Method of raising seedlings of early rice in Jianghuai region along rivers for preventing and reducing disaster

Abstract

The invention discloses a method of raising seedlings of early rice in Jianghuai region along rivers for preventing and reducing a disaster, which comprises the following steps of: preparing a seedbedand building a shed, performing seed treatment, determining the seeding amount, seeding in a suitable period of March 20-25, when the daily temperature is above 10 DEG C stably, performing seeding inbatches and in different periods in a warming period, mechanically sowing blanket seedlings by adopting an assembly line mode, sleeving soft disks with hard disks for sowing, and wetting and culturing the throwing-transplanting seedlings by adopting the soft disks; placing the soft disks into the seedbed, managing drought, carrying out chemical control and pest control. According to the seedlingraising method, protection seedling raising is carried out by adopting a facility greenhouse and a covering film, so that the ground temperature and the air temperature are improved, and the requirement on the minimum temperature for safe growth of the seedlings is met; proper soil moisture is kept, the humidity of soil and air in the shed is kept at about 85%, which is suitable for the growth ofthe seedlings; through standard preparation of nutrient soil for seedling raising, scientific seed treatment and standard seedbed management, strong seedlings of proper age can be cultivated: the seedling age is 20-25 days, the seedling height is 15-18 cm, the white roots are 13-15, the green leaves are 3.5-4.1 leaves and the roots of the disk are connected with a blanket sheet, and no or few leakages happen when being planted on a machine, namely, the leakage rate is 0-5%.

Description

technical field [0001] The invention relates to the technical field of crop cultivation, in particular to a method for raising seedlings of early rice for disaster prevention and mitigation in the areas along the Yangtze and Huaihe Rivers. Background technique [0002] The distribution area of ​​rice planting in China is mainly in the south, and rice production is increasingly concentrated in advantageous areas. In recent years, my country's rice production has gradually concentrated in the middle and lower reaches of the Yangtze River and Heilongjiang rice production areas. At present, the southern rice area accounts for about 94% of my country's rice planting area , The area of ​​rice in the Yangtze River Basin has accounted for 65.7% of the country, of which early rice is produced in 13 provinces (regions), and the sown area is relatively large. In the area along the Jianghuai River, the average daily temperature is 11.5-14.5°C from mid-to-late March to early-to-mid-April,...

AI Technical Summary

Problems solved by technology

However, these methods also exposed many problems, especially in the areas along the Yangtze River and Huaihe River, the growth of rice seedlings is slow, the seedbed period is too long, and the seedlings are prone to disease; the seedling breeding cycle is long, and it is greatly affected by the climate environment

Due to the long seedling cycle and the frequent exposure to low temperature and cold damage, the incidence of rice seedlings is high, and diseases such as blight often break out in a large area, causing a large number of seedlings to die, which not only causes economic losses for seedlings, but also brings difficulties for later machine transplanting.

Therefore, when raising seedlings, it is often necessary to mix a large amount of chemical agents into the seedbed soil. At the same time, the rice seedling period is long, and the seedlings go through the "weaning period", requiring continuous fertilization, which greatly increases the material and labor costs of seedling raising.