Aquaponics Extras

 TOPICS
#1-Duckweed
#2-Permaculture
#3-Vermiculture
#4-Vertical Farming
#5-Organic Farming


1-DUCKWEED

A NEW AQUATIC FARMING SYSTEM FOR DEVELOPING COUNTRIES
by Paul Skillicorn, William Spira and William Journey

Although duckweed species are familiar to most people who have seen the tiny aquatic plants covering stagnant water bodies, few people realize their potential. Until a few years ago, man made little use of duckweed species. Their unique properties, such as their phenomenal growth rate, high protein content, ability to clean wastewater and thrive in fresh as well as brackish water, were only recognized by a few scientists.

Prior to 1988 duckweed had been used only in commercial applications to treat wastewater in North America. In 1989 staff of a non-governmental organization based in Columbia, Maryland, The PRISM Group, initiated a pilot project in Bangladesh to develop farming systems for duckweed and to test its value as a fish feed. An earlier project in Peru investigated the nutritional value of dried duckweed meal in poultry rations.

The results of the pilot operations were extremely promising; production of duckweed-fed carp far exceeded expectations, and dried duckweed meal provided an excellent substitute for soy and fish meals in poultry feeds. Duckweed could be grown using wastewater for nutrients, or alternatively using commercial fertilizers.
During start-up of the pilot operations it also became apparent how little is known about the agronomic aspects of producing various species of the duckweed family, and exactly why it is so effective as a single nutritional input for carp and other fish.

Although these pilot operations were located in South Asia and Latin America, the results suggested that the plant would be important as a source of fish and poultry feed and simultaneously as a wastewater treatment process in selected areas of the Middle East, particularly in Egypt and Pakistan.

Technical and agronomic information about duckweed culture and feed use, and details of farming duckweed and fish in a single system, are not easily available to the general public, let alone to fish farmers in developing countries. The pilot operations in Bangladesh demonstrated that duckweed and fish culture can succeed commercially, although such ventures would initially require technical assistance and information. In many other areas of the world pilot operations linked to applied research may be required to review production parameters before commercial operations should be initiated. This Technical Study was therefore designed to bring together, in one publication, relevant information on duckweed culture and its uses to make people worldwide aware of the potential of this plant, to disseminate the currently available technical and agronomic information, and to list those aspects that require further research, such as duckweed agronomy, genetics and use in animal feeds.

This Technical Study is aimed at the following audiences:
(a) established fish farmers who would like to experiment with duckweed as a fish feed, and staff of agricultural extension services involved in fish culture;
(b) scientists of aquaculture research institutes who may initiate pilot operations and applied research on duckweed;
(c) staff of bilateral and multilateral donor agencies who may promote funding for duckweed research and pilot operations; and
(d) wastewater specialists in governments and donor agencies who may promote wastewater treatment plants based on duckweed in conjunction with fish culture.

Link: http://www.p2pays.org/ref/09/08875.htm

Duckweed Tips

• Duckweed has very similar characteristics to soybeans.
• The cost savings of using duckweed over commercial feed can be significant.
• You can combine duckweed with commercial fish feed but tilapia do just fine on duckweed alone.
• Supplements can be added to the water to achieve pH stability if needed.
• If the duckweed starts to over take your water source scoop out the excess with the net and bucket. 
• If the tilapia eat all the duckweed start again with a larger supply.

Link: http://www.ehow.com/

2-PERMACULTURE 

Introduction to Permaculture

The word "permaculture" was coined in 1978 by Bill Mollison, an Australian ecologist, and one of his students, David Holmgren. It is a contraction of "permanent agriculture" or "permanent culture."
Permaculture is about designing ecological human habitats and food production systems. It is a land use and community building movement which strives for the harmonious integration of human dwellings, microclimate, annual and perennial plants, animals, soils, and water into stable, productive communities. The focus is not on these elements themselves, but rather on the relationships created among them by the way we place them in the landscape. This synergy is further enhanced by mimicking patterns found in nature.

A central theme in permaculture is the design of ecological landscapes that produce food. Emphasis is placed on multi-use plants, cultural practices such as sheet mulching and trellising, and the integration of animals to recycle nutrients and graze weeds.

However, permaculture entails much more than just food production. Energy-efficient buildings, waste water treatment, recycling, and land stewardship in general are other important components of permaculture. More recently, permaculture has expanded its purview to include economic and social structures that support the evolution and development of more permanent communities, such as co-housing projects and eco-villages. As such, permaculture design concepts are applicable to urban as well as rural settings, and are appropriate for single households as well as whole farms and villages.

