Tree species identity and mixing ratio affected the release of several metallic elements from mixed litter in coniferous-broadleaf plantations in subtropical China

Bai, Youhuang; Zhou, Yunchao; An, Zhengfeng; Du, Jiaojiao; Zhang, Xunyuan; Chang, Scott X.

doi:10.1016/j.scitotenv.2022.156143

Cited by 14 publications

(3 citation statements)

References 55 publications

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“…As an important factor affecting soil fertility, soil microorganisms participate in the soil material and the energy cycle to support plant life. In turn, plant species, growth status, and growth period also affect the soil nutrient content, enzyme activity, and rhizosphere microorganisms [21,28]. We found that the pH of rhizosphere soil decreased significantly with growth time (Table 2), caused by the decomposition of organic matter due to rhizosphere microorganisms and the secretion of organic acids by roots [29].…”

Section: Responses Of Soil Nutrients and Enzyme Activities To Differe...mentioning

confidence: 86%

“…Currently, the research on rhizosphere microorganisms of industrial hemp mainly focuses on how the various tillage measures impact the soil microbial community and its diversity [19,20]. However, rhizosphere nutrients primarily come from soil supply, and rhizosphere microorganisms participate in the nutrient demand of crops in different growth periods, essentially a process of interaction of soil, microorganisms, and yield [21,22]. Therefore, understanding the interaction between soil nutrients and microbial communities in the rhizosphere of industrial hemp at various growth stages is conducive to large-scale cultivation.…”

Section: Introductionmentioning

confidence: 99%

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Changes in Rhizosphere Soil Nutrients, Enzyme Activities, and Microbial Communities at Different Stages of Industrial Hemp Development

Guo

Ma²,

Wang

et al. 2022

Agronomy

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Determining the nutrient requirements of industrial hemp to increase the yield requires quantifying variations in soil nutrients and enzyme activities in different growth stages, along with relevant soil microbial response. This study investigated the effects of different growth stages of industrial hemp on rhizosphere soil nutrients, enzyme activities, and microbial communities. The results showed that with the increase in the growth stages, the pH and available phosphorus (AP) decreased, while the soil organic matter (SOM), available nitrogen (AN), and available potassium (AK) increased substantially, indicating that the demand for nutrients of industrial hemp was constantly changing. Proteobacteria, Acidobacteria, Ascomycota, and Basidiomycota were found to be the keystone taxa to adapt to the nutrient requirements of industrial hemp at different growth stages by regulating soil enzyme activity. Furthermore, using the redundancy analysis and Spearman’s correlation analysis, we found that microbial taxonomic composition was related to the variations in AN, AP, and pH. In general, we emphasized that the interaction between industrial hemp and soil is closely related to the growth stage, which increases plant adaptability and growth because of the change of soil microorganisms.

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Section: Responses Of Soil Nutrients and Enzyme Activities To Differe...mentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Changes in Rhizosphere Soil Nutrients, Enzyme Activities, and Microbial Communities at Different Stages of Industrial Hemp Development

Guo

Ma²,

Wang

et al. 2022

Agronomy

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“…K is a highly mobile, readily leached ion, usually occurring in amounts in excess of decomposer demand (Dezzeo et al, 1998). The rapid rate of K loss shows the dominance of the leaching process (Bai et al, 2022). Magnesium is relatively leachable (Osono & Takeda, 2004;Lalremsang et al, 2022), its initial loss occurred rapidly, and at the end of the fourth week the original amount of Mg was reduced to 25% for HJ, 19.1% E2 and 13.8% for E3.…”

Section: Nutrient Release From Fresh Leaves (E2 E3) and Litter (Hj) D...mentioning

confidence: 99%

Nutrient Release from Immersed Foliar Biomass during Caruachi Dam Reservoir Filling: Caroni River, Venezuela

