feng; Beckschäfer, Philip; Xu, Jianchu; Cadisch, Georg

doi:10.1016/j.foreco.2017.08.013

Cited by 28 publications

(31 citation statements)

References 65 publications

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“…Another difference between rubber and tea plantations is the sylvicultural practices. In rubber plantations, rubber trees are usually in rows with individual trees about 2–3 m apart within row space and rows are 5–7 m apart (Yang et al, ); however, smallholder farmers do not always follow these standards and keep the inter‐row distance around 3.5–4 m and intra‐row tree distance around 2.5 m. All of these are the reasons why Xishuangbanna rubber plantations are termed highly dense. The woody trees in tea plantations are haphazardly placed or left in the plantation matrix.…”

Section: Discussionmentioning

confidence: 99%

Roads as drivers of above‐ground biomass loss at tropical forest edges in Xishuangbanna, Southwest China

et al. 2019

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Roads are an increasingly important anthropogenic disturbance to tropical ecological systems. Although the ecological impacts of roads are now well recognised, there remains a lack of certainty regarding how roads in general and roads with different widths affect vital ecosystem services such as above-ground biomass (AGB) in tropics. Using a non-destructive sampling method, we investigated disturbance effects of roads on AGB and related attributes in Xishuangbanna, China. We surveyed woody plants in natural forests, rubber plantations, and tea plantations up to 100 m from the edge of three different road widths and estimated AGB using allometric equations at 10 m intervals. Two sample t-test results confirmed that natural forests stored more AGB than rubber and tea plantations, and less AGB at edges of wider road than at edges of narrower road. Linear mixed effects models revealed that land use, road width, and distance from edge significantly explained 68% (both fixed and random factors) variation in AGB. We observed two results that indicated wider roads altered more AGB than narrower road types in natural forests. First, AGB declined at road edges; second, the disturbance effects on AGB by wider road types went deeper than narrower roads did in natural forests. Our results suggest that both widening the existing roads and construction of new roads will degrade ecosystem productivity.We recommend that impacts assessments of roads on AGB should be considered and taken serious while planning and designing roads to avoid serious damages to many ecosystem services that AGB provides.

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Section: Discussionmentioning

confidence: 99%

Roads as drivers of above‐ground biomass loss at tropical forest edges in Xishuangbanna, Southwest China

et al. 2019

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“…In the studies of Di et al and Nicoll et al, an asymmetric growth characteristic on both sides of the slope of the root distribution was found [20,21]. Furthermore, the root biomass is increased with the growth of seeding but showing different increments in the same time interval; that is, the growth rate of root biomass is not uniform [22,23]. However, in the juvenile stages of soil bioengineering plants, the proportion of adventitious roots is prominent [24], and there is still an absence of knowledge on whether a living brush mattress planted in riparian zones has these features.…”

Section: Introductionmentioning

confidence: 93%

Spatio-Temporal Dynamic Architecture of Living Brush Mattress: Root System and Soil Shear Strength in Riverbanks

Zhang

Cheng

Liu

et al. 2018

Forests

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Abstract:As a basal measure of soil bioengineering, the living brush mattress has been widely applied in riparian ecological protection forest construction. The living brush mattress shows favorable protective effects on riverbanks. However, there are few reports on the root structure and the soil strengthening benefit of the living brush mattress. The present work reports a series of experiments on root morphology and soil shear strength enhancement at the temporal and spatial scales. The object of the study is 24 living brush mattress trees constructed with Salix alba L. 'Tristis' (LBS hereafter). Traditional root morphology and mechanical measurement methods were used to collect the parameters. The results showed that the root systems of LBS had the characteristics of symmetry and upslope growth. The roots were mainly distributed in a cylindrical region of the soil (radius × thickness: 0.4 m × 0.5 m) and their biomass increased with different growth rates for the periods from 1 to 5 and from 5 to 7 years. Both age and slope position were factors that influence root growth. The root diameter falls within 0-5 mm, has a significant effect on the soil shear strength and provides a conical-shape potentiation zone to ensure the efficient protection of a riverbank. The results of this study demonstrate that LBS is an efficient and feasible engineering measure in the field of riverbank protection.

