A Small Green Empire in the Heart of a Concrete City -Nadira Islam
The warming of the earth is increasing in climate change, and the rise in warming is being observed more widely in the urbanization revolution. Green is quickly disappearing from the cities of civil civilization built on brick and mortar. But in the rural environment, some people in the green-growing civil society want to retain green in their homes. But in an age of growing urbanization, you can build a green empire not only in flowers but also in concrete. Amateurs are building roof gardens on the roof shaved by their own thoughts and efforts to retain the green in their homes. With time, this garden is no longer stuck in amateurism. These roof gardens have become a meeting fair for meeting family nutrition needs, family entertainment and leisure with safe vegetables. The trend of building rooftop gardens is increasing day by day to ensure health awareness and safe fruit vegetable availability facilities.
Rooftop gardens are not a new idea. Even in the ancient civilization, the history of rooftop gardens can be seen. Even before christ’s birth, there were signs of setting up gardens and small trees in the pyramid-shaped high-rise stone structures called Mesopotium and Jukurak in Persia. Near the city of Pompeii, only a certain roof was built in the Roman Villa, a sign of ancient civilization, to garden. In the 11th century old city of Cairo, multi-storey edifices were built, some of which stretched to fourteen floors. Gardens were placed on the roofs of all these buildings as part of the beauty so that the wheels were turned and water was drawn from the bottom to the top with the help of animal power to irrigate them. Babylon’s hanging garden is also believed to be made of various roofs and verandas, but historically the park has not existed, but at that time another hanging park is found near the iraqi city of Mosul. (Bangladesh Agricultural Service)
In many countries, green urbanization is being made in every phase of house roofs, verandahs, car verandas, footpaths, parks, government land, horticulture management, especially horticulture crops and bahari flowering trees to protect the environment and reduce the temperature of the city. Setting up roof gardens in the city reduces the temperature in the city by a few degrees. The existence of soil in our cities is decreasing day by day. Instead of brick-and-mortar buildings, steel structures and glass-wrapped multi-storey edifices are growing rapidly. When a garden is placed in the building or its structure, the surface of the garden tree absorbs heat and the water that comes out of the tree’s body in the form of water vapour reduces the temperature at the designated place by a few degrees. Numerous roof gardens or urban vegetation reduce the high temperature of the city in the process.
The first condition of the roof garden is to pick trees. That is, small trees should be planted and hybrid fruit trees can be planted so that small trees bear more fruits. Mangoes, guavas, apple cools, olives, karamcha, sharifa, flour, amra, lemon, pomegranate, papaya, and even banana trees can be planted. Vegetables: brinjal, tomato, dhendas, chukur, capsicum, bean, barbati, cucumber, bitter gourd, gourd, dhundal, baramasisajina, red leafy, stalkshak, poishak, kalmishak, broccoli, radish. Spices: chilli, coriander leaves, bilati coriander, mint, curry leaves, onions, garlic, ginger, pepper, palm. Medicinal properties: Aloe vera, tulsi, thankuni, chirata, stia, gaynora. Flower National: Roses, Bellies, Togars, Jasmine, Gandharaj, Jaba, Tikoma, Zarbera, Shiuli, Alamanda, Bagunvilla and various seasonal flowers.
Half drums, cement or earthen tubs, steel or plastic trays should be collected as per the demand. Sometimes broken stolen buckets of settlements, unused oil bottles are also used to plant small trees. Using these unused items in the garden with the right innovative power can also be a new aesthetic. Permanent beds (to be kept empty between roofs and beds) can be set up at places like roof facilities. These can be mainly grown in vegetables and vegetables. If you want, you can plant a flowering tree. If you don’t want to build a permanent bed, the old cistern or the ship’s life boat shell is also used as a bed in many places.
How different layers of tubs can be made suitable for planting trees:
a. Low level: Filling 3-4 inches with small pieces of low cost of third grade bricks;
b. The level above it: 2-3 inches thick and filled this second layer with charcoal;
c. Level 3: 2-3 inches thick lying in a piece of narikel or decorated with a knife of a narikel;
d. Level 4: Filling 2-3 inches thick with thick sand (Sylhet sand) or small stone kuchi/brick chips;
e. The last or upper level: 2-2.5 feetis filled with good quality potting mediaand the roof will be more suitable for garden trees.
Methods of creating potting media: Readymade potting media made mainly of pitmus, pitusal and organic matter (compost) is available in various local nurseries in other countries. Following is a proportional rate of what is available in this country to create good quality media:
a. Cocoa dust or narikel powder – 25%
b. Thick sand (Sylhet Sand) – 10%
c. Vitte soil (which is available in nursery) – 25%
d. Garbage rotten/rotten dung – 30%
e. Small third grade brick chips/khoya – 10%
If they are well mixed and filled with the remaining part of the box/tub, the tree will grow quickly and yield more yield. It is better to use some saw mill powder, vermi compost or compost produced by reliable organizations with the media and mix some bone powder and khail with it.Halfdrum is one of the popular methods of planting trees on the roof. In this case, brick pieces have to be placed at an inch height by piercing under the halfdrum. An inch of organic manure or rotten dung should be placed on top of it. As a result, there will never be too much water accumulated at the base of the tree. Along with organic manure, you can use 200 grams of TSP, 100 grams of MOP in each drum. In the case of vegetables or flowers, small or medium tubs are running, but if there is a fruit tree, the benefit is more when the pot is large.
It is best to avoid as many chemical pesticides as possible to prevent diseases. In a short range of gardens, 100 per cent of the diseases can be curbed biologically. Soak 2-3 grams of chilli powder in a litre of water and strain it the next day and mix 2 grams of detergent powder and a teaspoon of onion juice together and spray it at a interval of 8-10 days to keep the tree safe from insects based on organic methods.Washing fish, meat and curry water is used in trees to make up for the lack of tree food. It is also good to apply mixed fertilizers, bone powders occasionally and food (zinc, boron, magnesium, manganese) once a year. It is better to use fish thorns, bone fragments, egg shells, abandoned pieces of curry, leaves, in a drum and used in the roof garden.
It is best to make the members of the roof garden family a source of light physical labour and entertainment every day. This will give rise to a kind of love for the environment by taking care of the elderly as well as flowers, fruits and plants. It is extremely important for the generation living in brick wood towns.
Nadira Islam is an Associate Editor (The Environment Review), Department of Environmental Science and Engineering, JatiyaKabiKaziNazrul Islam University, Trishal, Mymensingh