The planting density of Acacia mangium influences the rehabilitation of a waste rock dump in Papua New Guinea

Lewis, Lawrence; Hossain, Mozaffar; K., Rajashekhar Rao B.

doi:10.1007/s12517-022-09522-4

Cited by 5 publications

(9 citation statements)

References 40 publications

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“…The intricate relationship between nodule development in Acacia and the rhizosphere has been widely recognized in previous studies (Lewis et al, 2022;Raddad et al, 2005;Vincent et al, 2018). The formation of legume nodules exerts signi cant impacts on the soil ecosystem and N availability and distribution, both directly and indirectly.…”

Section: N Enhancement Through Legume-rhizobia Symbiosis Developmentmentioning

confidence: 96%

“…Their ability to reduce water loss and enhance water absorption during drought conditions, as well as their good ionic balance between Na + and K + ions, make many Acacia species highly adaptable to drought and salinity stress (Abbas et al, 2015;Marcar et al, 1991).Therefore, Acacia spp. are also commonly introduced as an important component of native vegetation during soil rehabilitation (Ilstedt et al, 2004;Lewis et al, 2022;Thrall et al, 2005). While Acacia species have demonstrated the potential for achieving optimal rates of N xation in various soils (Vincent et al, 2018), their symbiosis e ciency and N xing capability are signi cantly in uenced by several soil biogeochemical properties (EL Sabagh et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

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Acacia nodule-associated bacteria induced plant growth promotion and soil N availability

Yu¹,

You

Wu³

et al. 2023

Preprint

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Background and aims Legume-rhizobia symbiotic N fixing potentially contribute to restoring fertility in mined land during rehabilitation efforts. Particularly, Acacia spp. stands out as an important legume of native vegetation, while their symbiotic relationship development and impacts on soil rehabilitation have not been fully understood. Methods In our glasshouse experiment, symbiosis relationship between three Acacia species (A. holosericea, A. ampliceps, and A. auriculiformis) and bacterial inoculum (Acacia nodule-associated bacteria (NAB), Bradyrhizobium diazoefficient CB1809, and Rhizobium leguminosarum bv viciae RLV248) and the effects of seedling ages on nodule formation were investigated. Additionally, the symbiotic nodule development and their the impacts on plant growth, plant N acquisition, and soil N availability were compared. Results The results revealed all three Acacia seedlings successfully formed nodules, with each displaying distinct morphology. Seedlings at 8 weeks demonstrated higher efficacy to form nodules than the those of 12 and 16 weeks old. A. auriculiformis is mostly effective to form nodules with all bacterial inoculums, especially with NAB. Rhizobium in A. auriculiformis nodules are dominated by Bradyrhizobium. Mesorhizobium is predominant in A. ampliceps nodules. Both Bradyrhizobium and Mesorhizobium are highly abundant in the nodules of A. holosericea. Symbiotic nodule development also induced plant growth promotion and N acquisition, with CB1809 the mostly effective. Notably, NAB inoculation could significantly enhanced soil N availability in addition to promoting plant growth. Conclusion These findings underscore the significance of Acacia-NAB symbiosis as a beneficial strategy to boost plant growth, increase soil N availability, and potentially aid in ecological rehabilitation endeavors.

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Section: N Enhancement Through Legume-rhizobia Symbiosis Developmentmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Acacia nodule-associated bacteria induced plant growth promotion and soil N availability

Yu¹,

You

Wu³

et al. 2023

Preprint

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“…Planting tree species at a suitable stand density is also vital for rehabilitating degraded and polluted soils (Lewis et al 2022). Planting density affects the recovery of vegetation in disturbed soils, the soil availability of nutrients for plant growth, and soil erosion (Schoenholtz et al 2000;Healey and Gara 2003;Lei et al 2019;Lewis et al 2022). In a recent pot experiment, high planting density increased the PHC removal rates of plants grown in contaminated soil (Lewis et al 2022).…”

Section: Ionsmentioning

confidence: 99%

“…Planting density affects the recovery of vegetation in disturbed soils, the soil availability of nutrients for plant growth, and soil erosion (Schoenholtz et al 2000;Healey and Gara 2003;Lei et al 2019;Lewis et al 2022). In a recent pot experiment, high planting density increased the PHC removal rates of plants grown in contaminated soil (Lewis et al 2022). However, the effects of different planting densities on plant growth and removal of pollutants in PHC-contaminated soils are still unclear.…”

Section: Ionsmentioning

confidence: 99%

Evaluation of survival, growth, and phytoremediation potential of Populus and Salix seedlings grown in polluted soils

Salam

2024

Diss. For.

