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Key techniques of vegetable plug seedling


The characteristics of plug seedling
Concept: to peat, vermiculite as matrix, for containers with different hole tray, precision seeding production line automatic loading matrix, sowing and covering, compacting, watering, and then put in a germination chamber and greenhouse facilities for environmental control and cultivate, a into seedlings of modern breeding system.
2, characteristics: wide adaptability, can be planted a variety of crops; root and the substrate tightly wound, no slow seedling
3, compared with the advantages of traditional breeding:
(1) energy saving. Traditional seedlings of 100 /M2, plug seedlings 700-1000 strain /M2, energy saving 2/3
(2) labor saving, high efficiency. The traditional nursery soil Tuo 500-700g, plug matrix is less than 50g
(3) the quality of seedlings is high.
(4) suitable for long distance transportation.
Two, the key technology of vegetable plug seedling
(a) the selection of acupuncture points
Tray is an important carrier of the plug seedlings by sampling different points for polystyrene foam hole plates and plastic tray, the latter is more and more widely used, standard size 54cm * 28cm, 20, 50, 72, 128, 200, 288, 400, 512 nursery holes. When the seedling tray hole number and choice of vegetable species and seedling length.
(two) selection and proportioning of matrix
Seedling root growth space and rhizosphere environment and traditional seedling difference large, suitable for hole disc roots growth of seedling substrate should have the following characteristics: Paul fertilizer ability strong, meet the root development required nutrient, avoid the loss of nutrients, water retention capacity, avoid root water rapid evaporation.
The air permeability is good, and the root is not easy to break down, which is not easy to break down, which is favorable for the root penetration and can support the plant.
Common professional nursery substrate: Canada Fafard nursery peat, the sun Sungro, Earl (Berger), German kratzmann (Klasman) and other, which is characterized in that the pH, EC conditioned, add the starting water absorbent and slow release fertilizer, water gas ratio coordination, good effect of seedling cultivation, but the price than the domestic base.
1, commonly used matrix physical and chemical properties
Peat, vermiculite, perlite, carbonized rice husk, sawdust and plug seedlings commonly used type of matrix and the physico-chemical properties of these substrates mainly include:
The degree of decomposition of the organic matrix was related to the bulk density, total porosity, and the absorption and buffering of the matrix.
The PH of the matrix: effects on seedling roots, different matrix PH is different, most horticultural crops require slightly acidic to neutral PH.
Matrix of cation exchange capacity and buffering capacity: matrix for cation exchange capacity is adsorbed by organic matter and organic and inorganic colloidal exchangeable cations, with 100 grams of substitution matrix absorption cations milligram equivalent number of said. The higher the organic matter content, the greater the cation exchange capacity, the stronger the buffer capacity of the substrate, the stronger the ability of holding water and fertilizer.
The total porosity of the matrix is the sum of the porosity and the pore volume of the matrix. The total porosity of the ideal matrix was 80%-95%.
In addition, the need to understand the nutritional properties of matrix, including: matrix of the nutrient supply; matrix in the supply of nutrient concentration and intensity levels; between the matrix nutrient supply rate and distribution and N, P, K ratio.
2, the main types of matrix
Peat: according to peat formation of geographical conditions, plant species and degree of decomposition can divided into high peat, peat low and median peat.
Low Peat: distribution in low-lying seeper of swamps and marshes, a high degree of decomposition, nutriment in a fertilizer availability is high, can be directly used as fertilizer, but due to significant capacity, water permeability difference, not to do nursery substrate
High Peat: dominated by Sphagnum plants, distribution in the low peat formation terrain height, degree of decomposition, low, small bulk density, water permeability good, is a good seedling substrate. PH4-5
In a peat: nature between high and low peat can be used as a substrate
The physical properties of different sources of peat

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