Liquid-storing temperature-regulated isolation method for raising rice seedlings with medium

Abstract

A liquid-storing temperature-regulated isolation method for raising rice seedlings with medium is characterized by including the steps of a, making a bed; b, setting trays; c, filling bottom liquid; d, spreading seedling medium; e, spraying nutrient solution; f, seeding and covering, namely covering with plastic film after leveling; g, supplementing water and nutrient solution; h, managing greenhouse temperature; and i, transplanting seedlings with 3 leaves and 1 shoot to 3.5 leaves or with four leaves and one shoot to 4.5 leaves. A liquid layer 10-20mm in depth under the medium is used as an isolation layer functioning well in preserving water and reducing water stress, so that roots are constantly kept in saturate moisture without excess drought, the roots close to the tray are prevented from staying in water often, and the roots can be enhanced. The medium layer is low in moisture variation amplitude and high in permeability and helps the roots breath oxygen to enhance absorbing capacity. The liquid layer can prevent early spring chill coming up underground, namely functioning as an insulation layer. The temperature of the position below the roots is higher than that of mulch, which is conducive to raising strong seedlings.

Description

technical field [0001] The invention relates to a method for raising seedlings of rice, in particular to a method for raising seedlings of rice with liquid storage, temperature regulation and isolation matrix. Background technique [0002] As my country's staple food crop, rice has a huge cultivation area. In recent years, the cultivation area in Heilongjiang Province, the main production area, has increased sharply, reaching 55.85 million mu in 2012. Along with this, the high-quality soil needed for rice seedling raising is also increasing day by day, and the collection of seedling-raising soil is becoming more and more difficult. At the same time, a large amount of high-quality upland soil or tree belt soil is used, which also causes damage to the environment. The soilless matrix seedling raising method has become the development direction of rice seedling raising in the future, and it can also lay the foundation for the realization of industrial seedling raising. At pres...

AI Technical Summary

Problems solved by technology

The above-mentioned method matrix seedling raising also has the restriction factors of the following aspects: the first matrix layer is only about 2cm, and the water retention capacity is very limited, and the seedlings are often in adversity of water shortage or water saturation, which is not conducive to cultivating strong seedlings; The number of times of watering is too high, the management is inconvenient, and the cost is increased at the same time; the third is that the root system of the seedlings is in a matrix of about 2 cm, and there is no communication with the groundwater. , and even the phenomenon of dead seedlings. There have been precedents of substrate seedling raising causing great losses to farmers. These factors need to be overcome urgently.