Prospects from the model of growing straw mushroom in a closed house

Friday, 29 October 2021 00:38

(AG Provincial E-Portal) -  Among mushrooms being grown today, straw mushrooms are nutritious food and bring many high economic benefits, especially they are suitable for smallholder farming land. Many advanced techniques of growing mushrooms have been researched and equipped to farmers by the agricultural sector, in which the latest technique is to grow straw mushrooms in a closed house. In Chau Thanh district, the model has been evaluated by the agricultural sector for economic efficiency, and is being replicated throughout the district. In Chau Thanh district, the model has been evaluated by the agricultural sector for economic efficiency, and is being replicated throughout the district.

Chau Thanh district has an annual agricultural production land area of about 81.000 hectares, of which the output of straw from rice harvesting is estimated at about 243.000 tons. This is an abundant source of raw materials to encourage farmers, especially idle workers to implement the mushroom growing model, to help improve family income and create more jobs for rural workers.

Mr. Pham Ngoc Luu with the model of growing straw mushroom

With the support of scientific and technical transfer of the professional branch, Mr. Pham Ngoc Luu in Binh Phu II hamlet, Binh Hoa commune has pioneered the investment in pilot selection of a cylindrical straw mushroom growing model, at the same time, applied science and technology to production in order to improve productivity and provide stable economic efficiency. Initially, the model has brought positive effects, achieving 100% higher productivity than traditional production methods.

With the guidance and capital support of the Chau Thanh District Agricultural Extension Station, through the cooperation project between An Giang and Sweden, Mr. Pham Ngoc Luu implements the scale of the mushroom house on an area of 42m2 (6m x 7m) and 3.5m high. In order for the mushroom house to retain moisture well, Mr. Luu uses a foam sheet on the roof and wall, adds a rubber sheet outside to limit light, the floor is covered with cement, in addition, the mushroom house is also arranged with a window for ventilation. In the house, a bulb is attached to regulate the temperature and humidity in the mushroom tissue. Instead of growing mushrooms according to the traditional method of outdoor straw, this model is done in a closed house and materials are piled up. Before adding the mushroom tissue, Mr. Luu sprayed disinfectant or used antiseptic lime in and around the mushroom house.

Mr. Pham Ngoc Luu said, “The model is made indoors with an area of 42 square meters, arranged 26 pillars, each column is 1.2 meters high, the cylinder diameter is 0.4 meters, the pillar is 1m away from the other. Raw materials to prepare include 40 rolls of straw, cotton at the rate of 10% compared with raw materials of straw, 6 bags of seed for each post. The used mushroom grain spawn must be selected from a mushroom species that grows well which have clear white filaments, the mycelium grows evenly on the surface of the grain spawn medium, the filament grows evenly, without distortion or no dark spots or unusual color. To increase productivity, mushroom grain spawns are mixed with micronutrients that stimulate mycelium quickly.

After completing the design of the mushroom house and preparing all kinds of raw materials, Mr. Luu follows the sequence of planting steps: soaking the straw with lime water, incubating the straw 2 times (from 10 to 12 days) and incubating in cotton (6 days). The mushroom mold is a round plastic tube with a diameter of 0.4m, a length of 0.6m, which is cut along the plastic pipe in half, then welded the joint to fix the mold when piling. After incubation, the straw is pressed and loaded into a round mold. The straw layer is 20cm high, then spread to 2cm of cotton, then spread a layer of mushroom grain spawn, the process is done continuously until the pillar is 1.2m high. During growing, after 3 to 4 days we should check the temperature, moisture of mushroom tissues and mycelium growth. After 8 to 10 days, mycelium grows a lot and appears pins, and at the same time we start to light the lights continuously to stimulate the mushroom, the lighting time is from 9 pm to 4 am the next day. Only after 12 to 15 days is it possible to harvest mushrooms: the first harvest lasts from 8 to 9 days, then discontinue 1 - 2 days of tending. The second harvest lasts from 3 to 4 days, then ends the crop.

Mr. Luu shared:… “Of all 26 straw pillars, each pillar can harvest 5 kg of mushrooms, on average, each kg of mushrooms is sold for 36.500 VND, the total money from selling mushrooms is over 7, 1 million VND. By-products after growing mushrooms is sold for 500.000 VND”. Thus, the total revenue is more than 7,6 million VND, in which the total cost of investment in mushroom houses, raw materials, care and harvest is more than 4,1 million VND, he has a profit of over 3.5 million VND after 15 days of planting. Seeing the effectiveness of the pillar-shaped mushroom growing model, Mr. Luu is currently continuing to expand his house to grow on a larger area.

Farmers from communes in the district visited the model

It can be seen that growing straw mushrooms indoors in the direction of applying high technology is a new direction since there are many advantages compared to growing mushrooms outdoors. Specifically, farmers actively adjust the humidity, temperature, the cleaning of the mushroom growing area is more convenient, they can save the tissue area and do not depend on the weather as growing mushrooms outdoors. However, growing mushrooms indoors has the disadvantage that initial investment cost is quite high, which is to build and plant a house. Nevertheless, the method of growing straw mushrooms in a cylindrical shape has a lower investment cost than a shelf model, thanks to the use of straw mixed with cotton for higher yields than the traditional way of growing by 100% straw material. In addition, with the layout of each shelf with 3 or 4 floors, a mushroom house has from 2 or 3 shelves, which affects the ventilation or suffocating, the mushroom only grow well on the below floors and underdevelop on the upper floors. On the other hand, the cost of investment in shelves is also quite high and it is difficult to clean the farm ...

With the initial results, it shows that the indoor cylindrical mushroom growing model is a new direction for mushroom growers in the district, because it has many advantages such as easy care, easy harvest and convenient farm cleaning stage. In addition, the quality of indoor cylindrical straw mushroom products increases, which makes it easier to sell and the price is also higher ...Moreover, mushroom growing using straw mixed with cotton will help growers have more choices in using materials and agricultural by-products other than straw. This is a condition to promote the development of the mushroom growing area in Chau Thanh district, contributing to job creation for rural workers, providing stable income for people./.

Trúc Phương
Translator: Kim Thuan