Growth, biomass, carbon and nutrient pools in Gmelina arborea established in pure and mixed forest stand production systems in Mexico

Blandon, Bayron Alexander Ruiz; Salcedo-Pérez, Eduardo; Rodríguez-Macías, Ramón; Álvarez, Efrén Hernández; Campo, Julio; Merino, Agustı́n

doi:10.1007/s11056-021-09878-7

Cited by 6 publications

(5 citation statements)

References 42 publications

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“…The introduction of trees improves the potential of agricultural lands to store soil organic carbon [9,[77][78][79][80]. Numerous authors report greater stocks of carbon in agroforestry than in field crops [9,81].…”

Section: Discussion 41 Carbon Stored By the Afsmentioning

confidence: 99%

Assessment of a Cocoa-Based Agroforestry System in the Southwest of Colombia

2022

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Cocoa-based agroforests play an important role in farmer livelihood and the global environment; however, despite these facts, their low yields and tree aging put at risk their fate. This project investigated the carbon storage potential, productivity, and economics of different agroforestry arrangements of cocoa (Theobroma cacao) with Melina (Gmelina arborea) trees, in the southwest of Colombia. We established the experiment under a Randomized Complete Blocks design with seven treatments and three repetitions. Different allometric models were tested. Allometric models were made for G. arborea trees with dbh, ranging between 30.24 and 50.11 cm. The total carbon accumulation fluctuated between 49.2 (Treatment 4) and 88.5 t ha−1 (Treatment 2), soil organic matter (SOM) ranged between 9 and 17%, bulk density decreased from 0.83 to 0.77 g cm−3. Cocoa yield ranged between 311 kg ha−1 year−1 (Treatment 7, traditional farm) and 922 kg ha−1 year−1 (Treatment 6). Treatment 6 showed the best performance with a net present value (NPV) of COP 1,446,467 (US $337.6), an internal rate of return (IRR) of 42%, and a cost-benefit ratio (B/C) of 1.67%. The benefits of AFS were also evidenced in some of the physical and chemical soil properties. Despite local marginality, these cocoa agroforest arrangements are a viable alternative to improve the traditional (local) cocoa systems because cacao agroforest arrangements increased cacao yield and carbon storage becoming a suitable alternative to improve traditional systems.

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Section: Discussion 41 Carbon Stored By the Afsmentioning

confidence: 99%

Assessment of a Cocoa-Based Agroforestry System in the Southwest of Colombia

2022

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“…However, Ca uptake is proportional to biomass growth throughout the cycle, while Mg uptake is higher in the first years and then stabilizes (Laclau et al, 2010). Considering the possible benefits of the silvopastorol system on SOM, the export of large amounts of nutrients could be reduced by selecting other forest species, such as native species, and also establishing mixed plantations with legume species (Carballo‐Balieiro et al, 2008; Ruiz‐Blandon et al, 2022).…”

Section: Discussionmentioning

confidence: 99%

Evaluation of the effects of conservation practices carried out in the 1970s on soil properties in the Eastern Region of Paraguay

2022

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Soils in subtropical and tropical regions are extremely fragile to perturbations due to their sandy texture, acid nature, low soil organic carbon (SOC) and low cation exchange capacity. In Paraguay, deforestation and subsequent cultivation affect 60% of the land. Certain conservation practices were carried out in the 1970s in response to the important degree of degradation caused by the soil degradative processes.Although the management of crop soils is still very intensive, to date there is no data on how the practices are affecting the sustainability of the system. The objective of this study was to evaluate the chemical and physical properties of three subtropical soils (Ultisol, Alfisol and Oxisol) under different agricultural systems and types of management, aimed at conservation, in the Eastern Region of Paraguay. The agricultural systems differ in the main crop (soybean or maize) and rotation crop (oat, turnip, crotalaria, lupins, maize). The soil properties were compared with those in disturbed natural forests and eucalypt plantations established on former agricultural land. The physical and chemical properties of the soil were determined in the 0 to 40 cm layer.The soils in the disturbed natural forest systems were less acidic and contained more Ca, Mg and K than the cultivated soils. Relative to the seminatural forests, the cultivated soils contained 20 to 40% less SOC and had lower macronutrient reserves and higher bulk density (up to 1.45 g cm À3 ). The SOC was higher in the agricultural systems with oats sown as a rotation crop in winter. By contrast, the N content was higher in systems with lupins or turnips grown in winter. Even when managed using conservation practices (direct sowing, retention of harvest residues, green manure), the soils in the agricultural systems under study displayed signs of physical and chemical degradation. The findings show that these conservation practices are not sufficient to correct the impact of intensive agricultural management.