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The aim of this thesis was to evaluate the survival, growth, and phytoremediation potential of Populus and Salix seedlings grown in polluted soils. More specifically, the following topics were studied: (1) the survival and growth of two European aspen clones and four hybrid aspen clones grown in control soil (pristine), old creosote soil polluted with hydrocarbons, and pristine soil spiked with fresh diesel oil at three different planting densities in a greenhouse over two growing seasons (Article I); (2) the survival, growth, and hydrocarbon removal of three European aspen clones and seven hybrid aspen clones grown in hydrocarbon-contaminated soil (including polycyclic aromatic hydrocarbons (PAHs) and total petroleum hydrocarbons (TPHs)) under field conditions over 4 years (Article II); and (3) the growth and metal accumulation ability of Salix psammophila seedlings with bamboo biochar (BBC) amendment at ratios of 0–7% in soils heavily contaminated by Cd and Zn in a pot experiment over 180 days (Article III). In study I (Article I), the survival rates of European aspen and hybrid aspen clone seedlings were 70–100% in control soil, 99% in the old creosote-contaminated soil, and 22–59% in the diesel-contaminated soil across all planting densities. The heights of aspen seedlings were 5–44% and 9–38% lower and the stem dry biomass was 9–93% and 34–63% lower in diesel-contaminated and creosote-contaminated soils, respectively, compared to the control. Low plant density increased survival rates and growth compared to higher density treatments. Of all the clones, hybrid aspen clones 14 and 291 and European aspen clone R3 showed reasonable survival and growth across all treatments. Soil treatment, planting density, and clone type significantly affected survival rate, height, and stem dry biomass (p < 0.05). In study II (Article II), the highest survival rates in old creosote-contaminated soils were in clone 291 (72%) among hybrid aspen clones and clone R3 (70%) among European aspen clones. Hybrid aspen clones 14 and 34 had 16–211% greater heights than other hybrid aspen clones. The height of European aspen clone R3 was also 25‒35% greater than that of other European aspen clones. However, clone type did not significantly affect seedling survival or height (p > 0.05). Among hybrid aspen clones, clone 134 had the largest hydrocarbon removal at a depth of 5–10 cm and clone 191 at a depth of 10–50 cm. Clone 14 also showed potential for removing hydrocarbons at both soil depths. In European aspen clones, clone R2 had the highest hydrocarbon removal at both soil depths. However, all clones showed an ability to remove total PAHs and TPHs from the soil (but p < 0.05 only at a soil depth of 5–10 cm). The reduction in hydrocarbon levels in the soil was more prominent at a soil depth of 5–10 cm than at a depth of 10–50 cm. Based on studies I and II, European aspen and hybrid aspen clones can be considered candidates for the remediation of soils polluted with PAHs and TPHs. In study III (Article III), BBC ratios of 1% and 5% resulted in only slight decreases in characteristics, especially height (0.6‒1.3%) but also total dry biomass (2‒10%), of S. psammophila seedlings compared to the control, whereas BBC 3% increased these measurements slightly (2% increase). BBC 7% reduced the height (16%) and total dry biomass (26%) of seedlings compared to the control. BBC amendment increased the accumulation of Cu, Cd, and Zn in different plant tissues, especially Cd and Zn accumulation (23‒30% and 13‒24%, respectively), in the BBC 3% treatment compared to the control. Based on these findings, S. psammophila with BBC amendment can be considered a candidate for phytoremediation. However, metal accumulation in the roots, stems, and leaves was not significantly affected by the BBC 1‒7% treatments (p > 0.05), except for Pb accumulation in the roots and Cu accumulation in the stem (p < 0.05). Overall, hybrid aspen, European aspen, and S. psammophila seedlings showed reasonable survival and growth, photosynthetic activity, efficient hydrocarbon removal from soil and metal accumulation ability both under greenhouse conditions and in a field experiment. Therefore, these species could be used to depollute areas affected by a range of hydrocarbons or Cd and Zn. However, future research should be conducted in the field to verify the abilities of hybrid and European aspens and S. psammophila to remediate soil contaminated by hydrocarbons, Cd, or Zn, and such studies should also use different planting densities and soil amendments over longer periods.

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“…These trees are currently found in many forests and savannah ecosystems, including tropical countries like Tanzania (Archibald et al, 2019;Heringer et al, 2019). Pine, eucalyptus and black wattle plantations are known to enhance soil fertility by adding organic matter and retaining soil moisture (Woś et al, 2022;Mengistu et al, 2022;Lewis and Hossain, 2022). The eucalyptus trees can grow well in nutrient-poor soils and improve soil fertility by taking up nutrients from deeper soil the layers and adding soil organic matter from litter decomposition as reported by Souza et al (2020).…”

Section: Introductionmentioning

confidence: 95%

Comparative Analysis of the Impacts of Commercial Exotic Forestry on Soil Fertility In the Southern Highlands of Tanzania: A Study of Pine, Eucalyptus and Black Wattle Plantations

Mligo,

Masao,

Yanda

2024

Ghana J. Geography

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Pine, eucalyptus and black wattle trees have been planted worldwide for commercial forestry and carbon sequester. These species affect soil fertility differently depending on climate and ecosystem. In the southern highlands of Tanzania, these trees replaced most of the native forests, grasslands and cropland, but their impacts on soil fertility are uncertain. The study compared Pinus patula, Eucalyptus grandis and Acacia meansii (black wattle) forest soils to surrounding natural forests, grasslands and cropland. 18 study sites were selected based on the related location and land use. Each site had two transects; each transect had three 25 m x 20 m rectangular plots for soil sampling. Soil pH, macro and micro-nutrients were measured to determine the soil fertility. The results show that pine, eucalyptus and wattle trees had significantly lower soil organic carbon than cropland and natural forests (p<0.05). The pine and wattle forests had lower pH than the surrounding cropland and natural forests (p<0.05). Farmlands and natural forests had significantly higher mean soil total nitrogen than the pine, eucalyptus and wattle forests (p<0.05). However, the wattle forests had a higher mean TN (1.16%) than the pine and eucalyptus forests (0.13%). Liming and application of phosphate-based fertilisers are recommended when farmers use the harvested exotic tree farms for food crop production.

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The planting density of Acacia mangium influences the rehabilitation of a waste rock dump in Papua New Guinea

Cited by 5 publications

References 40 publications

Acacia nodule-associated bacteria induced plant growth promotion and soil N availability

Acacia nodule-associated bacteria induced plant growth promotion and soil N availability

Evaluation of survival, growth, and phytoremediation potential of Populus and Salix seedlings grown in polluted soils

Comparative Analysis of the Impacts of Commercial Exotic Forestry on Soil Fertility In the Southern Highlands of Tanzania: A Study of Pine, Eucalyptus and Black Wattle Plantations

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