Tobacco floating seedling substrate and preparation method thereof

Abstract

The invention relates to a tobacco floating seedling substrate and a preparation method thereof. The substrate contains 40-50% of turf, 10-20% of carbonized corn stalk granule, 10-20% of expanded perlite and 10-20% of vermiculite. The preparation method comprises the following steps of: crushing sun-dried corn stalks into rough granules; placing the rough granules in a carbonization furnace for high-temperature carbonization; crushing and screening after cooling; uniformly mixing with the turf, the expanded perlite and the vermiculite according to the raw material proportion; and carrying out sterilization. The corn stalks selected in the invention have the advantages of rich sources, low cost, various available nutrients and stable physical and chemical properties; by using the corn stalks to replace partial turf, the prepared substrate is loose, air-permeable, stable in structure, good in air permeability and water holding capacity, proper in pH value and large in cation exchange capacity, and has the effects of effectively ensuring the quality of floating seedling, bringing benefit to the sustainable development of the floating seedling substrate production, greatly reducing the seedling cost, solving the problem of insufficient sterilization, avoiding disease generation and having wide application prospect in tobacco floating seedling production.

Description

technical field [0001] The invention relates to tobacco floating seedling cultivation technology, in particular to a tobacco floating seedling cultivation substrate and a preparation method thereof. Background technique [0002] Floating seedling cultivation is a new method of seedling cultivation, which represents the most advanced seedling cultivation technology in the world today. The combination of health care cultivation and other advantages is a great change in seedling technology, and it has been widely used in the production of tobacco, vegetables, flowers, seedlings and other seedlings. [0003] Tobacco floating nursery substrate is the foundation of tobacco nursery and an important factor in determining the growth environment of tobacco seedling root system. In addition to supporting and fixing plants, it more importantly acts as a transfer station, allowing nutrients and water from nutrient solution to be transferred . At present, peat is the main component of t...

AI Technical Summary

Problems solved by technology

The above-mentioned floating seedling raising substrates all need to use decomposed plant stalks or chaff and bran as the main raw materials. There are long production cycles, time-consuming and laborious, and the degree of decomposing is difficult to control. The physical and chemical properties of the obtained substrates are difficult to maintain uniformity and stability. Its commercialization has formed a great restriction; and practical experience shows that improper selection of carbonized straw types and excessive use of carbonized straw will have adverse effects on the development of tobacco seedlings

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