Abstract Purpose The health of rhizosphere soil microorganisms is an important indicator to evaluate quality. Therefore, understanding the response tobacco crop succession crucial for promoting sustainable development agriculture. Methods microbial diversity and community structure in continuous cropping non-cropped 7 years were analyzed by Illumina platform. Result (1) Continuous cause acidification reduction alkaline nitrogen (AN) organic matter (SOM). (2) reduces communities, increasing...

Understanding the response of microbial communities and their potential functions is essential for sustainability agroecosystems under long-term continuous cropping. However, limited research has focused on investigating interaction between soil physicochemical factors community dynamics in This study probed into properties, metabolites, diversity tobacco rhizosphere soils cropped continuously 0, 5, 20 years. The relative abundance bacterial genera associated with nutrient cycling (e.g.,...

Understanding how soil properties and microbial communities respond to crop rotation is essential for the sustainability of agroecosystems. However, there has been limited research on alters below-ground in soils with serious bacterial wilt within karst agricultural system. This study investigated effects continuous planting corn, tobacco, tobacco-corn regions Southwestern China. High-throughput sequencing was used evaluate responses community structure monoculture patterns. As expected,...

As is well known, continuous cropping can lead to a decrease in crop yield and quality. Despite this, remains prevalent practical agricultural production, particularly the case of tobacco cultivation, owing its high economic value. The samples for this study were collected from flue-cured planting base located Huili County, Liangshan Yi Autonomous Prefecture, Sichuan Province, China. After years planting, has significantly decreased. In order explain microecological causes phenomenon, we...

The maturity affects the yield, quality, and economic value of tobacco leaves. Leaf level discrimination is an important step in manual harvesting. However, judgment fresh leaves by grower visual evaluation subjective, which may lead to quality loss low prices. Therefore, objective reliable discriminant technique for leaf based on near-infrared (NIR) spectroscopy combined with a deep learning approach convolutional neural networks (CNNs) proposed this study. To assess performance model, four...

Abstract Straw incorporation is an important measure to improve soil fertility and acidification. However, fresh straw that returned the field cannot be decomposed in a short time. Accumulation of undecomposed changes humus composition C structure. An experiment was designed evaluate effects on microbial communities. Soil samples were collected from rice–rice–tobacco region southwestern China (The rice Hongyou No 7, which new variety applied 2007 by Honghe State Agricultural Science...

A Gram-stain-positive, motile, rod-shaped bacterial strain, YN-1T, was isolated from a rice field in the town of Jietou, Yunnan Province, PR China. Colonies were circular, 1-2 mm diameter, creamy white, with slightly irregular margins. The isolate grew optimally at 37 °C, pH 7.0 and 1.0 % (w/v) NaCl. On basis results 16S rRNA gene sequence similarity comparisons, YN-1T clustered together other species genus Bacillus showed highest similarities onubensis 0911MAR22V3T (98.0 %), humi LMG22167T...

In this research, the spared nerve injury (SNI) model was established in male SD rats to evaluate analgesic effect of a new soluble epoxide hydrolase (sEH) inhibitor FE4708.Then we explored its anti-inflammatory mechanism.The paw withdraw threshold (PWT) and used FE4708 SNI rats.ELISA detect level epoxyeicosatrienoic acid (EETs) spinal cord.Western blot on expression HIF-1α NF-κB protein rat cord.The results showed that administration group have significant effect.The medium high dose groups...

Abstract Compound biofertilizers could improve the nutrient condition of ecosystem and fertility agricultural fields. At micro level, soil microbial communities be influenced, resulting in taxonomic functional changes microbiome. In present research, compound were applied into tobacco ( Nocotiana tabacum L., Family: Solanaceae) field ecosystems Qianxi, Weining, Meitan city China, diversity determined using metagenome technique. The results revealed that nitrogen compounds each treatment...

Flavonoids are considered a benign alternative to traditional pesticides. Their antioxidant mechanism and environmental risks deserve extensive attention. In this work, the transformation mechanisms, kinetic properties, ecotoxicity of flavonoids (kaempferol quercetin) mediated by reactive oxygen species (1O2, ∙OH, ∙OCH3, ∙OOH) in gaseous aqueous environments were investigated using cell experiments quantum chemical calculations. Three radical scavenging including hydrogen atom transfer...

This study explored the changes in carbon components of tobacco-planting soil by application rice straw as organic materials to replace chemical fertilizers partially. Flue-cured tobacco was applied base fertilizer investigate mineralization during its growing period. At 0 d, humic acid (HA-C), humin (HM-C), HU ratio, PQ value and HM-C/(HA-C + FA-C) are 31.67, 31.40, 60.05, 28.01 27.75%, respectively which is higher than those alone. 30 humus (HE-C), HA-C, fulvic (FA-C) were 29.41, 20.97...

This paper deal with the analysis of relationship between acidity and alkalinity organic carbon structure humus components tobacco-growing soils in Tengchong city. Under same level matter nutrient content, different pH values city were selected for investigation. Results showed that HA/FA soil low content gradually decreased increasing pH, indicating a higher active lower stable soils. In high value highly significant negative correlation PQ values. With acidity, became higher, stability...

Abstract Purpose Soil microbial communities are critically important to agricultural ecosystems. The present study aimed evaluate the changes in soil community composition and functional groups after planting Phallus rubrovolvatus . Methods Illumina platform were adopted characterize bacterial fungal diversity cropped with P. for 0 1 year. Results results showed that reduced soil, dynamics of changed more drastically. This also indicated that, as keystone taxa, dominant bacteria (...

Abstract In recent years, along with the rapid development of construction industry, gradually exposed shortcomings existing in project management process, block chain technology as a new technology, has decentralized, transparency and traceability, if can introduced engineering management, some problems will be improved, such information back difficulties, poor supervision. Based on this point view, paper discusses application management.

Abstract In this article, through further study of water conservancy engineering heritage, compiled a set system heritage research evaluation methods, namely analytic hierarchy process (AHP) method combined with the Delphi evaluation, research, hope that quantifiable data model and offer reference for heritage. Thus, protection, effective management rational utilization can be better promoted.

River resistance characteristics, which can be reflected by the factor, have an impact on flow and sediment transport. In classical theory, Prandtl proposed mixing length model for simulation of turbulence, von Kármán established logarithmic formula velocity distribution. Based that, expression factor derived. With development numerical technology, k−ε has been widely applied in channels computation. However, different closure ways Reynolds stress turbulence equations, outcomes are not...

The application and accumulation of phosphogypsum (PG) may cause soil pollution, so it is significance to establish a rapid method for its determination in soil. In this study, the feasibility quantifying PG by multivariate calibration combined with portable near-infrared spectroscopy (NIR) infrared (IR) was investigated. order obtain better accuracy, standard normal variable (SNV) Savitzky-Golay smoothing were employed as pretreatment methods IR NIR, respectively. competitive adaptive...

Abstract Understanding the response of microbial communities and their potential functions is essential for long-term continuous-cropping agroecosystems. However, there are few studies on interaction between soil physicochemical factors community dynamics in agroecosystems under conditions. We investigated properties, metabolites, diversity rhizosphere soils which tobacco was cropped continuously 0, 5, 20 years. The results showed that bacterial significantly increased then decreased with...

Abstract Purpose Understanding the response of microbial communities and their potential functions is essential for long-term continuous-cropping karst agroecosystems. However, there are few studies on interaction between soil physicochemical factors community dynamics in agroecosystems under conditions. Methods We investigated properties, metabolites, diversity rhizosphere soils which tobacco was cropped continuously 0, 5, 20 years. Results Compared with CK, bacterial significantly...