The nursery substrate is commonly known as nutrient soil. Whether it is planting Vegetables or flower seedlings, the nursery substrate is a key factor in producing high quality products. Its fundamental role is to replace the soil, but its nutrient is much richer than the soil, better permeability, and adapt to the growth and development of seedlings. Physiological needs. In this way, seedlings can adapt to the environment better and grow faster. When selecting nursery substrates or self-made nutritious soils, the following criteria should be followed:
1. From the perspective of ecological environment. It is required that the seedling substrate is basically free of living germs and eggs and contain no or as few harmful substances as possible to prevent it from entering the growing field when transplanted with the seedlings and polluting the environment and the food chain. In order to meet this standard, in the self-produced substrate nutrient soil can be added to the fermentation of selected raw materials for rapid fermentation, in order to achieve the purpose of sterilization and removal of eggs.
2. The nursery substrate should be similar to the transplanted soil environment. In terms of nutritional conditions and growth environment, the nursery substrate is more conducive to plant growth than soil. However, it still needs to have other functions of the soil, such as facilitating root winding and better water retention.
3. The nursery substrate is preferably formulated with organic and inorganic compound fertilizer substrates. In the fermentation of raw materials using the starter, the organic matrix and the inorganic matrix should be scientifically matched according to the requirements of different seedling varieties, and the ventilation, moisture, temperature and nutritional status of the seedling substrate should be well adjusted.
4. Try to use light sources with abundant local resources and low prices. In the application of plug seedlings technology, how to choose the seedling substrate or fermentation raw material is related to the primary issue of the cost of nursery and the quality of nursery. Under normal circumstances, it is necessary to fully tap and use local convenience conditions, select light matrix resources suitable for plug seedlings, and reduce the cost of seedling substrate, thereby reducing the price of plug seedlings and increasing their market competitiveness. According to the actual situation in various places, carbonized rice husks, cottonseed hulls, wheat hulls, sawdust, vermiculite, perlite and other inexpensive substrates are generally used as the substrate for plug seedlings.
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