Preparation method and application of special microbial seedling-raising substrate of rice

Abstract

The invention discloses a preparation method and application of a special microbial seedling-raising substrate of rice. The substrate comprises the main ingredients: peat soil, vermiculite, biochar, rotten chicken manure, river sand, biocontrol bacteria and the like. The seedling-raising substrate has a particle size of 1-10 mm, a pH value of 6.8-7.3 and conductivity of 3.0-3.4 ms / cm, the spore content is 107 / g, and the control effect on rice blight and bakanae diseases can reach 65% or above in the rice seedling period. All the nutrients which are required for growth of rice seedlings can beprovided by the microbial seedling-raising substrate, irrigation of a nutrient solution is not needed any more, and meanwhile, occurrence of rice blight and bakanae diseases can be prevented effectively in the rice seedling period. The seedling-raising substrate can be applied to rice seedling raising through substrates.

Description

technical field [0001] The invention belongs to the technical field of agricultural production, and specifically relates to a microbial seedling-raising substrate with nutrition, air permeability, water retention and disease prevention, and is suitable for rice seedling raising. Background technique [0002] High-quality seedlings are the prerequisite for high-yield rice, and the substrate is the material basis for ensuring high-quality seedlings. In production, rice seedlings often grow slowly, or grow weakly, or die in pieces, or the formula is cumbersome, or the management is complicated. In response to these problems, we conducted a formula screening, focusing on several key points: 1. First, the substrate must have air permeability, that is, the requirement for the porosity of the substrate. Poor air permeability of the substrate will cause a decrease in the activity of aerobic microorganisms and strong water absorption. , resulting in compaction, the damage to the seed...

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Problems solved by technology

[0003] The rice planting area in Tianjin is about 400,000 mu, mainly concentrated in Baodi and Ninghe districts. At present, the seedling substrates are basically purchased from surrounding areas such as Jiangsu and Hebei. The quality of the substrates varies. High (20 yuan per bag, 50L), and the freight will be even higher. In addition to soaking the seeds with chemicals, chemical agents such as carbendazim, hymexazol, and metalaxyl must also be sprayed during the seedling raising process, which increases the use of cost, and we use local resources to develop our own seedling substrate, which combines nutrition and disease prevention, and the price is lower than products in Jiangsu and other places

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