What are the varieties of rice seeds? How to raise rice seedlings?

As we all know, rice is one of our staple foods. Rice is grown in the north and south of our country, but the choice of rice varieties is also different according to the environment and climate. Let's learn about rice varieties and seedling raising methods.

What are the excellent varieties of rice?

1. Songjing 22

Songjing 22 takes about 144 days from emergence to maturity in the adaptive area. The variety has 14 leaves on the main stem, long grain type, plant height of about 110 cm, ear length of about 20.3 cm, 104 grains per panicle and 1000-grain weight of about 27 grams. The roughness rate is 80.4% to 82.5%, the head rice rate is 63.0% to 69.5%, the rice quality is good, the taste quality is high, and it reaches the national second-class high-quality rice standard.

two。 Daohuaxiang No.2

Daohuaxiang No. 2 is evolved from the earliest five excellent rice varieties and is rich in Heilongjiang Province in Northeast China. Rice is characterized by long accumulated temperature, mature period of more than 128-148 days, plant height of about 105 cm, the biggest disadvantage is poor lodging resistance. It can be divided into internal fragrance type and external aroma type. The rice yield is about 60%, and the rice produced is soft and waxy, delicious, fragrant and well-known throughout the country.

3. Nanjing 46

Nanjing 46 generally has a yield of more than 600 kg per mu, and its high-yield cultivation can reach 700 kg. The plant height of this variety is about 110cm, the plant type is compact, the tillering ability is moderately strong, the panicle type is larger, the panicle length is about 15 cm, the total grains per panicle is 140-150 grains, the seed setting rate is more than 90%, and the 1000-grain weight is 25-26g. The whole growth period is about 165 days, and its outstanding advantage is the excellent quality of rice. The rate of head rice is 66.8%, and the rate of chalky grain is 20.0%, which reaches the second-class high-quality rice standard of the national standard. This variety of rice is crystal clear, soft, smooth, elastic, cold but not hard, and has excellent taste quality.

4. Yuenong silk seedling

Yuenong silk seedling is a conventional rice variety sensitive to temperature and late in both early and late use, with a total growth period of 128 days for early growth and 111 days for late growth. The plant type of this variety is compact, the plant height is moderate, the tillering ability is medium, the leaf color is green and the leaf posture is straight. The section height is 97.0-97.9cm, the ear length is 21.3cm-21.4cm, the effective ear per mu is 19.4-197000 ears, the total grains per panicle is 122124, the seed setting rate is 87.1-88.0%, and the 1000-grain weight is 22.0-22.6g. Its yield is high, with an average yield of about 430 kg per mu in the regional test. The lodging resistance is strong, the cold resistance is medium, the late ripening color is good, and the rice quality is excellent, which is the second grade of national standard and provincial standard.

2. Methods of raising rice seedlings

1. Seed treatment

Rice needs to be treated with seeds before raising seedlings, which can improve the germination rate of seeds and thus the emergence rate of rice seeds. First of all, it is necessary to sun up the seeds; then soak the seeds with Baike or Prochloraz and water for five or six minutes; then soak them with imidacloprid wettable powder for two days; finally, accelerate germination and wait for about 80% of the rice seeds to sprout white, then you can sow the seeds. This can not only improve the emergence rate of rice, but also improve the disease and insect resistance of rice.

two。 Water management

Water management during rice seedling raising is also very important. In general, the moisture of the seedling land does not need too much, it is generally able to soak the border surface, and the second is that when the moisture in the field is reduced, it should be watered properly and the humidity can be kept in the original position. The moisture in the rice seedling field should not be too much, otherwise it will affect the emergence of rice seedlings, but also cause diseases and insect pests, resulting in seedling death. If it is to raise seedlings in dry land, we should timely water the film, water the soil thoroughly, prevent the death of seedlings, and maintain a reasonable humidity in the seedling field during the period of emergence.

3. Fattening management

The fertilization management of rice seedlings can also be divided into two ways: dry field and paddy field. Generally speaking, when raising seedlings in dry land, the nutrients required are not very large. Generally speaking, under the condition of sufficient base fertilizer, there is no need to fertilize them in the later stage, so as to avoid burning seedlings due to excessive fertility, but if the bottom fertilizer is not properly treated, the leaves of the seedlings are yellowing, so timely fertilization is needed. When raising seedlings in paddy fields, the amount of fertilizer required is relatively large. When fertilizing, we usually apply fertilizer on the principle of frequently applying thin fertilizer to prevent the occurrence of burning seedlings and promote the growth of seedlings.

4. Pest control

In order to avoid the impact of diseases and insect pests on the growth of rice seedlings, it is generally best to apply 48% chlorpyrifos EC and 35% phoxim microencapsulated granules before sowing, with a dosage of 150 ml and 1 kg per mu respectively. After sowing, in order to prevent the harm of underground pests to rice seeds, we also need to sprinkle an appropriate amount of 40% phoxim EC around the seedling field. After the emergence of rice seedlings, we mainly want to avoid the harm of Rhizoctonia solanacearum, bacterial wilt and leaf-eating pests to the seedlings. We can use benzyl dichloride, bensulfuron-methyl dichloroquinolinic acid and imidacloprid wettable powder plus Shikeduke respectively.

To sum up, it is the introduction of rice varieties. If you have any better rice seedling raising experience you would like to share, you can leave a message to tell the editor.

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