Rice dedicated carbon matrix seedling substrate and preparation method thereof

A seedling-raising substrate and carbon-based technology, applied in the direction of application, fertilizer mixture, fertilization device, etc., can solve the problems affecting the nutrient absorption of seedling root system, unfavorable rice root system development, carbon-nitrogen ratio imbalance, etc., to achieve the ecological transformation and utilization of waste, The effect of reducing nitrogen leaching loss and low production cost

Active Publication Date: 2015-09-09
AGRO ENVIRONMENTAL PROTECTION INST OF MIN OF AGRI
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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  • Rice dedicated carbon matrix seedling substrate and preparation method thereof

Examples

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Embodiment 1

[0027] Embodiment 1: a kind of preparation method of rice-specific carbon-based seedling-raising substrate, comprises the following steps:

[0028] (1) After the rice husk is air-dried, put it into a retort carbonization furnace. The carbonization furnace starts at 40°C, raises the temperature to 170°C at a rate of 5°C / min, keeps it for 30 minutes, and then raises the temperature to 300°C at a rate of 5°C / min. Keep for 3 hours, then cool to room temperature, soak in water for 9 hours, rinse twice with water, dry in an oven at 105°C, and grind through a 2mm sieve to prepare biochar particles for use.

[0029] (2) Add 2mol / L H to the biochar obtained in step (1) 2 o 2 , stand for oxidation for 48 hours, filter the solution, and dry to obtain oxidized biochar.

[0030] (3) The H obtained in step (2) 2 o 2 The oxidized biochar was added to the ammonium carbonate solution with a nitrogen content of 25% at a solid-to-liquid ratio of 1:9, and placed in a constant temperature osci...

Embodiment 2

[0035]Example 2: A method for preparing a special charcoal-based seedling-raising substrate for rice, the difference from Example 1 is that step (7): take 40 parts of nitrogenated modified biochar obtained in step (3), air-dried cow dung 38 parts, 10 parts of pine needles, 8 parts of vermiculite, 3 parts of water-retaining agent obtained in step (4), and 1 part of potassium dihydrogen phosphate as raw materials, and after uniform mixing, a special carbon-based seedling raising substrate for rice is obtained.

Embodiment 3

[0036] Example 3: A method for preparing a special charcoal-based seedling-raising substrate for rice, the difference from Example 1 is that step (7): take 35 parts of nitrogenated modified biochar obtained in step (3), air-dried cow dung 40 parts, 10 parts of pine needles, 8 parts of vermiculite, 5 parts of the water-retaining agent obtained in step (4), and 2 parts of potassium dihydrogen phosphate are used as raw materials. After uniform mixing, a special carbon-based seedling raising substrate for rice is obtained.

[0037] Unless otherwise specified, the instruments and equipment involved in the above examples are conventional instruments and equipment; the involved industrial raw materials are commercially available conventional industrial raw materials unless otherwise specified.

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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 ...

Claims

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Application Information

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IPC IPC(8): C05G3/06C05G3/70
Inventor 张贵龙赖欣李洁修伟明杨殿林
Owner AGRO ENVIRONMENTAL PROTECTION INST OF MIN OF AGRI
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