Rubber-Based Agroforestry Ecosystems Enhance Soil Enzyme Activity but Exacerbate Microbial Nutrient Limitations DOI Open Access

Wenxian Xu,

Yingying Zhang,

Ashar Tahir

et al.

Forests, Journal Year: 2024, Volume and Issue: 15(10), P. 1827 - 1827

Published: Oct. 19, 2024

Agroforestry ecosystems are an efficient strategy for enhancing soil nutrient conditions and sustainable agricultural development. Soil extracellular enzymes (EEAs) important drivers of biogeochemical processes. However, changes in EEAs chemometrics rubber-based agroforestry systems their mechanisms action still not fully understood. Distribution EEAs, enzymatic stoichiometry, microbial limitation characteristics rubber plantations under seven planting patterns (RM, monoculture system; AOM, Hevea brasiliensis-Alpinia oxyphylla Miq; PAR, brasiliensis-Pandanus amaryllifolius Roxb; AKH, katsumadai Hayata; CAA, brasiliensis-Coffea Arabica; CCA, brasiliensis-Cinnamomum cassia (L.) D. Don, TCA, brasiliensis-Theobroma Cacao) were analyzed to investigate the metabolic limitations microorganisms identify primary determinants that restrict limitation. Compared with systems, show increased carbon (C)-acquiring enzyme (EEAC), nitrogen (N)-acquiring (EEAN), phosphorus (P)-acquiring (EEAP) activities. The ecoenzymatic stoichiometry model demonstrated all plantation experienced C N system, exacerbated by reducing vector angle increasing length. P was detected any pattern. In progression from herbs shrubs trees through intercropping results a reduction constraints. This is primarily because accumulation litter root biomass tree-based which enhances content (e.g., organic carbon, total nitrogen, phosphorus, ammonium nitrogen) accessibility. Conversely, as depth increased, tended become more pronounced. Partial least squares path modelling (PLS-PM) indicated ratios most factors influencing (−0.46 0.40) (−0.30 −0.42). study presented novel evidence regarding constraints metabolism systems. Considering nutrients metabolism, arboreal species recommended over herbaceous better suit environment areas on Hainan Island.

Language: Английский

Area influences microbial resource limitations in karst fragmented habitats DOI

Cong Jiang,

Changchun Qiu,

Yuqing Wu

et al.

Applied Soil Ecology, Journal Year: 2025, Volume and Issue: 206, P. 105875 - 105875

Published: Jan. 10, 2025

Language: Английский

Citations

1
Optimal Level of Straw Addition After the Autumn Harvest for Black Soil Aggregate Stability DOI
Yu Li, Yu Fu,

Jinzhong Xu

et al.

Land Degradation and Development, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 10, 2025

ABSTRACT In Northeast China, straw residues are integrated into fields to improve the soil structure and fertility after autumn harvest. However, optimal amount of addition is unclear. To determine whether an increase in correlated with aggregate stability, study focused on black cropland was conducted through field incubation experiment (lasting 150 days) during seasonal freeze–thaw periods, implemented six different treatments: CK (0%), SA1 (1%, i.e., 10 g per kg soil), SA3 (3%), SA5 (5%), SA7 (7%), SA9 (9%). The results revealed that under conditions, stability significantly increased only when ≥ 5%. At this level, enhanced two ways. First, decomposition SOC content, which serves as a binding substance for aggregates promotes formation > 0.25 mm. Second, particles combined form straw‐soil composite macro‐aggregates exhibited high water stability. not positively amount. This because 5% sufficient reach carbon saturation, content showed no significant change further increasing addition. Moreover, excessive led nitrogen limitation slowed down rate but also wasted resources. Therefore, improving These findings provide theoretical basis how rational design return measures, thereby conditions spring sowing seedling emergence China.

Language: Английский

Citations

0
Response of Extracellular Enzyme Stoichiometric Properties and Microbial Metabolic Limitations to the Ecosystem Transition Mode Employed in Red Jujube Economic Forests on the Loess Plateau DOI Creative Commons

Chuntang Mu,

Jiaqi Li,

Fuchao Huang

et al.

