Influence of Xanthan Gum-Based Soil Conditioners on the Geotechnical Properties of Soils

Applied Sciences, Год журнала: 2024, Номер 14(10), С. 4044 - 4044

Опубликована: Май 10, 2024

The impact of climate change has become increasingly severe in forests, where droughts and strong winds on the one hand extreme rainfall events other can damage forest ecosystems. To mitigate effects drought enhance soil water retention capacity, three types conditioners (SCs), labeled SC_R, SC_CG, SC_ZZC, were developed as part European project ONEforest. All are based Xanthan gum have different amounts fillers with diverse cellulose fiber lengths. These offer potential to optimize SC characteristics, e.g., absorption, retention, mechanical stability. This paper focuses influence SCs geotechnical properties soils from Ljubelj Alpine Slovenia (S1), Catalonia, northeastern Spain (S2), Heldburg, Germany (S3). results show an increase 53% 100% absorption treated soil. A less favorable was found drained shear strength compressibility. untreated a saturated state S1 c′ = 4.4 kPa, φ′ 33.5°; S2 1.4 30.0°; S3 12 28.0°. addition reduction mixtures. depends dosage added SC—whether it is low (L) or high (H) dosage. For instance, when conditioner demonstrated cohesion (c′) 11 kPa friction angle (φ′) 27.0°. However, increasing SC_R led decrease both for same (c′ 7.7 25.0°). Additionally, type also impacts strength. Among mixtures those containing SC_CG longest fibers stand out, demonstrating highest angle. Therefore, longer be promising component reduce negative XG soils.

Язык: Английский

---

Close-to-nature forest management effects on soil nematodes and microbial activity in pine plantations on aeolian sands

Community Ecology, Год журнала: 2024, Номер unknown

Опубликована: Апрель 29, 2024

Abstract Close-to-nature forest management combines the economic use of forests with nature conservation in forest, aiming promote stability, productivity, diversity and continuity within ecosystems. While close-to-nature is expected to positively impact tree growth, its effect on belowground micro-biota has been poorly investigated. Nematodes microbes are species-rich abundant soil microorganisms that have long used as ecological indicators health. In this study, was assessed nematode communities microbial activity pine plantations aeolian sands Southern Slovakia, 10 years after introduction approach. Fifteen stands managed fifteen applying standard were chosen. Our findings revealed significantly increased abundance nematodes biomass each plots. Moreover, mean omnivores predators stress sensitive (c–p4, c–p5). Additionally, reduces proportion tolerant (c–p1) enrichment opportunists (c–p2), all maturity structure indices well composite, structure, predator omnivore footprints. Furthermore, moisture, carbon content, carbon, basal respiration N-mineralization, understory vegetation diversity. These suggest practice, resulting different ages, influenced by changing quantity quality resources associated cover

Язык: Английский

---

Conversion of pure Chinese fir plantation to multi-layered mixed plantation increases organic phosphorus accumulation and transformation within soil aggregates

Applied Soil Ecology, Год журнала: 2024, Номер 201, С. 105518 - 105518

Опубликована: Июль 9, 2024

Evaluation of the impacts environmental factors and microbial communities on soil organic phosphorus (Po) availability is needed to clarify P cycling regulate plantations productivity. However, effects Po accumulation transformation converting pure Chinese fir plantation multi-layered mixed their regulatory mechanisms remain unclear. The aim this study was examine stand (Cunninghamia lanceolata; PP) with multiple tree species (C. lanceolata, Castanopsis hystrix, Michelia hedyosperma; MP) within topsoil (0–10 cm) aggregates in subtropical China. Our results showed that carbon (SOC), total nitrogen (TN), ammonium (NH4+-N), available (AP), as well carbon‑nitrogen ratio (C/Nsoil) carbon‑phosphorus (C/Psoil) were significantly higher (P < 0.05) all MP than those PP. quantities biomass C, N, (MBC, MBN, MBP) different greater phospholipid fatty acid contents related bacteria, fungi, arbuscular mycorrhizal fungi (AMF), actinomycetes aggregate classes relative activities tested hydrolytic enzymes, labile P, moderately resistant highly contents, most size MP. Finally, redundancy analysis (RDA) suggested fractions primarily affected by NH4+-N, litterfall (LF), litter (C/Nlitter), SOC fine root (FR). findings suggest into may represent an effective management strategy for promoting regulating properties degraded soils plantations.

Язык: Английский

---

Contaminants Removal and Monitoring: The Role of Hybrid MOFs in Agricultural Advancement and Soil Amendment

Advanced Sustainable Systems, Год журнала: 2024, Номер unknown

Опубликована: Дек. 26, 2024

Abstract The interest in improving soil quality through innovative methods continues to grow sustainable agriculture. Despite the emergence of new techniques, there has been limited research on based metal‐organic frameworks (MOFs). This review first addresses current issues and agriculture industry discusses recent approaches for quality. It then explores latest advancements MOF‐based methods, which hold potential enhance increase crop yields significantly. unique properties physicochemical mechanisms behind MOFs' applications analytical performance are presented, highlighting their more efficient cost‐effective enhancement solutions. reveals that these MOF show promise enhancing processes such as adsorption, extraction, analyte monitoring, fertilization, washing, moisture sensing. can lead a future with higher quality, ensuring better food production agricultural industry.

