Organic and Hydroponics Farming
Go organic” has become the battle-cry in the whole World. People believe food items labeled “organic” being automatically a better and healthier product.
Is this really true?
Both organic farming and hydroponic farming embrace a desire to protect our planet’s environment. Both methods steer clear of harmful chemical fertilizers and pesticides. Both seek to end irresponsible water pollution and soil contamination.
Organic farming is a method of crop and livestock production that involves much more than choosing not to use pesticides, fertilizers, genetically modified organisms, antibiotics and growth hormones.
The principal goal of organic farming is developing enterprises that are sustainable and harmonious with the environment.
The general principles of organic farming include following principles:
- protect environment, minimize soil degradation and erosion, decrease pollution, optimize biological productivity and promote a sound state of health
- maintain biological diversity within the system
- maintain long-term soil fertility by optimizing conditions for biological activity within the soil
- recycle materials and resources to the greatest extent possible within the enterprise
- prepare organic products, emphasizing careful processing, and handling methods in order to maintain the organic integrity and vital qualities of the products at all stages of production
- provide attentive care that promotes the health and meets the behavioural needs of livestock
- rely on renewable resources in locally organized agricultural systems
The organic standards generally prohibit products of genetic engineering and animal cloning, synthetic pesticides, synthetic fertilizers, sewage sludge, synthetic drugs, synthetic food processing aids and ingredients, and ionizing radiation. Prohibited products and practices must not be used on certified organic farms for at least three years prior to harvest of the certified organic products. Livestock must be raised organically and fed 100 per cent organic feed ingredients.
Organic farming presents many challenges. Some crops are more challenging than others to grow organically; however, nearly every commodity can be produced organically.
However organic products can’t be justified on their appearance. They must be certified by third party organization.
Local Organic Certification Systems
More than 43 countries have already developed their own organic standards and certification systems while 12 are at their stage of drafting. In Hong Kong, we have 3 sets of organic standards being developed by 3 organizations from 2000 to 2002.
These 3 organizations are:
1) The Agriculture, Fisheries and Conservation Department
2) Hong Kong Organic Farming Association
3) Hong Kong Organic Certification Centre (formerly the Garden Farm) where the Hong Kong Organic Certification Centre provides certification services as well.
Organic Farming part 1
Organic Farming part 2
Hydroponics 水耕, or growing plants in a nutrient solution root medium, is a growing area of commercial food production and also used for home food production by hobbiest.
Hydroponics is a method of growing plants in nutrient solutions and/or inert media such as hydrocorn, perlite, sand, or other inert media rather than traditional potting mixes or soil. The technique used may include Aeroponics, Ebb and Flow, Flood and Drain Subirrigation, Top Irrigation, Deep Water Culture, or Passive Hydroponics.
Type of hydroponic growing systems
1. Aeroponic System: One of the most high tech growing systems
2. Drip System: The most widely used type of hydroponic systems 滴灌
3. Ebb and Flow System: The system can be modified in many ways
4. N.F.T.: Nutrient Film Technique System – most commonly thought of
5. Water Culture System: A very simple to use hydroponic system
6. Wick System: The simplest of all hydroponic systems
Amazing Hydroponic farm Japan Gandpa Dome
Hydroponic – Flood & Drain Basic Rundown
It has been argued on several articles that crops grown in hydroponic may NOT be rich in minerals. It is because most of the latter are water insoluble and the crops are feed with nutrient-rich water.
有些人發表文章, 認為對在水中培育的農作物, 不可能含有豐富的礦物質. 因為礦物大多不溶於水, 而和農作物是依賴水中的養份生長.