A kind of machine-transplanted rice seedling raising method in dry land

Abstract

The invention relates to a dry land seedling raising method for machine-planted rice. The dry land seedling raising method for machine-planted rice comprises the following steps of seedbed soil preparation, seed soaking for germination acceleration, installation of a micro spraying irrigation system, sowing through discs and seedling management. The dry land seedling raising method for machine-planted rice has the advantages that the micro spraying irrigation method replaces a flooding method, a dry land seedling raising method replaces a wetting seedling raising method, some natural defects of the flooding wetting seedling raising method are overcome, the requirement for flatness of seedling plates is low, the phenomenon of 'seedling flotation' is avoided, the irrigation speed is high, the seedling plates are prevented from being muddy after being soaked in water for a long time, field operations like pesticide spraying are convenient, water is saved, a micro spraying belt is easy and convenient to install, use and detach and is easy to move and store, investment cost is low, the irrigation effect is good, the quality of seedlings is high, and the compatibility of a seedling mat and a rice transplanter is good.

Description

technical field [0001] The invention relates to a method for raising seedlings of machine-transplanted rice in dry land. Background technique [0002] Machine transplanting is one of the main technologies of rice production. The quality of seedlings is directly related to the quality of planting, the number of living trees and the quality of the population, and is the key link in determining the yield. Unlike hand-planted rice, machine-transplanted seedlings grow in seedling trays instead of directly on the seedbed. Due to the poor water retention performance of the seedling trays (especially for matrix seedlings), the dry seedling technology suitable for hand-planted rice is not suitable for machine-transplanted rice. Seedling raising is difficult to operate, so the machine-transplanted seedling raising generally adopts the mode of flood irrigation and moist seedling raising. [0003] Practice in recent years has shown that there are some obvious deficiencies in the wet se...

AI Technical Summary

Problems solved by technology

[0003] Practice in recent years has shown that there are some obvious deficiencies in the wet seedling raising technology of machine-transplanted rice with flood irrigation.

If the flatness of the seedling board is not enough, there will be different depths when watering, some places have flooded the seedlings, and some places have not yet been watered, and this problem is more prominent in large seedling fields, which will inevitably cause uneven growth of seedlings , or even no germination, rotten buds, dry seeds, etc., seriously affect the quality of seedlings; and high-standard seedling boards must go through cumbersome procedures such as "water leveling", "repeated leveling", and frequent uncovering when watering. Check, water management is difficult, labor-intensive and time-consuming; second, when using organic substrates to raise seedlings, it is easy to appear the phenomenon of "floating seedlings" where the seedling blanket floats out of the seedling tray

Since the seedling raising substrate is mostly made of agricultural organic waste, the bulk density is low, and if the water content is insufficient (flood irrigation), if the speed is too fast or the water level is too high, it will cause the seedlings to float out of the seedling tray, and the water level will drop Afterwards, it is easy to suffer from water shortage and drought; the third is that the speed of water supply is slow, the efficiency is low, and it is labor-intensive and time-consuming

Fourth, soaking in water for a long time makes the seedling boards muddy and sinking, which is unfavorable for field operations

Fifth, the consumption of water resources is large and the utilization rate is low

Although dry seedling raising methods such as industrial seedling raising and hard ground seedling raising have better seedling raising effects, they are expensive and difficult to implement on a large scale.

Images