Effect of Organic Wastes and Method of Composting on Compost Maturity, Nutrient Composition of Compost and Yields of Two Vegetable Crops

2003 ◽  
Vol 22 (4) ◽  
pp. 95-109 ◽  
Author(s):  
J. A. Adediran ◽  
L. B. Taiwo ◽  
R. A. Sobulo
Keyword(s):  
Organic Wastes ◽  
Nutrient Composition ◽  
Vegetable Crops ◽  
Compost Maturity

Reproductive Potential and Nutritional Composition of Hermetia illucens (Diptera: Stratiomyidae) Prepupae Reared on Different Organic Wastes

2019 ◽  
Vol 113 (1) ◽  
pp. 527-537 ◽  
Author(s):  
Sheng Yin Wang ◽  
Lingli Wu ◽  
Baoling Li ◽  
Dayu Zhang
Keyword(s):  
Food Waste ◽  
Reproductive Potential ◽  
Organic Wastes ◽  
Nutrient Composition ◽  
Biodiesel Production ◽  
Chicken Manure ◽  
Intrinsic Rate Of Increase ◽  
Pig Manure ◽  
Cow Dung ◽  
Hermetia Illucens

Abstract Hermetia illucens L. (the black soldier fly) has received increased attention because of its great potential in converting organic waste into a renewable resource. The prepupae have high proportions of proteins and fats and can serve as feedstuff for livestock and as feedstock for biodiesel production. With the goal to upgrade the conversion of low-value organic wastes into high-value proteins and fat on a large scale, the effects of the feedstuffs food waste, pig manure, chicken manure, and cow dung on the reproductive potential and nutrient composition of H. illucens were evaluated. The intrinsic rate of increase of H. illucens fed food waste (0.1249 d−1) was significantly greater than the rate of those fed pig manure (0.1167 d−1), chicken manure (0.1154 d−1), and cow dung (0.1049 d−1). The ash content of H. illucens fed food waste (30.8 g·kg−1 lyophilized prepupa matter (LPM)) was significantly lower than that of those fed chicken manure (37.6 g·kg−1 LPM) and cow dung (49.5 g·kg−1 LPM). The contents of crude fat, 372.4 g·kg−1 LPM, and protein, 436.9 g·kg−1 LPM, in prepupae fed food waste were the highest among the four treatments. The reproductive performance and prepupal nutrient composition indicated that food waste was the most suitable feed for H. illucens. The results from this study further demonstrate that the prepupae of H. illucens have great potential for use as a protein and fat source in animal feeds and as biodiesel material.

Commercial aquaponic system prototype, University of the Virgin Islands.

2020 ◽  
Author(s):  
Keyword(s):  
Plant Growth ◽  
Research Program ◽  
Virgin Islands ◽  
Organic Wastes ◽  
Vegetable Crops ◽  
Fish Waste ◽  
Commercial Scale ◽  
The University ◽  
Leaf Lettuce ◽  
System Prototype

Abstract Aquaponics is the combined culture of fish and plants in recirculating systems. Nutrients generated by the fish, either by direct excretion or the microbial breakdown of organic wastes, are absorbed by plant crops cultured hydroponically (without soil). Fish provide most of the nutrients required for plant growth. As the aquaculture effluent flows through the hydroponic component, fish waste metabolites are removed by nitrification and direct uptake by plants, thereby treating the water, which flows back to the fish-rearing component for reuse. The Aquaculture Research Program at the University of the Virgin Islands (UVI) has developed a commercial-scale aquaponic system for production of tilapia and hydroponic vegetables. The system, which occupies 0.05 ha of land, can annually produce 4.2-4.8 t of tilapia and 5 t of basil or 2.9 t of okra or 1400 cases (24-30 heads per case) of leaf lettuce. Research is being conducted on other vegetable crops.

Thermal/electric energy generation and CO2 production for greenhouse facilities

2019 ◽  
Vol 2 (3) ◽  
pp. 141-151
Author(s):  
O. E. Gnezdova ◽  
E. S. Chugunkova
Keyword(s):  
Carbon Dioxide ◽  
Power Distribution ◽  
Power Plants ◽  
Electric Energy ◽  
Electricity Consumption ◽  
Vegetable Crops ◽  
Carbon Dioxide Injection ◽  
Electricity Rates ◽  
Traditional Patterns ◽  
Generation Power

Introduction: greenhouses need microclimate control systems to grow agricultural crops. The method of carbon dioxide injection, which is currently used by agricultural companies, causes particular problems. Co-generation power plants may boost the greenhouse efficiency, as they are capable of producing electric energy, heat and cold, as well as carbon dioxide designated for greenhouse plants.Methods: the co-authors provide their estimates of the future gas/electricity rates growth in the short term; they have made a breakdown of the costs of greenhouse products, and they have also compiled the diagrams describing electricity consumption in case of traditional and non-traditional patterns of power supply; they also provide a power distribution pattern typical for greenhouse businesses, as well as the structure and the principle of operation of a co-generation unit used by a greenhouse facility.Results and discussion: the co-authors highlight the strengths of co-generation units used by greenhouse facilities. They have also identified the biological features of carbon dioxide generation and consumption, and they have listed the consequences of using carbon dioxide to enrich vegetable crops.Conclusion: the co-authors have formulated the expediency of using co-generation power plants as part of power generation facilities that serve greenhouses.

Bok Choy, an Asian Leafy Green Vegetable Emerging in Florida

EDIS ◽  
2019 ◽  
Vol 2019 (6) ◽  
pp. 5
Author(s):  
Hai Liu ◽  
Guodong Liu
Keyword(s):  
Graduate Students ◽  
Crop Production ◽  
Health Benefits ◽  
Extension Agents ◽  
Vegetable Crops ◽  
Green Vegetable ◽  
General Overview

Asian vegetable crops are rapidly expanding in Florida in the last decade due to their health benefits combined with their high profitability. These crops can help increase vegetable growers’ income and diversify Florida’s crop production, and they are new to most Floridians. This new 5-page article provides a general overview of bok choy for vegetable growers, crop consultants, certified crop advisors, Extension agents, and graduate students. Written by Hai Liu and Guodong Liu and published by the UF/IFAS Horticultural Sciences Department.https://edis.ifas.ufl.edu/hs1337

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