Rapid detection of chemical oxygen demand, pH value, total nitrogen, total phosphorus, and ammonia nitrogen in biogas slurry by near infrared spectroscopy

Qiu, J. H.; Guo, Hang; Xue, Yuan; Liu, Qingyu; Xu, Zhiyu; He, Li

doi:10.1039/d3ay00436h

Cited by 5 publications

(3 citation statements)

References 32 publications

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“…Soil organic carbon (SOC) was quantified by the potassium dichromate oxidation method with external heating (Nóbrega et al, 2015 ). Total nitrogen (TN) and total phosphorus (TP) were determined using a Kjeldahl apparatus (Qiu et al, 2023 ). Total potassium (TK) was measured using the sodium hydroxide fusion followed by flame photometric spectrometry.…”

Section: Methodsmentioning

confidence: 99%

Mixing with native broadleaf trees modified soil microbial communities of Cunninghamia lanceolata monocultures in South China

Zheng,

Gu,

et al. 2024

Front. Microbiol.

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Mixing with different broadleaf trees into the monocultures of Cunninghamia lanceolata is widely adopted as an efficient transformation of the pure C. lanceolata forest. However, it is unclear how native broad-leaved trees influence the belowground ecological environment of the pure C. lanceolata culture plantation in nutrient-poor soil of South China. Herein, we aimed to investigate how a long-time mixing with native broadleaf trees shape soil microbial community of the pure C. lanceolata forest across different soil depth (0–20 cm and 20–40 cm) and to clarify relationships between the modified soil microbial community and those affected soil chemical properties. Using high-throughput sequencing technology, microbial compositions from the mixed C. lanceolata-broadleaf forest and the pure C. lanceolata forest were analyzed. Network analysis was utilized to investigate correlations among microorganisms, and network robustness was assessed by calculating network natural connectivity. Results demonstrated that the content of soil microbial biomass carbon and nitrogen, total phosphorus and pH in mixed forest stand were significantly higher than those in pure forest stand, except for available phosphorus in topsoil (0–20 cm). Simultaneously, the mixed C. lanceolata-broadleaf forest has a more homogeneous bacterial and fungal communities across different soil depth compared with the pure C. lanceolata forest, wherein the mixed forest recruited more diverse bacterial community in subsoil (20–40 cm) and reduced the diversity of fungal community in topsoil. Meanwhile, the mixed forest showed higher bacterial community stability while the pure forest showed higher fungal community stability. Moreover, bacterial communities showed significant correlations with various soil chemical indicators, whereas fungal communities exhibited correlations with only TP and pH. Therefore, the mixed C. lanceolata-broadleaf forest rely on their recruiting bacterial community to enhance and maintain the higher nutrient status of soil while the pure C. lanceolata forest rely on some specific fungi to satisfy their phosphorus requirement for survive strategy.

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Section: Methodsmentioning

confidence: 99%

Mixing with native broadleaf trees modified soil microbial communities of Cunninghamia lanceolata monocultures in South China

Zheng,

Gu,

et al. 2024

Front. Microbiol.

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“…The experiments were conducted from March to July in 2022 and 2023, respectively, and planting was carried out in a greenhouse. The tested soil is humus soil, with the following physical and chemical properties in the 0-30 cm profile: total nitrogen 1.41 g/kg [31], total phosphorus 0.34 g/kg [32], total potassium 8.9 g/kg [33], and organic matter 40.6 g/kg [34].…”

Section: Plant Materials and Growth Conditionsmentioning

confidence: 99%

“…(1) Determination of growth indicators included [root-to-shoot ratio] = underground dry weight/aboveground dry weight; [strong seedling index] = (stem diameter/plant height + underground dry weight/aboveground dry weight) × whole plant dry weight; chlorophyll content was determined by the mixed extraction method using acetone and ethanol; root activity was measured using the TTC (triphenyltetrazolium chloride, TTC) method [31]; and photosynthetic parameters, including net photosynthetic rate, transpiration rate, stomatal conductance, and intercellular CO 2 concentration, were measured using a portable photosynthetic instrument Li6400. The measured position was the third leaf below the growth node [36].…”

Section: Measurement Of Various Indicators For Potato Sproutingmentioning

confidence: 99%

Study on Potato Bud Cultivation Techniques in a Greenhouse in Spring

Wang,

Bao,

Zhang

et al. 2023

Plants

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The species degeneration caused by traditional potato cultivation methods is becoming increasingly evident, and it is particularly important to study new potato cultivation methods. Sprout planting technology has the advantages of large reproductive capacity, fast growth speed, and simplified maintenance of cultivated crops. In this study, four disease-free potato varieties (‘Fujin’, ‘Youjin’, ‘Zhongshu 4’, and ‘Feiwuruita’) were treated with different parts (top bud, middle bud, and tail bud) and different bud lengths (10 cm, 15 cm, and 20 cm), and then potato sprout planting was carried out. A nutrient pot experiment was performed following a randomized complete block design (RCBD) with various replicates and a natural control (CK) treatment. By comprehensively measuring the emergence, chlorophyll content, net photosynthetic rate, dry matter distribution during the bulking period of blocks, and effect of growth and quality with bud direct seeding under both treatments, it was found that potato block top bud direct seeding cultivation is significantly superior to other parts. In terms of early maturity and yield statistics, the advantage of top bud cultivation in ‘zhongshu 4’ is most obvious; it reaches maturity an average of 14 days earlier, and the yield can be increased by 38.05%. Therefore, top bud direct seeding is more suitable for potato sprout planting technology. On this basis, the 20 cm and 15 cm bud length treatments of top buds were used for direct cultivation, and all the above indicators performed well. Among them, in the zhongshu 4 variety, the yields of 15 cm and 20 cm bud length treatments increased by 41.78% and 38.05%, the growth rates of commercial potatoes increased by 6% and 6.9%, respectively, and the effects were the most obvious. In conclusion, the deep research and application of potato sprouting technology has high utilization value for improving potato yield and quality and has guiding significance for greenhouse potato cultivation in early spring.

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Fast detection of ammonia nitrogen concentration in biogas fluid using near-infrared spectroscopy combined with wavelength selection by coronavirus herd immunity optimizer

Wang,

Liu

2024

Microchemical Journal

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Rapid detection of chemical oxygen demand, pH value, total nitrogen, total phosphorus, and ammonia nitrogen in biogas slurry by near infrared spectroscopy

Abstract: Effective treatment of sewage requires accurate measurement of important water quality parameters, such as chemical oxygen demand (COD), pH value, total nitrogen (TN), total phosphorus (TP), and ammonia nitrogen (NH3-N)....

Cited by 5 publications

References 32 publications

Mixing with native broadleaf trees modified soil microbial communities of Cunninghamia lanceolata monocultures in South China

Mixing with native broadleaf trees modified soil microbial communities of Cunninghamia lanceolata monocultures in South China

Study on Potato Bud Cultivation Techniques in a Greenhouse in Spring

Fast detection of ammonia nitrogen concentration in biogas fluid using near-infrared spectroscopy combined with wavelength selection by coronavirus herd immunity optimizer

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