Microorganisms, Journal Year: 2025, Volume and Issue: 13(4), P. 729 - 729

Published: March 24, 2025

Soil carbon (C), nitrogen (N), and phosphorus (P) cycling microbial metabolism limitations are key factors affecting nutrient vegetation development. Extracellular enzyme activity (EEA) plays a role in ecosystems, their activities can serve as indicators of requirements. At present, there is insufficient research on the microorganisms during ecosystem transition abandoned jujube forests Loess Plateau. Four modes were selected: forest replanted with Pinus tabulaeformis (CP), Platycladus orientalis (PO), medicinal materials (MM), alfalfa (AL). An (CK) was used control. physical chemical properties, biomass carbon, nitrogen, phosphorus, well changes β-1,4-glucosidase (BG), leucine aminopeptidase (LAP), N-acetylglucosamine (NAG), alkaline phosphatase (AP), studied. Analysis soil performed. Compared those CK treatment, C, N, P extracellular enzymes significantly increased (p < 0.05) treatments, C:NEEA, C:PEEA, N:PEEA ratios tended to decrease. Within decreased layer deepened, whereas stoichiometric ratio significant differences observed between layers. The vector model quantify revealed that surface limited mainly by C 10–20 cm 20–40 layers, N. Correlation analysis SOC, pH, MBC, MBN main activity. Mantel’s test (NAG + LAP), AP, C:PEEA important length angle. RAD properties had greater impact stoichiometry metabolic than physicochemical did. This study highlights importance determining processes enhances our understanding how ecological affect constraints Forest transformation have impacts limitation.

Language: Английский

Citations

0
Rubber-Based Agroforestry Ecosystems Enhance Soil Enzyme Activity but Exacerbate Microbial Nutrient Limitations DOI Open Access

Wenxian Xu,

Yingying Zhang,

Ashar Tahir

et al.

Forests, Journal Year: 2024, Volume and Issue: 15(10), P. 1827 - 1827

Published: Oct. 19, 2024

Agroforestry ecosystems are an efficient strategy for enhancing soil nutrient conditions and sustainable agricultural development. Soil extracellular enzymes (EEAs) important drivers of biogeochemical processes. However, changes in EEAs chemometrics rubber-based agroforestry systems their mechanisms action still not fully understood. Distribution EEAs, enzymatic stoichiometry, microbial limitation characteristics rubber plantations under seven planting patterns (RM, monoculture system; AOM, Hevea brasiliensis-Alpinia oxyphylla Miq; PAR, brasiliensis-Pandanus amaryllifolius Roxb; AKH, katsumadai Hayata; CAA, brasiliensis-Coffea Arabica; CCA, brasiliensis-Cinnamomum cassia (L.) D. Don, TCA, brasiliensis-Theobroma Cacao) were analyzed to investigate the metabolic limitations microorganisms identify primary determinants that restrict limitation. Compared with systems, show increased carbon (C)-acquiring enzyme (EEAC), nitrogen (N)-acquiring (EEAN), phosphorus (P)-acquiring (EEAP) activities. The ecoenzymatic stoichiometry model demonstrated all plantation experienced C N system, exacerbated by reducing vector angle increasing length. P was detected any pattern. In progression from herbs shrubs trees through intercropping results a reduction constraints. This is primarily because accumulation litter root biomass tree-based which enhances content (e.g., organic carbon, total nitrogen, phosphorus, ammonium nitrogen) accessibility. Conversely, as depth increased, tended become more pronounced. Partial least squares path modelling (PLS-PM) indicated ratios most factors influencing (−0.46 0.40) (−0.30 −0.42). study presented novel evidence regarding constraints metabolism systems. Considering nutrients metabolism, arboreal species recommended over herbaceous better suit environment areas on Hainan Island.

Language: Английский

Citations

2