"Integrated farming" and "ecological engineering" are terms sometimes used to describe perma-culture, with "cultivated ecology" perhaps coming the closest. Though helpful, these terms alone do not capture the holistic nature of permaculture; thus, the following definitions are included here to provide additional insight.

Characteristics of Permaculture

• Permaculture is one of the most holistic, integrated systems analysis and design methodologies found in the world.
• Permaculture can be applied to create productive ecosystems from the human-use standpoint or to help degraded ecosystems recover health and wildness. Permaculture can be applied in any ecosystem, no matter how degraded.
• Permaculture values and validates traditional knowledge and experience. Permaculture incorporates sustainable agriculture practices and land management techniques and strategies from around the world. Permaculture is a bridge between traditional cultures and emergent earth-tuned cultures.
• Permaculture promotes organic agriculture which does not use pesticides to pollute the environment.
• Permaculture aims to maximize symbiotic and synergistic relationships between site components.
• Permaculture is urban planning as well as rural land design.
• Permaculture design is site specific, client specific, and culture specific.

The Practical Application of Permaculture

Permaculture is not limited to plant and animal agriculture, but also includes community planning and development, use of appropriate technologies (coupled with an adjustment of life-style), and adoption of concepts and philosophies that are both earth-based and people-centered, such as bioregionalism.
Many of the appropriate technologies advocated by permaculturists are well known. Among these are solar and wind power, composting toilets, solar greenhouses, energy efficient housing, and solar food cooking and drying.

Due to the inherent sustainability of perennial cropping systems, permaculture places a heavy emphasis on tree crops. Systems that integrate annual and perennial crops—such as alley cropping and agroforestry—take advantage of "the edge effect," increase biological diversity, and offer other characteristics missing in monoculture systems. Thus, multicropping systems that blend woody perennials and annuals hold promise as viable techniques for large-scale farming. Ecological methods of production for any specific crop or farming system (e.g., soil building practices, biological pest control, composting) are central to permaculture as well as to sustainable agriculture in general.

Since permaculture is not a production system, per se, but rather a land use and community planning philosophy, it is not limited to a specific method of production. Furthermore, as permaculture principles may be adapted to farms or villages worldwide, it is site specific and therefore amenable to locally adapted techniques of production.

As an example, standard organic farming and gardening techniques utilizing cover crops, green manures, crop rotation, and mulches are emphasized in permacultural systems. However, there are many other options and technologies available to sustainable farmers working within a permacultural framework (e.g., chisel plows, no-till implements, spading implements, compost turners, rotational grazing). The decision as to which "system" is employed is site-specific and management dependent.

Farming systems and techniques commonly associated with permaculture include agroforestry, swales, contour plantings, Keyline agriculture (soil and water management), hedgerows and windbreaks, and integrated farming systems such as pond-dike aquaculture, aquaponics, intercropping, and polyculture.
Gardening and recycling methods common to permaculture include edible landscaping, keyhole gardening, companion planting, trellising, sheet mulching, chicken tractors, solar greenhouses, spiral herb gardens, swales, and vermicomposting.

Water collection, management, and re-use systems like Keyline, greywater, rain catchment, constructed wetlands, aquaponics (the integration of hydroponics with recirculating aquaculture), and solar aquatic ponds (also known as Living Machines) play an important role in permaculture designs.

 

The Ethics of Permaculture

Permaculture is unique among alternative farming systems (e.g., organic, sustainable, eco-agriculture, biodynamic) in that it works with a set of ethics that suggest we think and act responsibly in relation to each other and the earth.

The ethics of permaculture provide a sense of place in the larger scheme of things, and serve as a guidepost to right livelihood in concert with the global community and the environment, rather than individualism and indifference.

1. Care of the Earth
   ...includes all living and non-living things—plants, animals, land, water and air
2. Care of People
   ...promotes self-reliance and community responsibility—access to resources necessary for existence
3. Setting Limits to Population & Consumption
   ...gives away surplus—contribution of surplus time, labor, money, information, and energy to achieve the aims of earth and people care.

Permaculture also acknowledges a basic life ethic, which recognizes the intrinsic worth of every living thing. A tree has value in itself, even if it presents no commercial value to humans. That the tree is alive and functioning is worthwhile. It is doing its part in nature: recycling litter, producing oxygen, sequestering carbon dioxide, sheltering animals, building soils, and so on.

The Principles of Permaculture Design

Whereas permaculture ethics are more akin to broad moral values or codes of behavior, the principles of permaculture provide a set of universally applicable guidelines which can be used in designing sustainable habitats. Distilled from multiple disciplines—ecology, energy conservation, landscape design, and environmental science—these principles are inherent in any permaculture design, in any climate, and at any scale.

