Micro-spraying irrigation dry seedling raising method for mechanically-transplanted rice

Abstract

The invention relates to a micro-spraying irrigation dry seedling raising method for mechanically-transplanted rice. The micro-spraying irrigation dry seedling raising method includes steps of a, preparing soil of seedbeds; b, installing micro-spraying irrigation systems, and in other words, installing head pivots, water transport and distribution pipe networks and soil insertion rotary micro-spraying nozzles on rice fields; c, soaking seeds and accelerating germination; d, arranging the seeds in discs and sowing the seeds; e, managing seedlings at seedling stages. The micro-spraying irrigation dry seedling raising method has the advantages that the shortcoming of excessively high requirements of flood-irrigation wet seedling raising on the flatness of seedling plates can be overcome; the shortcoming of 'floating seedlings' of flood-irrigation wet seedling raising can be overcome; the irrigation speeds are high, and a low-quantity repeated-irrigation mode can be adopted; a water-saving irrigation technology is implemented in micro-spraying irrigation, accordingly, the water resource utilization rate is high, and wastage is low; the micro-spraying irrigation systems can be installed, used and detached easily and conveniently and are low in investment cost; a good irrigation effect can be realized, the seedlings can emerge safely, are high in quality and good in uniformity and have robust, voluminous and compact root systems, and seedling carpets and transplanters are high in compatibility.

Description

technical field [0001] The invention relates to a dry seedling raising method for machine-transplanted rice with micro-spray irrigation. 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 deficienci...

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 already flooded the seedlings, and some places have not yet received water. 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., which 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 floating seedling phenomenon that 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 time-consuming; the fourth is that long-term soaking in water makes the seedling boards muddy and sinking, which is not conducive to 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