Soil organic carbon storage in forest restoration models and environmental conditions

Abstract

restoration models, other land uses (cropland, bare land, grassland, and natural forest), climate regimes, and soil properties. The SOC storage in the forest restoration models and other land uses at a global scale ranged between 0.1 to 514 Mg ha −1 . The overall mean value for SOC storage was higher for natural regeneration (112 Mg ha −1 ), followed by agroforestry (74 Mg ha −1 ), mixed forest (73 Mg ha −1 ), and monocultures (68 Mg ha −1 ). However, the average SOC storage was similar among the four restoration models in the moist warm climate zone. The SOC storage mean value in the moist cool zone was 23% higher than the dry cool zone (81 and 62 Mg ha −1 , respectively), and 50% higher for the moist warm zone when compared to the dry warm climatic zone (74 and 38 Mg ha −1 , respectively). The SOC storage of the restoration models was positively related to soil depth (0.59; p < 0.01), clay content (0.29; p < 0.01), and stand age (0.17; p < 0.01). Globally, the mean values of SOC storage were 26, 66, and 139 Mg ha −1 at zero − 10, zero − 30, and zero − 100 cm depths, respectively. In addition, sandy soils showed smaller mean values of SOC storage than medium to clay soils, especially in deeper soil layers. Furthermore, SOC storage was positively related between restoration models and other land uses (0.93; p < 0.01), suggesting a prominent effect of climate and soil properties on SOC. Forest restoration models showed larger SOC storage when compared to croplands and bare land, but in general it was smaller or similar when compared to pasture and natural forest.

Tree species composition affects litter eco‐hydrological function in Pinus massoniana conifer‐broadleaf mixed forest stands in southwest China

“…However, P. massoniana plantations have evident problems, such as unstable stand structure, low productivity and biodiversity, disease and insect damage, and poor ecological functions (Meng et al, 2018). Compared with pure plantations, mixed forests show obvious ecological advantages in terms of the stability of forest ecosystem services (Bai et al, 2021), such as water conservation (Chen et al, 2022), carbon sequestration (Ranieri et al, 2022; Wang et al, 2022), and biodiversity maintenance (Xie et al, 2018). In recent years, P. massoniana forests have been transformed into P. massoniana conifer‐broadleaf mixed forests by replanting broadleaf tree species, thinning, or implementing nature‐based management methods, P. massoniana conifer‐broadleaf mixed forests have become an important forest management trend in this region (Meng et al, 2018).…”

Estimation of Soil Organic Carbon Content in Coastal Wetlands with Measured VIS-NIR Spectroscopy Using Optimized Support Vector Machines and Random Forests

“…Soil texture can be divided by soil structure and soil particle diameter, which is the main driver of SOC content [15] and predictors [16]. SOC content is affected by soil texture, with the average SOC content of sandy soil being lower than that of medium to clay soil, and clay content was found to be positively correlated with the increase in SOC content [17]. The soil texture of coastal wetlands is diversified, and due to the differences in the organic carbon content of underground soil in different soil textures, it is more accurate to refine the soil texture and estimate the CW-SOC.…”

Causes of Changing Woodland Landscape Patterns in Southern China

“…As the carrier of forest resources, forest land is not only the basis for sustainable forestry development but also a prerequisite for the maintenance of the ecological services of forests [3][4][5]. Different forest landscape systems are observed under various forest ecological types, and geographical, climatic, and socio-economic conditions, leading to distinct and diverse forest landscape mosaics [6][7][8].…”