Air-permeable and heat-insulating pepper seedling substrate and preparation method thereof

Abstract

The invention discloses an air-permeable and heat-insulating pepper seedling substrate and a preparation method thereof, and belongs to the technical field of pepper seedling substrates. The air-permeable and heat-insulating pepper seedling substrate comprises a base layer, a nutrition layer and a covering layer, the base layer is located below the nutrition layer, and the covering layer is located above the nutrition layer. The base layer is prepared from the following components in percentage by mass: 12%-45% of pepper branches and trunks, 50%-80% of filler and 5%-8% of wood flour. The base layer and the covering layer with large material particles are arranged as an upper layer and a lower layer of the nutrition layer, and air permeability of pepper seedlings buried in the nutrition layer is ensured; and the wood flour adhered to the surfaces of the coarse sand grains is arranged to improve the moisture retention and heat preservation of the base layer, and under the conditions of water shortage and cold, the tentacles at the roots of the pepper seedlings are stimulated to grow downwards, so that the survival rate of the pepper seedlings is increased.

Description

technical field [0001] The invention relates to the technical field of pepper seedling-raising substrates, in particular to a ventilative and heat-retaining pepper seedling-raising substrate and a preparation method thereof. Background technique [0002] After experiencing a large-scale snow disaster across the country in 2010, industrialized seedling cultivation has gradually been accepted by many people of insight in agriculture, which has also greatly promoted the research on the application of seedling substrates. The most commonly used substrate materials are peat, rock wool, vermiculite, perlite, bagasse, mushroom residue, gravel and ceramsite. After research, the seedling-raising substrate does not have universal applicability, because the nutrients required by different types of plants are not the same. The research on the pepper seedling-raising substrate found that the existing pepper seedling-raising substrate has the following problems: [0003] 1. The length of...

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Problems solved by technology

[0003] 1. The length of the root system of pepper plants is short, the root tentacles are developed, the water demand is large, and the water retention of the substrate is poor. It is difficult for pepper seedlings to survive in the absence of water;

[0004] 2. The nutrients planted in the early stage of pepper seedlings are not easy to absorb, resulting in withering and death of pepper seedlings after planting due to lack of nutrients;

[0005] 3. Poor porosity of the matrix, especially the subsoil of the field in the field planting, has a high solidity, which restricts the pepper plants to take root downwards, which is not conducive to the pepper seedlings;

[0006] 4. There are many types of nutrients required for the growth of pepper seedlings in the later stage, which cannot be replenished in time

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