[Effect of Biochar on Soil Enzyme Activity & the Bacterial Community and Its Mechanism].

Biochar-based fertilizers can improve the mineralization of carbon and nitrogen in soil and enhance the soil micro-ecological environment due to particular physical and chemical properties. It is of great significance to explore the underlying mechanism of biochar-based fertilizer in the regulation of soil microorganisms and soil enzyme activity to improve soil quality. Field experiments were conducted to investigate the effects of different biochar-based fertilizer rates[0 (CK2), 0.

Magnetic Resonance Imaging (MRI) Phenotypes May Provide Additional Information for Risk Stratification for Encapsulated Papillary Carcinoma of the Breast.

Background: Encapsulated papillary carcinoma (EPC) of the breast is a rare entity. EPC can be underappreciated on percutaneous biopsy, which may require additional procedures if invasion is not recognized preoperatively. We aimed to investigate the magnetic resonance imaging (MRI) phenotypes correlated with preoperative pathological risk stratification for clinical guidance.

[Effect of Long-Term Biochar Application on Soil Respiration in Flue-Cured Tobacco Planting Fields in Henan Province].

A five year (2013-2017) experiment was conducted to explore the effects of biochar application on the dynamic changes in soil respiration, soil water, and heat factors under four treatments:CK (without biochar), T1 (with 1.5 t·hmbiochar), T2 (with 15 t·hmbiochar), and T3 (with 45 t·hmbiochar). The results showed that:① the soil respiration rate in the growing season of flue-cured tobacco was significantly reduced by 25.

[Effect of Biochar Amendment on Physicochemical Properties and Fungal Community Structures of Cinnamon Soil].

To identify the effect of biochar addition on soil abiotic and biotic properties and provide evidence for the soil improvement with biochar input, the soil physiochemical properties and fungal community were investigated in a cinnamon soil after 3-year biochar additions of 10, 20, and 40 t ·hm. The relationship between the fungal community and edaphic physicochemical characteristics was also analyzed. The results showed that soil pH, moisture, total nitrogen (TN), and total organic carbon (TOC) significantly increased but dissolved organic carbon (DOC) content and soil bulk density decreased with biochar addition.

Influence of high-carbon basal fertiliser on the structure and composition of a soil microbial community under tobacco cultivation.

Soil microorganisms play a crucial role in cycling soil nutrients and providing organic nutrients for plant growth and development. Fertilisation balances soil fertility and quality, and affects soil microbial communities. Fertilisation is a frontier subject in agricultural and environmental sciences.

[Response of photosynthetic characteristics and accumulation and distribution of assimilation products in tobacco to different light environments].

In order to reveal the photosynthetic characteristics and the mechanism about accumulation and distribution of photosynthetic assimilation products under different light environments, potted tobacco was cultivated in a climate control chamber, there were three light intensity treatments (shading: (400±15)-(500±15) μmol·m·s; natural light: (800±15)-(1000±15) μmol·m·s; high light: (1500±15)-(1800±15) μmol·m·s). The results showed that with the decrease of light intensity, the biomass and root allocation, the net photosynthetic rate (P), stomata conductance (g) and transpiration rate (T) were decreased, but the intercellular CO concentration (C) increased. The maximum net photosynthetic rate (A), light saturation point (LSP), light saturation point (LCP) and dark respiration rate (R) reached the maximum level under high light condition while the apparent quantum efficiency was higher in low light environment.

[Effects of phosphorus fertilizer on the root system and its relationship with the aboveground part of flue-cured tobacco].

Using 'Yuyan 10' as the material, the effects of different phosphorus fertilizer application on root characteristics of tobacco, such as root dry mass and the difference of dry matter distribution and mineral nutrient accumulation between its above and underground parts were investigated. The results showed that the growth of flue-cured tobacco root system and the distribution of dry matter to the aboveground part were significantly promoted by phosphorus fertilizer application. The application of 30 kg P2O5 · hm(-2) led to the maximums of root dry mass, root volume, root activity and the minimum of root to shoot ratio.

Differentiation of central lung cancer from atelectasis: comparison of diffusion-weighted MRI with PET/CT.

Objective: Prospectively assess the performance of diffusion-weighted magnetic resonance imaging (DW-MRI) for differentiation of central lung cancer from atelectasis.

Materials And Methods: 38 consecutive lung cancer patients (26 males, 12 females; age range: 28-71 years; mean age: 49 years) who were referred for thoracic MR imaging examinations were enrolled. MR examinations were performed using a 1.

[Effects of light intensity on photosynthesis and dry matter production of flue-cured tobacco at its seedling stage].

Taking flue-cured tobacco Yunyan 87 as test material, this paper studied its photosynthesis and dry matter production at seedling stage under 100%, 88%, 72%, and 62% natural light intensities. At noon of sunny days, 100% natural light intensity inhibited the photosynthesis, while proper shading (88% natural light intensity) could eliminate the inhibition, and the daily photosynthesis was significantly higher than other treatments. Shading reduced the light saturation point and compensation point, enhanced the apparent quantum yield of photosynthesis and the net photosynthetic rate under weak light, increased the chlorophyll a and chlorophyll b contents, but decreased the chlorophyll a/b and cartenoids contents.

[Effects of light intensity on morphological and physiological characteristics of tobacco seedlings].

Through shading with white gauze to simulate different light habitats (100%, 68.2% 35.4% and 16.