Soilless seedling raising method of paddy rice

Abstract

The invention relates to a soilless seedling raising method of paddy rice. The traditional soilless raising seedling technology of the paddy rice is immature, which results in phenomena that the quality of seedlings is poor, the seedlings do not grow, roots do not twist, some place is not suitable for transplanting seedlings, and the seedling death usually happens. The invention comprises steps of (1) proportioning substrates: taking and uniformly mixing 1-3 jin of pearlite powder, 1-5 jin of grass carbon, 1-5 jin of fermented plant straw powder, 1-5 jin of fermented livestock feces and 20 grams of slow-release fertilizer; (2) adding a moisture preserving agent and an adhesive into the prepared substrates; (3) sowing seeds; and (4) scattering 0.5 to 0.8 cm of burnt coal ash on paper with air vents in step (3), adjusting pH value of the burnt coal ash to 4.5 to 5.5, watering the coal ash, and covering the coal ash with a moisture preserving land layer, applying a liquid fertilizer to seedlings 8 to 12 days later after the seedling growth, applying the liquid fertilizer to the seedlings again 8 to 12 days later, and carrying out regular seedling management, wherein a non-woven ventilation film is adopted as the moisture preserving land layer , and the fertilizing amount of each time is 15 to 25 g / m<2>. The method in the invention can be used for raising paddy rice seedlings.

Description

Technical field: [0001] The invention relates to a method for cultivating rice seedlings without soil. Background technique: [0002] Soilless rice seedling cultivation has a history of more than ten years. In northern China, rock wool, rice husk, vitrified microbeads (closed cells) and perlite (open cells) are more representative. The rock wool seedling raising technology has not been further developed due to the constraints of harm to the human body and pollution to the environment, and the rice husk seedling raising has not been greatly improved due to the complicated technology of fermenting rice husk and the frequent occurrence of seedling diseases caused by the contamination of bacteria. Widening the range, vitrified microbeads (also called perlite, puffed sand) have many unfavorable factors for single perlite seedling cultivation, because perlite’s permeability and conductivity are too strong, it is very sensitive to temperature response, and it gets hotter when heate...

AI Technical Summary

Problems solved by technology

The rock wool seedling raising technology has not been further developed due to the constraints of harm to the human body and environmental pollution. Rice husk seedling raising has not been greatly improved due to the complexity of fermenting rice husk technology and the frequent occurrence of seedling diseases caused by bacterial contamination. Widening the range, vitrified microbeads (also called perlite, puffed sand) have many unfavorable factors for single perlite seedling cultivation, because perlite’s permeability and conductivity are too strong, it is very sensitive to temperature response, and it gets hotter when heated. It is colder when it is colder, which leads to poor quality of seedlings, no seedlings, no roots, and some places cannot be transplanted, and the phenomenon of dead seedlings often occurs, which is not accepted by the common people.