1. Relative location
2. Each element performs multiple functions
3. Each function is supported by many elements
4. Energy efficient planning
5. Using biological resources
6. Energy cycling
7. Small-scale intensive systems
8. Natural plant succession and stacking
9. Polyculture and diversity of species
10. Increasing "edge" within a system
11. Observe and replicate natural patterns
12. Pay attention to scale
13. Attitude

3-VERMICULTURE

Vermiaquaponics by Great Lakes Aquaponics

http://greatlakesaquaponics.wikispaces.com/Vermiaquaponics

Vermiaquaponics is actually a word my father and I invented. It is in laymans terms the same thing as aquaponics but with a combination of worm breeding. You use the worm castings to make a nutrient tea which is then used to feed the plants through their roots directly and in the form of foliar feeding. Foliar feeding is when you feed a plant through its leaves. You spray the tea onto the leaves directly and the goal is to have the nutrients be absorbed in more than one way. Then the worms themselves are used to feed the fish thus eliminating some of the cost of fish feed, and making these aquaponic systems more self sustainable.

Vermiaquaponics will soon become the future of aquaponics. In a way many people use certain aspects of it by feeding their plants with extra micronutrients and such.(for example chelated iron, manganese, zinc, etc) But what makes this version so unique is that it will help eliminate the cost of fish feed which becomes an enormous expense. In addition you are feeding your fish great protein which should theoretically help them to grow faster and bigger. Although worms do not give fish 100% of their diet, and are nearly 90% composed of water, so supplements will be required. So essentially your getting your fish wish less cost improving your profit. 

One concern I have about this new form of growing is when it gets to the commercial scale. Places like the University of the Virgin Islands are harvesting over 5 tons of fish annually and in order for something like this to be beneficial to them you would need a very vast number of worms. Making vermiaquaponics less practical on a commercial scale but definately beneficial on the hobby scale. Something to consider if trying to convert from aquaponics to vermiaquaponics is that you will need the space to grow your worms, and to make sure you will have enough worms to be able to integrate this technology into aquaponics.

The focus on vermiaquaponics is to not incorporate it in systems producing such high quantities of fish. For the Urban Farmer, primary focus should be on plant growth in order to make profit. Using as little fish as possible and supplementing with tea will reduce other costs. The key is to get the right number of fish to plant growth ratio and also adding the vermiaquaponics side of the equation. When all these numbers can be worked out maximum plant growth to cost can be achieved giving you maximum profit.

4-VERTICAL FARMING

Vertical Farms 
(credit to: http://www.verticalfarm.com )

Problem Statement

By the year 2050, nearly 80% of the earth's population will reside in urban centers. Applying the most conservative estimates to current demographic trends, the human population will increase by about 3 billion people during the interim. An estimated 109 hectares of new land (about 20% more land than is represented by the country of Brazil) will be needed to grow enough food to feed them, if traditional farming practices continue as they are practiced today. At present, throughout the world, over 80% of the land that is suitable for raising crops is in use (sources: FAO and NASA).

Potential Solution

The concept of indoor farming is not new, since hothouse production of tomatoes, a wide variety of herbs, and other produce has been in vogue for some time. What is new is the urgent need to scale up this technology to accommodate another 3 billion people. An entirely new approach to indoor farming must be invented, employing cutting edge technologies. The Vertical Farm must be efficient (cheap to construct and safe to operate). Vertical farms, many stories high, will be situated in the heart of the world's urban centers. If successfully implemented, they offer the promise of urban renewal, sustainable production of a safe and varied food supply (year-round crop production), and the eventual repair of ecosystems that have been sacrificed for horizontal farming.

Vertical Farms' Advantages

• Year-round crop production; 1 indoor acre is equivalent to 4-6 outdoor acres or more, depending upon the crop (e.g., strawberries: 1 indoor acre = 30 outdoor acres) 
• No weather-related crop failures due to droughts, floods, pests 
• All VF food is grown organically: no herbicides, pesticides, or fertilizers 
• VF virtually eliminates agricultural runoff by recycling black water 
• VF returns farmland to nature, restoring ecosystem functions and services 
• VF greatly reduces the incidence of many infectious diseases that are acquired at the agricultural interface 
• VF converts black and gray water into potable water by collecting the water of evapotranspiration 
• VF adds energy back to the grid via methane generation from composting non-edible parts of plants and animals 
• VF dramatically reduces fossil fuel use (no tractors, plows, shipping.) 
• VF converts abandoned urban properties into food production centers 
• VF creates sustainable environments for urban centers 
• VF creates new employment opportunities 
• We cannot go to the moon, Mars, or beyond without first learning to farm indoors on earth 
• VF may prove to be useful for integrating into refugee camps 
• VF offers the promise of measurable economic improvement for tropical and subtropical LDCs. If this should prove to be the case, then VF may be a catalyst in helping to reduce or even reverse the population growth of LDCs as they adopt urban agriculture as a strategy for sustainable food production. 
• VF could reduce the incidence of armed conflict over natural resources, such as water and land for agriculture

