Implementation of different forest management methods in a natural forest: Changes in soil microbial biomass and enzyme activities

Park, Wan; He, Ruirui; Wang, Peng; Cao, Anan

doi:10.1016/j.foreco.2022.120409

Cited by 10 publications

(3 citation statements)

References 79 publications

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“…Microorganisms in the soil can regulate nutrient cycling, stimulate phytohormones and improve plant immunity, thus promoting crop growth [75,76]. Soil microbial biomass is the driving force of soil nutrient transformation, cycling and preserving of the available plant nutrients in the soil [77]. The experiments proved that both the bacterial and fungal populations in rhizosphere soil were elevated with MIT dosage (Figure 7f).…”

Section: Improvement Of Soil Qualitymentioning

confidence: 90%

Effect of Modified Illite on Cd Immobilization and Fertility Enhancement of Acidic Soils

et al. 2023

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Cadmium pollution in the soil induces significant hazards to agricultural growth and public health. Therefore, new routes are needed to develop low-cost soil amendments that can effectively stabilize cadmium and improve soil fertility. This study introduces modified illite (MIT) with the enhanced ability to stabilize heavy metal Cd through the mixing of illite with calcium carbonate, silicate and sulfate in specific proportions by using the well-known calcination-hydrothermal process. The characterization findings revealed that the modified MIT is predominantly composed of gehlenite and akermanite, with greatly improved specific surface area, pore structure and cation exchange capacity. The main purpose of the present study is to unravel a plausible mechanism on how MIT can stabilize Cd(II) in the soil and to investigate the effect of MIT on the fertility of the contaminated soil. Experiments on soil remediation revealed that MIT has a more profound stabilizing impact on Cd(II) compared to natural illite, resulting in a 22.84% reduction in acid-soluble Cd of the soil when MIT was dosed at 0.5%. The potential mechanism of Cd(II) immobilization by MIT involves the ionic exchange of Cd2+ with the exchangeable Ca2+ and Mg2+. In addition, the hydrolysis products of gehlenite and akermanite are prone to form silicate precipitates with free Cd, leading to soil pH increment. The pot experiments showed that MIT significantly reduces the cadmium content of soil and improves the growth of water spinach organs. Meanwhile, enhancement of the indicators in rhizosphere soil further proved that MIT effectively increases the nutrient content, improves the soil structure and promotes microorganism growth.

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Section: Improvement Of Soil Qualitymentioning

confidence: 90%

Effect of Modified Illite on Cd Immobilization and Fertility Enhancement of Acidic Soils

et al. 2023

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“…In this context, the target tree management system (TMS) based on CTNM concepts is attracting increasing interest [7][8][9]. The TMS is an important management technique for producing large-size timber intended to provide more growing space for selected faster-growing and high-value trees (target trees) and improve the quality of individual trees by harvesting trees that are defective, unhealthy or in competition with target trees (disturbing tree) [10][11][12]. Moreover, the difference with traditional management is that the TMS abolished rotation age as an instrument for determining when a tree should be cut and adopting methods based on target diameter harvesting [6,9].…”

Section: Introductionmentioning

confidence: 99%

The Minimum Target Diameter and the Harvest Age of Oak Natural Secondary Forests in Different Sites Conditions: Case Study in Hunan Province, China

You,

Zhu

2024

Forests

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Maintaining permanent forest canopy cover and eventually harvesting timber by predetermined target diameter are often considered as a prototype for future management of the oak natural forest. However, target diameters and harvest age based on average forest growth rates from wide geographical areas often hamper improved management of oak forests. In this study, based on the sampling of 129 target trees from 51 oak natural secondary forest plots in Hunan Province, China, an individual-tree DBH (diameter at breast height) growth model of oak target trees was developed, and the site type (41 levels) was related to the model as random effects by a nonlinear mixed-effects approach. Moreover, the 41 site types were clustered into four site type groups (STG1, STG2, STG3, and STG4) by the K-means clustering algorithm to improve the model performance and practicality. With the help of the model, the five target diameters (including 24, 30, 40, 50, and 60 cm) were simulated in each of the four STGs, and the minimum target diameter was determined for each STG based on the theory of quantitative maturity. In the four STGs, the harvest age of the 24 cm diameter target ranged from 30 to 51 years; the harvest age of the 60 cm target diameter ranged from 131 to 220 years, with the oaks failing to reach 60 cm in the lowest-quality STG4; the minimum target diameter ranged from 21 cm to 29 cm. Results showed that lower-quality sites exclude higher target diameters from optimal harvesting strategies, in contrast to the higher target diameter as a more reasonable strategy in higher quality sites, and that the minimum target diameter is significantly influenced by site conditions. Therefore, it is necessary to develop a diverse target-diameter-harvesting strategy adapted for the complex site conditions of oak forests in Hunan Province towards site-specific timber management to improve the sustainability of timber production in oak forests.

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“…Soil enzymes are the primary biological driving force for organic matter decomposition and nutrient cycling [ 13 ], and their activities reflect the intensity and direction of various biochemical reactions [ 14 ]. Therefore, enzymatic activity is used as a sensitive indicator reflecting soil fertility and ecosystem function.…”

Section: Introductionmentioning

confidence: 99%

Warm Temperature Increments Strengthen the Crosstalk between Roots and Soil in the Rhizosphere of Soybean Seedlings

Zhao,

Wen,

Zhao

et al. 2023

Plants

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The plant rhizosphere underlies the crosstalk between plant and soil and has a crucial role in plant growth and development under various environments. We examined the effect of temperature rise on the rhizosphere environment of soybean roots to clarify the rhizosphere crosstalk between roots and soil in response to warm temperature rises in a global warming background. The in situ results of root enzyme activity revealed that soybean roots secrete β-glucosidase, and enzyme spectrum imaging demonstrated different enzymatic activities under different temperature environments. The soil enzyme kinetics results showed that soil enzymatic activity increased with increasing temperature, and soybean rhizosphere soil enzymatic activity was higher than that of non-rhizosphere soil. Rhizosphere soil and non-rhizosphere soil showed that the dominant bacterial phylum in soybean rhizosphere soil was Acidobacteria, and the dominant bacterial genus was JG30-KF-AS9. Compared with non-rhizosphere soil, rhizosphere soil was more nutrient-rich, and root secretions provided abundant carbon sources and other nutrients for soil microorganisms in the rhizosphere. Rhizosphere microorganisms affect plant growth by influencing the decomposition of soil organic carbon. The organic carbon content of rhizosphere soil was higher than that of non-rhizosphere soil under high temperatures.

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Implementation of different forest management methods in a natural forest: Changes in soil microbial biomass and enzyme activities

Cited by 10 publications

References 79 publications

Effect of Modified Illite on Cd Immobilization and Fertility Enhancement of Acidic Soils

Effect of Modified Illite on Cd Immobilization and Fertility Enhancement of Acidic Soils

The Minimum Target Diameter and the Harvest Age of Oak Natural Secondary Forests in Different Sites Conditions: Case Study in Hunan Province, China

Warm Temperature Increments Strengthen the Crosstalk between Roots and Soil in the Rhizosphere of Soybean Seedlings

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