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“…Reference source not found.]. Similarly, in a mixed plantation of Gmelina arborea and Cordia alliodora, it was observed that G. arborea accounted for 40% of the total stand volume compared to 21% by C. alliodora [30].…”

Section: Effects Of Species Mixture On the Growth Of Acacia Cincinnatamentioning

confidence: 91%

Effects of Species Mixture on Growth, Biomass of Understory Vegetation, Soil Properties, and Bacterial Diversity of Acacia cincinnata Plantation

Li¹,

Sun²,

Wang³

et al. 2023

Preprint

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Establishment of mixed-forests has gained increasing attention as a way to optimize forest production, to improve ecological benefits and as a safety net for impacts of future climate uncertainties. However, practical knowledge about which species and what proportion of them should be mixed is still lacking. Thus, this study was conducted with the aim of identify suitable species for mixture with Acacia cincinnata. The mixture tested in the present study was A. cincinnata + Eucalyptus robusta (6:4), A. cincinnata + Acacia mangium (3:1) and monospecifc plantation of A. cincinnata established in 2014. After 7 years of growth, we analyzed the effects of species mixture on growth of tree species, understory vegetation and soil physico-chemical properties as well as bacterial community structure and diversity. The results showed that species mixture had no significant effect on growth characteristics, such as diameter and singletree volume of A. cincinnata. However, mixed-species planting increased the total stocking volume compered to monospecific plantation of A. cincinnata. Furthermore, stand mixture significantly increased species diversity, biomass and nutrient stocks in the understory vegetation. The soil of mixed stand of A. cincinnata and A. mangium had the highest C and N contents, whereas the soil of pure A. cincinnata stand had the highest P content. The diversity of soil bacterial community were the highest in the mixed stand of A. cincinnata and E- robusta, followed by pure A. cincinnata stand and A. cincinnata + A. mangium stand. The relative abundance of Proteobacteria and Actinobacteria was higher in soils of mixed stands. Furthermore, the relative abundance of Firmicutes was high in the soil of A. cincinnata + A. mangium while the relative abundance of Verrucomicrobia was high in A. cincinnata + E. robusta stand. As a whole, the study demonstrated that establishing mixed-species plantation enhance the diversity and composition of understory vegetation, soil physico-chemical and soils bacterial community; thereby increasing biodiversity, nutrient cycling and carbon sequestration in the biomass and soil. From the viewpoints of forest productivity and ecological benefits, it is advisable to establish a mixed plantation of A. cincinnata and A- mangium in southern China. As a whole, our work revealed that the sustainability of mixed-species plantation relies on the interactions between soil attributes, vegetation, and bacterial community.

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Growth, biomass, carbon and nutrient pools in Gmelina arborea established in pure and mixed forest stand production systems in Mexico

Cited by 6 publications

References 42 publications

Assessment of a Cocoa-Based Agroforestry System in the Southwest of Colombia

Assessment of a Cocoa-Based Agroforestry System in the Southwest of Colombia

Evaluation of the effects of conservation practices carried out in the 1970s on soil properties in the Eastern Region of Paraguay

Effects of Species Mixture on Growth, Biomass of Understory Vegetation, Soil Properties, and Bacterial Diversity of Acacia cincinnata Plantation

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