Effects of partial substitution of chemical fertilizer with organic manure on the activity of enzyme and soil bacterial communities in the mountain red soil

Frontiers in Microbiology, Год журнала: 2023, Номер 14

Опубликована: Сен. 5, 2023

Introduction The partial substitution of chemical fertilizer with organic manure takes on a critical significance to enhancing soil quality and boosting sustainable agricultural development. However, rare research has studied the effects bacterial community diversity enzyme activity in maize field mountain red region Yunnan. Methods In this study, four treatments were set up which (the application rates N, P 2 O 5 K 240, 75 kg·ha −1 , respectively) was substituted by 10% (M10), 20% (M20), 30% (M30) 40% (M40) equal nitrogen, as well two control single (M0) no fertilization (CK). ( Zea mays L.) crop sown test May 2018. physicochemical properties, studied. Results activities Cellulase (CBH), Invertase (INV) β-glucosidase (BG) increased increase ratio. β-1,4-N-acetylglucosaminidase (NAG), Urease (URE), leucine aminopeptidase (LAP) also had same trend, but highest 159.92 mg·g ·h 66.82 143.90 at Compared CK M0 treatments, Shannon index notably 82.91%–116.74% 92.42%–128.01%, respectively, ratio ranging from 40%. Chao1 ACE significantly 30%. Proteobacteria dominant phylum all relative abundance decreased increased. Redundancy analysis showed that microbial biomass C main factor affecting composition under replacement treatment, while Actinobacteria activity. addition, yield M30 M40 higher than M0-M20 treatment highest, reaching 7652.89 . Conclusion Therefore, can improve biological characteristics, increasing thirty percent determined optimal for farmland area Yunnan, China.

Язык: Английский

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Effects of Land Reclamation on the Stability of Soil Organic Carbon Pool in Floodplains

Land Degradation and Development, Год журнала: 2025, Номер unknown

Опубликована: Апрель 1, 2025

ABSTRACT Land reclamation significantly alters floodplain structure and function, affecting soil organic carbon (SOC) dynamics, which are crucial for fertility sequestration. However, few studies have examined SOC variation following reclamation. This study investigated the effects of land on pool stability in along lower Yellow River, utilizing samples from four types (exposed beaches [EB], farmlands [FL], planted forests [PF], wetlands [WL]) across three seasons (spring, summer, autumn). Reclamation increased SOC, labile (LOC), non‐labile (NOC), management index (CMI) topsoil (0–20 cm) compared to EB ( p < 0.05). LOC, NOC, CMI were reduced deeper layers (below 20 cm), particularly FL PF. Seasonal variations LOC also affected by reclamation, especially FL. While did not alter over time, it enhanced pools seasonal fluctuations pool, Correlation analysis, random forest modeling, partial least squares structural equation modeling (PLS‐SEM) indicated that water content mediated impact while enzyme activity, nitrogen composition, determined changes. These results provide detailed information measures ecosystems.

Язык: Английский

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Characterization of soil properties and crop physiological changes in reclaimed mining areas with different reclamation years

Ecological Engineering, Год журнала: 2025, Номер 216, С. 107635 - 107635

Опубликована: Апрель 10, 2025

Язык: Английский

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Spatial evolution of soil properties in near-natural constructed wetland after 15 years of operation

Research Square (Research Square), Год журнала: 2024, Номер unknown

Опубликована: Июнь 5, 2024

Near-nature restoration is a key research focus in the field of ecological restoration. Near-natural constructed wetlands (NCWs) play an important role water resource purification. During long-term operation NCWs without intervention, their purification ability gradually weakens and soil structure function change. In present study, based on for 15 years, we measured physicochemical properties (e.g., carbon, nitrogen, phosphorus contents, pH) activities enzymes urease (URE), alkaline phosphatase (PHO), dehydrogenase, sucrase (SUC)) at depth 0–20 cm; levels these parameters different flow sections of, distances from, NCW were assessed. The results showed no significant difference between carbon total nitrogen from NCW. Further, NH₄⁺-N contents increased with increase distance wetland lowest center; further, NO₃^--N content was highest center (p < 0.01). surface (0–5 cm) higher than subsurface activity most decreased significantly depth; enzyme observed bank Redundancy analysis that had strong explanatory power activity. After operation, spatial changes. discovery this rule conducive to design will aid protection ecosystems subjected combined influence natural human activities.

Язык: Английский

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