Язык: Английский

---

Dynamic Effects of Close-to-Nature Forest Management on the Growth Investment Strategies of Future Crop Trees

Forests, Год журнала: 2025, Номер 16(3), С. 523 - 523

Опубликована: Март 16, 2025

Close-to-nature forest management is a sustainable approach aimed at achieving balance between ecological and economic benefits. The cultivation of future crop trees in the later successional stages following removal competitive crucial for promoting positive development trajectories succession. Understanding dynamic process growth investment strategies facilitates rational planning cycles scopes, ultimately enhancing quality tree cultivation. This study was conducted Pinus massoniana secondary with close-to-nature Ningbo City, Zhejiang Province, using handheld mobile laser scanning technology to precisely reconstruct structure trees. Over period 2–5 years initial implementation management, 3D point cloud data were collected annually from both managed reference (non-managed) plots. Using these multi-temporal data, we analyzed dynamics strategies, structural components, crown competition A linear mixed-effect model applied compare temporal variations indices control Our results revealed that height-to-diameter ratio gradually declined over time, while crown-to-diameter initially increased then decreased These trends significantly different those observed Additionally, height rates plots consistently lower than plots, whereas diameter breast (DBH) higher. Furthermore, gap area their neighboring diminished, overlap progressively increased. suggest growth, driven by competition, shifted toward DBH management. In stage after trees, benefited ample radial space minimal competition. However, as became increasingly limited, enhance mechanical stability achieve balanced structure. processes underlying mechanisms contributes predicting community development, improving productivity, maintaining diversity, ensuring

Язык: Английский

---

Endemic threatened tree species in the Mediterranean forests of central Chile are highly sensitive to ENSO-driven water availability and drought

Forest Ecosystems, Год журнала: 2025, Номер unknown, С. 100324 - 100324

Опубликована: Март 1, 2025

Язык: Английский

---

The Effects of Stand Density on the Growth of Winter Rapeseed in an Agroforestry Intercropping System in the Red Soil Slopes of Southern China

Plants, Год журнала: 2025, Номер 14(9), С. 1374 - 1374

Опубликована: Май 1, 2025

Agroforestry systems can improve land use efficiency and increase the output of agricultural forestry products. In this study, a camphor forest-winter rapeseed composite system was used as research object from 2023 to 2024. A randomized block experiment set different slopes, S1, S2, S3 (5°, 10°, 15°), forest densities D1, D2, D3 (row spacing 1.5 m × m, 1.0 m) compare single crop (CK) winter analyze its growth status. This study showed that slope density significantly affected indicators rapeseed. Among intercropping treatments, S1D2 performed best. late period (flowering maturity), treatment increased leaf area index, relative chlorophyll content, root (length, surface area, volume), theoretical yield, actual it aboveground biomass per unit area. Although yield on slopes 2.52%, 2.82%, 1.72% lower than monocropping, respectively, ground exposed idle in after trees were cut down September. Intercropping with utilization coverage. The results m), S2D1 (10°, S3D1 (15°, treatments well terms accumulation they be recommended patterns for slopes.

Язык: Английский

---

Driving mechanisms of biomass mean annual increment in planted and natural forests in China

Forest Ecology and Management, Год журнала: 2024, Номер 569, С. 122191 - 122191

Опубликована: Авг. 2, 2024

Язык: Английский

---

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

Forests, Год журнала: 2024, Номер 15(1), С. 120 - 120

Опубликована: Янв. 8, 2024

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

Язык: Английский

---

Climate Change-Induced Growth Decline in Planted Forests of Quercus variabilis Blume near Beijing, China

Forests, Год журнала: 2024, Номер 15(7), С. 1086 - 1086

Опубликована: Июнь 22, 2024

A progressive decline in tree growth may be induced by global warming, affecting health and eventually resulting death, particularly for trees growing rocky mountainous regions where seasonal droughts have become more pronounced. However, dynamics areas experiencing pronounced climate change received little attention. In this study, a total of 100 (10 m × 10 m) grid plots were investigated planted forests Chinese cork oak (Quercus variabilis Blume), which established the 1960s 1970s area near Beijing, northern China. Furthermore, radial Q. (a 843 sampled from dominant [D], co-dominant [CD], suppressed [S] crown classes) was analyzed using retrospective dendrochronology generalized additive models. The effects meteorological changes between 1962 2020 on across three classes examined correlation analysis. results indicated that initially increased then decreased after 2010 at regional level, these trends varied according to class. D responded positively an increase temperature drought severity index (<0 dry >0 wet conditions) compared with CD S trees. continuously under higher temperatures during rainy seasons (June September); however, increases than contrast, declined. We confirmed historical rising health, are linked water availability. Our data suggested will considerably affected intensified droughts. This study furthers our knowledge regarding impact forest provides management strategies afforestation projects facing change.

Язык: Английский

---