5-ORGANIC FARMING

• Organic Grown Food

http://www.epa.gov/agriculture/torg.html

"Organically grown" food is food grown and processed using no synthetic fertilizers or pesticides. Pesticides derived from natural sources (such as biological pesticides) may be used in producing organically grown food.

• Organic Farming

http://en.wikipedia.org/wiki/Organic_farming

Organic farming is a form of agriculture that relies on techniques such as crop rotation, green manure, compost and biological pest control. Organic farming uses fertilizers and pesticides but excludes or strictly limits the use of manufactured (synthetic) fertilizers, pesticides (which include herbicides, insecticides and fungicides), plant growth regulators such as hormones, livestock antibiotics, food additives, genetically modified organisms, human sewage sludge, and nanomaterials.

Organic agricultural methods are internationally regulated and legally enforced by many nations, based in large part on the standards set by the International Federation of Organic Agriculture Movements (IFOAM), an international umbrella organization for organic farming organizations established in 1972. IFOAM defines the overarching goal of organic farming as:

"Organic agriculture is a production system that sustains the health of soils, ecosystems and people. It relies on ecological processes, biodiversity and cycles adapted to local conditions, rather than the use of inputs with adverse effects. Organic agriculture combines tradition, innovation and science to benefit the shared environment and promote fair relationships and a good quality of life for all involved..."

—International Federation of Organic Agriculture Movements

• Organic Products 

http://www.ams.usda.gov/AMSv1.0/getfile?dDocName=STELDEV3004446&acct=nopgeninfo

Organic products have strict production and labeling requirements. Unless noted below, organic products must meet the following requirements:

- Produced without excluded methods; genetic engineering, ionizing radiation, or sewage sludge.

- Produced per the National List of Allowed and Prohibited Substances (National List).

- Overseen by a USDA National Organic Program authorized certifying agent,

- Following all USDA organic regulations.

An overview of labeling the various categories of organic products is provided below.

PRINCIPAL DISPLAY PANEL: portion of the package most likely to be seen by customers at the time of purchase.

INFORMATION PANEL: includes ingredient statement (list of ingredients contained in a product, from highest to lowest percentage of final product) and other product information.

• 100% Organic

Raw or processed agricultural products in the “100 percent organic” category must meet these criteria:

- All ingredients must be certified organic.

- Any processing aids must be organic.

- Product labels must state the name of the certifying agent on the information panel.

An overview of labeling the various categories of 100% organic products is provided below.

PRINCIPAL DISPLAY PANEL: May include USDA organic seal and/or 100 percent organic claim.

INFORMATION PANEL: Must identify organic ingredients (e.g., organic dill) or via asterisk or other mark.

• Normal Organic

Raw or processed agricultural products in the “organic” category must meet these criteria:

- All agricultural ingredients must be certified organic, except where specified on National List.

- Non-organic ingredients allowed per National List may be used, up to a combined total of five percent of non-organic content (excluding salt and water).

- Product labels must state the name of the certifying agent on the information panel.

An overview of labeling the various categories of normal organic products is provided below.

PRINCIPAL DISPLAY PANEL: May include USDA organic seal and/or organic claim.

INFORMATION PANEL: Must identify organic ingredients (e.g., organic dill) or via asterisk or other mark.

• Organic Certification

http://en.wikipedia.org/wiki/Organic_certification

Organic certification is a certification process for producers of organic food and other organic agricultural products. In general, any business directly involved in food production can be certified, including seed suppliers, farmers, [food] processors, retailers and restaurants.

Requirements vary from country to country, and generally involve a set of production standards for growing, storage, processing, packaging and shipping that include:

• no human sewage sludge fertilizer used in cultivation of plants or feed of animals
• avoidance of synthetic chemical inputs not on the National List of Allowed and Prohibited Substances (e.g. fertilizer, pesticides, antibiotics, food additives, etc.), genetically modified organisms, irradiation, and the use of sewage sludge;
• use of farmland that has been free from prohibited synthetic chemicals for a number of years (often, three or more);
• keeping detailed written production and sales records (audit trail);
• maintaining strict physical separation of organic products from non-certified products;
• undergoing periodic on-site inspections.