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“…reported in some studies. The variability in stand biomass in the literature might also be attributable to factors directly influencing tree growth related to inherent environmental parameters, such as climate (Munasinghe et al, 2014;Wauters et al, 2008), elevation (Yang et al, 2017), but also related to management practices such as the stocking density and planting design (Wauters et al, 2008).…”

Section: Biomass Accumulation In Rubber Plantationsmentioning

confidence: 99%

Dynamics of biomass and nutrient accumulation in rubber (Hevea brasiliensis) plantations established on two soil types: Implications for nutrient management over the immature phase

Perron

Mareschal

Laclau

et al. 2021

Industrial Crops and Products

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Rubber trees are the main source of natural rubber (NR). The area occupied by rubber plantations rose from 3.9 million ha in 1961 to 12.5 million ha in 2018. Both the expansion of rubber plantations in marginal zones (prone to biotic and abiotic stress), and long-term rubber tree cultivation in traditional areas, raise questions about the sustainability of NR production in a context of climate change. Our study set out to gain insights into the biogeochemical cycles in rubber plantations, for a better matching of fertilizer inputs to the dynamics of nutrient demand throughout rubber tree growth. Nutrient accumulation in tree biomass is a major component of the biological cycle in tree plantations. We studied the dynamics of biomass and nutrient accumulation in two chronosequences covering the whole lifespan of a plantation in Ivory Coast managed on a sandy soil at the SAPH site, and one on a clayey soil at the SOGB site. In total, 56 trees were destructively sampled in 2-, 5-, 20-and roughly 40-year-old stands. While the use of allometric relationships is common for estimating nutrient stocks in planted forests, this study was the first to provide allometric equations predicting nutrient stocks in rubber tree components. Allometric models were applied to the inventory of 4 commercial stands, for each age at each site, to estimate stand biomass and nutrient stocks. The current annual increments of nutrient stocks in tree biomass peaked between 2 and 5 years after planting. They reached 80 kg ha-1 yr-1 for N, 14 kg ha-1 yr-1 for P and 34 kg ha-1 yr-1 for K at SAPH (53, 7, and 39 kg ha-1 yr-1 respectively at SOGB), which highlighted the importance of an appropriate fertilization schedule for young rubber trees. At the clear-cut age (38-40 years), the amounts of nutrients accumulated in tree biomass were 970 kg N ha-1 , 188 kg P ha-1 , 366 kg K ha-1 , 941 kg Ca ha-1 and 255 kg Mg ha-1 on the sandy soil at SAPH (907,118, 629 1499, and 375 kg ha-1 respectively on the clayey soil at SOGB). Contrasting soil properties and management practices at the two sites had a much greater effect on the amounts of P, K, Ca and Mg accumulated in the trees than on N accumulation. Logging practices in rubber plantations can lead to considerable nutrient exports on poor tropical soils. Harvest residues should be distributed uniformly in the plots so that the roots of young trees can quickly gain access to the nutrients released during decomposition.

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Rubber tree allometry, biomass partitioning and carbon stocks in mountainous landscapes of sub-tropical China

Cited by 28 publications

References 65 publications

Roads as drivers of above‐ground biomass loss at tropical forest edges in Xishuangbanna, Southwest China

Roads as drivers of above‐ground biomass loss at tropical forest edges in Xishuangbanna, Southwest China

Spatio-Temporal Dynamic Architecture of Living Brush Mattress: Root System and Soil Shear Strength in Riverbanks

Dynamics of biomass and nutrient accumulation in rubber (Hevea brasiliensis) plantations established on two soil types: Implications for nutrient management over the immature phase

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