How to raise seedlings? Introduction of 5 seedling raising methods

Seedling raising can be carried out by water seedling raising method, wet seedling raising method, dry seedling raising method, two-stage seedling raising method and plastic soft disk seedling raising method, which can be carried out according to sowing time, planting variety, sowing amount, water and fertilizer conditions, planting area, climate, etc., to choose a suitable sowing method to raise seedlings.

I. the method of raising seedlings by water

The main results are as follows: 1. Water seedling raising is the traditional way of raising rice seedlings in our country, which is seldom used now. First of all, the seeds with strong vitality and strong germination potential should be selected for raising rice seedlings. In order to improve the germination rate and mature seedling rate of seeds, the seeds can be dried properly.

2. Raising seedlings mainly through flooding management, the water layer has the function of preventing weeds, heat preservation and cold protection, easy to pull seedlings, less injured seedlings, flooding in saline-alkali land, has a certain role of salt prevention and protection of seedlings, such as flooding for a long time, the soil will be anoxic, resulting in the growth of seedlings, affecting the root of seedlings, resulting in poor quality of seedlings.

2. Moist seedling raising method

The main results are as follows: 1. The wet seedling raising method is easy to adjust the contradiction of water and air in the soil. After sowing, the seedling emergence is relatively fast, the seedling emergence is neat, and the probability of physiological blight is relatively small. This seedling raising method is beneficial to promote seedling emergence and root, and avoid rotten bud and dead seedling.

2. The seedling raising method is between water seedling raising and dry seedling raising, and water management can be used to promote and control seedling growth, so as to replace the traditional seedling raising method.

3. When sowing in early spring, the method of wetting and heat preservation of plastic film is usually used to prevent cold injury of low temperature. on the basis of moist seedling raising, a film is covered on the surface of the box after sowing, which is usually covered by a low arch frame. this is conducive to heat preservation, moisturizing and warming, and in order to prevent rotten buds and rotten seedlings, they can be sowed early in time, so as to improve the rate of mature seedlings.

III. The method of dry nursery

The main results are as follows: 1. The water layer is not maintained in the process of raising seedlings in drought, but only the soil is kept moist, which is often suitable for double-cropping early rice and cold areas.

2. The seedling bed of dry seedling raising is relatively fertile and loose, and paper tube or plastic floppy disk can be used to raise seedling. The sowing time of this method is not affected by water source, and it is convenient to operate. It is suitable for cultivating large, medium and small seedlings. The seedling raising method has a long seedling age and does not string roots. It has a wide range of application.

3. Open and closed type film dry raising seedlings: the arch shed is built with iron wire or bamboo sheets, the bed width is about 1.5m, the middle height is about 25-35cm, one is inserted every 50cm, and then covered with plastic film on both sides, and finally overlap about 20-30cm at the top of the arch shed. If the ventilation can be opened from the top, this method is more convenient to operate, labor-saving, convenient for later management, and is conducive to the neat growth of seedlings. Improve the seedling rate.

Fourth, two-stage seedling raising method

The main results are as follows: 1. The process of raising seedlings is divided into two stages. At first, the small seedlings with 3-4 leaves are cultivated by closely sowing dry seedlings, and then planted according to a certain density in the field of ploughing and raking fertilization. after being cultivated into strong seedlings with multiple tillers, they can be transplanted to the field.

2. This method is more suitable for late planting middle rice in wheat stubble and double cropping late rice. It has the advantages of less seed amount, strong early onset, high seedling rate, and can adjust the contradiction of stubble.

5. Plastic floppy disk seedling raising method

The main results are as follows: 1. The seedlings bred by this method can not only carry out manual cutting, but also throw seeds, which is beneficial to reduce the cost of raising seedlings, facilitate management, low incidence rate at seedling stage, increase the proportion of seedling fields and have high seedling resistance.

2. Calcium-plastic floppy disk is usually used to raise seedlings, which is about 58cm in length, about 28cm in width and 2.6-2.8cm in depth, and then loaded into nutritious soil and watered and sown. Generally artificial transplanting rice seedlings, each plate sowing amount is about 70-80 grams, mechanical transplanting rice seedlings, each plate sowing rate is about 100 grams, other seedling raising methods are similar to open and closed dry seedlings.