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Earthworm allowed to eat the organic waste to produce Vermicompost in SEVAI Project |
‘An earthworm is known as farmer’s
friend” mentioned by K.Devendran,SG/OFI-SEVAI Coordinator in a training of farmers
trainers sessions of water and soil conservation techniques in Dasilnaickanoor
village recently. He enlightened the need for implementing organic farming and
the use of vermicompost.He further said, “An earthworm is a tube-shaped, segmented
worm commonly found living in soil that feeds on live and dead organic matter.
Its digestive system runs through the length of its body. Like microbes, they
also add humus to it by decomposing the dead plants and animals in the soil.
Humus is a storehouse of essential plant nutrients .It provides high water
absorption and water holding capacity through the soil by increasing air spaces.
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Moisturizing the organic waste and cow dung |
On turning the humus rich soil comes up. The manure gets mixed properly with
the soil when it is turned and loosened. Their purpose is simple but very
important. They are nature’s way of recycling organic nutrients from dead
tissues back to living organisms. SG/OFI/SEVAI Projects in Thottiyapatty and
Dasilnaickanoor have recognized the value of these worms. The earthworm is a
natural resource of fertility and life. Vermicomposting is essentially the consumption of organic material
by earthworms. This speeds up the process of decomposition and provides a
nutrient-rich end product, called vermicompost, in the form of .worm castings. Vemicompost as a bio-manure is produced
for promoting organic farming in Thottiyapatty region. Earthworms live in the
soil and feed on decaying organic material. After digestion, the undigested
material moves through the alimentary canal of the earthworm, a thin layer of
oil is deposited on the castings. This layer erodes over a period of 2 months.
So although the plant nutrients are immediately available, they are slowly
released to last longer. The process in the alimentary canal of the earthworm
transforms organic waste to natural fertilizer. The chemical changes that
organic wastes undergo include deodorizing and neutralizing. This means that
the pH of the castings is 7 (neutral) and the castings are odorless. The worm
castings also contain bacteria, so the process is continued in the soil, and
microbiological activity is promoted.
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Organic waste dumped in Vermicompost Yard in Thottiyapatty |
Vermicomposting
is the process of turning organic debris into worm castings. The
worm castings are very important to the fertility of the soil. The castings
contain high amounts of nitrogen, potassium, phosphorus, calcium, and
magnesium. Castings contain: 5 times the available nitrogen, 7 times the
available potash, and 1 ½ times more calcium than found in good topsoil, Earthworm
castings have excellent aeration, porosity, structure, drainage, and
moisture-holding capacity. The content of the earthworm castings, along with
the natural tillage by the worms burrowing action, enhances the permeability of
water in the soil. Worm castings can hold close to nine times their
weight in water. Vermicompost is nothing but the excreta of earthworms,
which is rich in humus and nutrients. By feeding these earthworms with biomass
and watching properly the food (bio-mass) of earthworms, we can produce the
required quantities of vermicompost. Manual harvesting involves hand-sorting,
or picking the worms directly from the compost by hand. This process can be
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Vermi compost storing place |
facilitated by taking advantage of the fact that worms avoid light. If material
containing worms is dumped in a pile on a flat surface with a light above, the
worms will quickly dive below the surface. These methods, like some of the
methods used in vermicomposting, are based on the worms’ tendency to migrate to
new regions, either to find new food or to avoid undesirable conditions, such
as dryness or light. The nutrients content in vermicompost vary depending on
the waste materials that are being used for compost preparation. If the waste
materials are heterogeneous one, there will be wide range of nutrients
available in the compost. If the waste materials are homogenous one, there will
be only certain nutrients are available.
The harvested vermicompost should be stored in dark, cool place. It should have
minimum 40% moisture. Sunlight should not fall over the composted
material. It will lead to loss of moisture and nutrient content. Vermicompost
is rich in all essential plant nutrients, Provides excellent effect on overall
plant growth, encourages the growth of new shoots / leaves and improves the
quality and shelf life of the produce. Vermicompost is free flowing, easy to
apply, handle and store and does not have bad odour,It improves soil structure,
texture, aeration, and water holding capacity and prevents soil erosion.
Vermicompost is rich in beneficial micro flora such as a fixers, It prevents
nutrient losses, Vermicompost is free from pathogens, toxic elements, weed
seeds etc, Vermicompost minimizes the incidence of pest and diseases, It
enhances the decomposition of organic matter in soil”.-Govin
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