Narayan¹,

Rosales²

2023

GEP

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Background: Decomposition process controls the release and the availability of essential nutrients, which affects the structure and the functioning of plant communities. Freshwater reservoirs are largely known to have impacts on the water quality, especially during the first phases of filling. The aim of the study was to conduct a nutrient release experiment where decomposition of fresh leaves and litter from vegetation of a low dry tropical forest was flooded. Selected species were Leguminosae species Albizia glabripetala (H. S. Irwin) G. P. Lewis & P. E. Owen (AG), Bauhinia aculeata L. (BA), Centrolobium paraense Tul. (CP) and Piptadenia leucoxyllon Barneby & J. W. Grimes (PL).Freshwater decomposition experiments were carried out at 50 cm depth inside nine floating containers in a protected area of the reservoir: litter (HJ), leaves of AG and BA (E2), and CP and PL (E3) were used. It was over 20 weeks period. Every week for two months and at week 20, a bag of each sample was extracted for analysis of Carbon, Ca, Mg, Na, K, P and S. Results: Results indicate that residual dry mass decreased by 71% for HJ, 81.4% for E2, and more than 86.8% for E3 after twenty weeks. The higher content of carbon (%) at the beginning of the experiment was E2 > E3 > HJ. After 20 weeks, the percentage of carbon loss was 2.09% for HJ, 3.02% for E2, and 1.69% for E3. S decreased between 50% -60% during the first week; at 20 weeks, the remaining amount of S was 13% for HJ and E3 and 7% for E2. P showed a different pattern, where the second week was more important for the release. HJ and E3 followed the pattern of nutrient release: K > Mg > Na > Ca while E2 was K > Ca > Mg > Na. Conclusions: P and S release depends on the time of submergence and the species. Fresh leaves decay faster than necromass. Nutrient loss is higher than 50% for the three first weeks and seems constant between week 8 -20. C and S concentrations incorporated in the reservoir can result in a high release of gases CH 4 and S 2 to the atmosphere.

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Accumulation of sodium and manganese during litter decomposition of Qinghai spruce (Picea crassifolia) forest in China

Zhao,

Zang,

Huang

et al. 2024

Ecosphere

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Litter decomposition is a key ecological process as a control on nutrient cycling in forest ecosystems. Forest litter is an important carrier of element cycles in forest ecosystems. The biogeochemical cycle of elements is of great significance to plant communities and ecosystem functions. At present, most of the studies on the litter major elements have focused only on C, N, and P, and there are few studies on the biogeochemical cycle of sodium (Na) and manganese (Mn) of forest litter. In this study, we investigated the concentrations and fluxes of Na and Mn in needle litter of Qinghai spruce over a 12‐month period. We measured the release and accumulation dynamics of litter Na and Mn during litter decomposition at different canopy coverage and elevations over 3.9 years. The results show that the annual Na and Mn concentrations were 312.34 and 621.19 mg kg−1, and the annual fluxes of Na and Mn were 236.67 and 343.16 g ha−1 in needle litter, respectively. After 3.9 years of litter decomposition, Na released 15.6% and Mn accumulated 93.4% compared to the initial concentration. The concentration of Na and Mn in needle litter both accumulated fastest at low canopy coverage. The concentrations of Na and Mn were different at various elevations, but there was no obvious regularity. These results illustrate the seasonal characteristics of litter element return and nutrient cycling during litter decomposition in typical coniferous forests in the Qilian Mountains and could provide basic data and theoretical basis for ecological protection in the Qilian Mountains.

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Tree species identity and mixing ratio affected the release of several metallic elements from mixed litter in coniferous-broadleaf plantations in subtropical China

Cited by 14 publications

References 55 publications

Changes in Rhizosphere Soil Nutrients, Enzyme Activities, and Microbial Communities at Different Stages of Industrial Hemp Development

Changes in Rhizosphere Soil Nutrients, Enzyme Activities, and Microbial Communities at Different Stages of Industrial Hemp Development

Nutrient Release from Immersed Foliar Biomass during Caruachi Dam Reservoir Filling: Caroni River, Venezuela

Accumulation of sodium and manganese during litter decomposition of Qinghai spruce (Picea crassifolia) forest in China

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