Tobacco floating growing substrate and preparation method thereof

Abstract

The invention relates to a tobacco floating growing substrate and a preparation method thereof. The tobacco floating growing substrate comprises 65-80 percent of rotten peanut chaff, 10-20 percent of expanded perlite and 10-20 percent of vermiculite. The preparation method of the tobacco floating growing substrate comprises the following steps of: removing impurities from peanut shells and crushing the peanut shells to obtain peanut chaff of 3-6mm; adjusting the obtained peanut chaff until the water content is 60-70 percent; adding an HM (high methoxyl pectin) decomposition agent and uniformly mixing the HM decomposition agent with urea for stack retting; maintaining the temperature in the decomposition high-temperature stage to be 55-65DEG C; when the temperature in the stack is risen to over 65DEG C, turning stacks and reducing the temperature in time; when the temperature in the stack is recovered to normal temperature without raising, obtaining the rotten peanut chaff, sterilizing the rotten peanut chaff and uniformly mixing the rotten peanut chaff with the expanded perlite and the vermiculite according to the mixture ratio to form the tobacco floating growing substrate. The tobacco floating growing substrate has the advantages of moderate granularity, looseness and permeability, formed aggregated structure, favorable permeability and water retention property and stable physical and chemical properties; and the activities of tobacco nitrate reductase and saccharase can be improved and the development of a tobacco root system is promoted.

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...

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Problems solved by technology

[0004] In the prior art, tobacco stalks and rice straws are used instead of peat as the main raw materials for preparing tobacco floating seedling-growing substrates, such as the new-type tobacco-specific floating seedling-growing substrates disclosed in patent document CN101828506A, and tobacco stalks are derived from tobacco plants themselves. It is easy to produce adverse rhizosphere effects on the tobacco root system as a raw material for the preparation of tobacco seedlings; moreover, grass straw and other gramineous plant straws contain limited nutrients or difficult to coordinate the supply of nutrients, which in turn affects the growth of tobacco seedlings, and it is even more difficult to As effective as other substances in promoting or stimulating the growth of tobacco roots

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