Rice dedicated carbon matrix seedling substrate and preparation method thereof

Abstract

The invention discloses a nutritional type rice dedicated carbon matrix seedling substrate with strong water retention venting capability, which is prepared from the following raw materials of 30-40 parts of nitriding modified charcoal, 35-40 parts of air drying cow dung, 10-15 parts of pine needles, 8-10 parts of vermiculite, 3-5 parts of water-retaining agent and 1-2 parts of monopotassium phosphate. The nitriding modified charcoal adopted in the invention has a nitrogen nutrition function, and can reduce nitrogen leaching loss at the same time; through the mixing of the nitriding modified charcoal with the raw materials such as cow dung, pine needle and water-retaining agent, the substrate has the functions of water retention and ventilation, and meanwhile, the suitable carbon nitrogen ratio and comprehensive nutritional ingredients are more beneficial for rice seedling growth; the used raw materials are wide in source, low in price and easily available, and the product is low in cost and is beneficial for realizing ecological conversion utilization of wastes.

Description

technical field [0001] The invention relates to the technical field of soilless cultivation, in particular to a special carbon-based seedling raising substrate for rice and a preparation method thereof. Background technique [0002] Cultivating robust seedlings is an important link in the rice production process. Strong seedlings have a short period of turning green after transplanting and strong tillering ability, which can lay a good foundation for the high yield of rice in the later period. Traditional rice seedling cultivation is mostly carried out in seedling fields, which requires a certain area of ​​arable land and requires careful cultivation to make seedbeds. Field water management needs to be adjusted in time according to temperature changes. In addition, labor processes such as weeding and pest control are required, which often consume a lot of manpower and material resources. Moreover, it is difficult to cultivate strong seedlings due to changes in temperature ...

AI Technical Summary

Problems solved by technology

[0004] At present, a series of substrates for rice seedlings have been promoted and applied in production, mostly using peat, vermiculite, perlite, sludge, crushed straw, fungal residue, etc. as raw materials, formed through different proportions, and the nutrient content of these substrate materials Low, poor water retention and air permeability, which is not conducive to the development of rice roots; there are also some mixed matrix materials that use biochar as raw material and form a mixed matrix material by mixing with other substances, but the biochar has not been pretreated or modified, which often results in the pH of the matrix, High salinity is not suitable for seed development

In addition, biochar and nitrogen fertilizers are often not well combined, resulting in an imbalance in the carbon-nitrogen ratio, affecting the nutrient absorption of the seedling root system, inhibiting the growth of the seedlings, and easily forming thin and weak seedlings.

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