Preparation method of rice disease-resistant seedling-cultivation substrate

Abstract

A preparation method of a rice disease-resistant seedling-cultivation substrate includes the following steps of firstly, taking field soil and rice straw as the main raw materials, smashing field soil, and continuously drying smashed field soil at a temperature of 85-95 DEG C for 10-14 minutes; secondly, collecting harvested rice straw, cutting the straw into segments 2-3 cm long, and spraying water on the cut straw segments according to the rule that 1.5-1.8 kg of water is sprayed on every 10 kg of rice straw; thirdly, sending the wet rice straw segments into a tumbling machine to be tumbled, and vacuumizing once every 9-10 minutes during tumbling; fourthly, sending the tumbled rice straw into a drying device to be continuously dried for 30-50 minutes at a temperature of 45-55 DEG C; fifthly, smashing the dried rice straw to prepare straw meal, mixing the straw meal with field soil in the first step according to the weight ratio of 1:(3-5), screening the mixture by means of a screen of 80-100 meshes, and putting mixed powder into a stainless steel container, adding water for dilution, pumping the material into a centrifugal type spray drying tower to be dried, and granulating the dried material to obtain the rice seedling-cultivation substrate.

Description

technical field [0001] The invention relates to the technical field of fertilizers, in particular to a method for preparing a rice disease-resistant seedling-raising substrate. Background technique [0002] Since the 1980s, rice dry-raised sparse planting cultivation technology has been widely used in my country through introduction, experimentation and demonstration. With the great leap forward, rice production has developed rapidly, presenting a gratifying situation today, with large planting area, high per unit yield level, the total output ranks first in grain output, and remarkable economic benefits. [0003] The essence of dry rice seedling sparse planting and transplanting technology is: use fertile and loose dry field soil, and in the dry environment of the seedbed, cultivate strong and developed root system, short and thick stems and leaves, and low tiller seedlings, and transplant them to paddy fields After the environment, it will burst into roots and turn green q...

AI Technical Summary

Problems solved by technology

When the drought seedlings were first raised in the countryside, the farming was done according to the technical requirements. The seedlings cultivated were of good quality, turned green quickly, had many tillers, high yields, and were disease-free and disaster-free. Farmers have personally experienced this. It is very difficult to handle topsoil, decomposed farmyard manure and peat. There are few livestock and poultry, and low-lying floodplains, meadows, and grass ponds where peat can be dug have all developed into paddy fields. Most of the dry fields with water sources They have also been converted into paddy fields, and it takes 2m per hectare to grow seedlings per year 3 Seedling soil has been excavated for many years. All the dikes in the paddy field area and the resources of wasteland have been exhausted. Knowing that the current seedling soil is far from the purpose of dry breeding technology, there is really no way. The loess, beside the roadbed, and under the ditch, as long as it is dry and can be sieved into fine soil, it can be used as seedling bed soil. If it is not fertile, it will be supplemented with chemical fertilizers. The roots are long and diseased, the survival rate is low after transplanting, the greening is slow, and the tillering is late. It is not at all to achieve high and stable yields with high-quality seedlings, but to press the yield on chemical fertilizers and weather. When the year is good, the yield can be maintained, and there is a slight disaster. Rice farmers are miserable. If there is a spring flood year, there will be water everywhere and nowhere to collect soil, and there will be no way to do anything about agricultural production, which will delay the farming time.