1. What should be added to the rice nutrient soil
The growing environment of rice seedlings needs ventilation and water permeability, so a certain amount of river sand or fine sand can be added, which is more conducive to The substrate nutrient soil provides a good water, fertilizer, air and heat environment for the root system of the seedlings. The production method of rice nutrient soil is to add 0.5 kg of 45% ternary compound fertilizer per 100 kg of soil, or 1 kg of ternary compound fertilizer with a content of 25%, or add 100 grams of urea, 80 grams of potassium potassium, calcium Magnesium phosphate fertilizer 400 grams, it is best to spray the water evenly on the nutrient soil and dry it for later use. Before use, use 50 grams of Dixon for every 100 kilograms of nutrient soil, spray 8 kilograms of water evenly, and then dry it for disinfection. The farmyard manure should be well-rotted and finely broken manure, not kang soil, small ash and human excrement. The production method of rice nutrient soil The ratio of soil to manure is 3:1, and it is nutrient soil after being fully mixed. Before sowing, add 0.5 kg of ammonium sulfate, 1.0 kg of superphosphate, and 0.5 kg of potassium sulfate per 500 kg of soil. If there is no superphosphate, three-material phosphate fertilizer or diammonium phosphate can be added. Ammonium sulfate may not be added when diammonium phosphate is added.
Second, the preparation method and steps of rice nutrient soil
The preparation method of rice nutrient soil should take fertile topsoil, not raw soil and Barren soil; cultivating strong seedlings is the basis for high yield of rice, and nutrient soil is the basis for cultivating strong seedlings. It is suggested that farmers and friends should use the slack time to prepare nutritious soil for rice seedlings. As the saying goes, “the soil is rich and the seedlings are prosperous, and the seedlings are good for half a year”, which shows the importance of fertile soil for rice seedlings.
When taking dry field soil, it is necessary to know whether the dry field chemical herbicide with a long residual effect has been used in the previous year to avoid phytotoxicity; nutrient soil is with the in-depth development of rice production, and people grow according to the rice seedling stage. The special soil for seedlings prepared with regularity and nutritional characteristics can ensure that the seedlings can fully and continuously absorb the required nutrients from the soil during the growth period, which plays a very important role in cultivating strong seedlings.
When borrowing soil from paddy fields, it should be scattered and not concentrated in one place; the requirements for soil are: garden soil, vegetable soil, and dry soil are the best, and the topsoil of paddy fields is also acceptable. The production method of rice nutritious soil generally requires guest soil with good structure, complete nutrients, high organic matter content, no grass seeds, no pests and diseases, and no salinity; vegetable garden soil that has grown vegetables for many years, as long as it has high fertility and few weeds, it can be used for nutrition. When soil, do not add fertilizer. The method of stacking soil, fertilizer and grass in layers and fermenting at high temperature, that is, according to the amount of nutritious soil required for seedling raising, in a relatively flat, high and dry site, put a layer of soil, a layer of finely chopped straw, and a layer of livestock. Poultry manure (with appropriate addition of superphosphate) is piled up layer by layer, then watered to make the soil moist, the top layer is covered with soil, and then covered with plastic film for high temperature fermentation. After a few days, when the temperature in the heap reaches above 100 ℃, the heap is poured, and then the film is fermented, and then poured and sieved. Cultivated nutrient soil, or bag storage or pile up storage in situ, but to prevent rain erosion. The nutrient soil prepared by this method has no soil-borne diseases, insects and weeds due to the high temperature fermentation process. It is safe and hygienic, has high fertility, loose soil and good permeability.
