Plant preference for NH4+ versus NO3− at different growth stages in an alpine agroecosystem

The use of silicon in agriculture has attracted a great deal of interest in research, due to silicon's numerous benefits to plants, despite the element not being classified as an essential element for general vascular plants. The use of silicon is well known as one of the most promising methods for sustainable, environmentally friendly, and broad spectrum control of various diseases and for improving the growth and yield in plants. Most research on the benefits of silicon focuses on field crops, and silicon's role in the nutrition of horticultural crops, especially in fruits, has not been relatively well investigated. The current chapter underlines the agricultural importance of silicon in improving the yield and quality of fruit crops and in augmenting the crops’ resistance against diseases explored until now. The data presented in this chapter can help provide a better understanding of how silicon treatments may improve the quality and yield of fruit crops, increase the resistance, and reduce the severity of plant diseases. Additionally, this chapter highlights future research areas in the use of silicon in agriculture.

Importance of silicon in fruit nutrition: Agronomic and physiological implications

This work aims to prepare nanosilver coated carbon black via benzoxazine oxidation as a filler for polylactic acid (PLA) to produce novel hybrid materials with improved electrical and antimicrobial properties. Nanosilver coated carbon black exhibited antimicrobial activity against S.aureus, B.subtilis, M.luteus, E.coli, P.aeruginosa and C.albicans. It was found that the nanosilver coated carbon black (10CB-Ag) was the most effective filler since it showed largest inhibition zones. Thermogravimetric analysis (TGA) showed that the silver content in 10CB-Ag was 5.68% by weight. The hybrid materials of PLA with uncoated carbon black and nanosilver coated carbon black fillers were prepared by injection molding. The optimal composition of the prepared hybrid materials was found to be 15 phr of nanosilver coated carbon black in PLA (15AgCB-PLA). This material showed quite good properties, e.g. tensile strength of 50 MPa, % elongation at break of 1.68 and electrical conductivity of 2.78 × 10−9 S⋅m−1. Moreover, it exhibited the S. aureus inhibition of about 99%. This work revealed the possibility of using this material for anti-electrostatic and antimicrobial applications.

Development of novel hybrid materials from polylactic acid and nano-silver coated carbon black with distinct antimicrobial and electrical properties

Little is known about the response of pomegranate to the foliar application with nutrients and gibberellic acid. A randomized complete block design (RCBD) experiment was conducted on 40-years old Manfalouty pomegranate trees grown on Upper Egypt. The study aims to investigate the effect of foliar application with gibberellic acid (GA3), potassium silicate (PS), zinc sulphate (ZS) and fetrilon compi (FC) which is a mixture of micronutrients on fruiting of pomegranate trees.

https://ajas.journals.ekb.eg/article_18688_df3006549a2d74ea239a65d15aeb408b.pdf

Effect of some Micro-nutrients, Silicon and GA3 Spraying on Yield and Fruit Quality of Pomegranate

/pdf/nitrogen-fertilization-strategies-for-the-hass-avocado-that-2264xl8gra.pdf

Nitrogen Fertilization Strategies for the ‘Hass’ Avocado that Increase Total Yield Without Reducing Fruit Size

Role of Nitrogen and Nutrients in Crop Nutrition

Nanocomposites with antimicrobial activity are of great interest nowadays and the development of titanium dioxide with these functional properties presents interest in academic and industrial sectors. An approach to develop PE nanocomposite containing Ag nanoparticles to have an antimicrobial effect is presented. To obtain such antimicrobial nanocomposites, LDPE/EVA were processed with Ag nanoparticles on TiO2 particles as inorganic carrier substance. Titanium dioxide nanoparticles (P-25) were covered with silver nanoparticles using Turkevich Method or citrate reduction method. The Ag/TiO2 nanoparticles were dispersed at concentration of 0.5 wt%, 0.8 wt% and 1 wt% in LDPE/ethylene vinyl acetate copolymer (EVA)-(50% w/w) at the melt state in a Haake torque Rheometer. Silver nanoparticles were characterized with UV-Vis Spectroscopy. The nanocomposites thus prepared were characterized through Ares Rheometer, Scanning Electronic Microscopy (SEM) and JIS Z 2801 antimicrobial tests to study the effects of the addition of nanoparticles on rheological properties, morphological behavior and antimicrobial properties. The results showed that incorporation of silver/titanium dioxide nanoparticles on nanocomposites obtained systems with different dispersions. The Ag/TiO2 particles showed uniform distribution of Ag on TiO2 particles as observed by SEM-EDX and antimicrobial tests according to JIS Z 2801 shows excellent antimicrobial properties.

Novel LDPE/EVA Nanocomposites with Silver/Titanium Dioxide Particles for Biomedical Applications

Morelos is the fourth in area cultivated and production volume of avocado. Of the 13 municipalities where it is farmed, Ocuituco represents 43.51% and Tetela del Volcan 27.53%. Despite being one of the main fruit species in Morelos, no information related to the fertility of the soil where it is grown, the quality of water available for irrigation and nutritional status of this important fruit for the state. The study was conducted in the municipality of Ocuituco which identified three agro-habitats taking into account climate, landform, soil type and altitude. In each agro-habitat were carried out soil sampling to determine the physical and chemical characteristics based on the Mexican Official Standard NOM-021-SEMARNAT-2000, the chemical quality of water for irrigation as described by Richards (1954) and crop nutrient status of avocado "Hass" according to the methodology described by Maldonado (2002). The soils had different physical and chemical characteristics, as well as the nutritional status of avocado trees in the three agro-habitats. The trees had excessive concentration of Cl, Cu and Zn. Indices of optimal percentage deviation expressed different nutritional requirements. The water used for irrigation was of low salinity and sodium content, so it can be used without restrictions.

Avocado Nutritional Diagnosis （Persea americana Mill.） ＂Hass＂, Soil Fertility and Water Quality in Ocuituco, Morelos

Nitrogen/Ammonium Concentration Response of Vegetable and Flower Crops

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Role of Nitrogen and Nutrients in Crop Nutrition

Novel LDPE/EVA Nanocomposites with Silver/Titanium Dioxide Particles for Biomedical Applications

Avocado Nutritional Diagnosis （Persea americana Mill.）＂Hass＂, Soil Fertility and Water Quality in Ocuituco, Morelos

Nitrogen/Ammonium Concentration Response of Vegetable and Flower Crops

Gabriel

Author Tools

Chat about Author

Papers

Role of Nitrogen and Nutrients in Crop Nutrition

Novel LDPE/EVA Nanocomposites with Silver/Titanium Dioxide Particles for Biomedical Applications

Avocado Nutritional Diagnosis （Persea americana Mill.） ＂Hass＂, Soil Fertility and Water Quality in Ocuituco, Morelos

Nitrogen/Ammonium Concentration Response of Vegetable and Flower Crops

Avocado Nutritional Diagnosis （Persea americana Mill.）＂Hass＂, Soil Fertility and Water Quality in Ocuituco, Morelos