Causes and Control measures of rotten Rice seed

Rice is one of the most widely planted food crops, but some farmers have found the phenomenon of rotten seed in the process of raising seedlings. The so-called rotten seed means that the grain is rotten before or as soon as it germinates, and the hull often turns dark brown. This phenomenon seriously affects the yield of rice and causes a lot of economic losses to farmers. So what is the cause of rotten rice seed? How to prevent and cure it? Come and have a look with the editor.

I. causes of rotten rice seeds

There are many reasons for rotten rice seeds, including seeds themselves, diseases and insect pests and improper management. First of all, if the seed is not stored properly and the seed is not exposed to the sun, its germinating power will be impaired, causing it to sprout smoothly, resulting in rotten seed; when soaking the seed, the water is not changed frequently, or the seed is disinfected properly, which weakens the vigor of the plant in accelerating germination. it will also lead to rotten seeds; improper temperature control in the process of accelerating germination leads to high temperature burning seedlings, and the possibility of seeds emerging after sowing is very low, only rotten in the field. In addition, if the fertilization in the seedling field is too thick, the thick fertilizer will burn the seeds and cause rotten seeds; or the mud in the seedling fields is too rotten, and the grain seeds will sink and suffocate, resulting in rotten seeds.

II. Prevention and control measures

1. Seed germination test

Before sowing rice, it is randomly sampled from the upper, middle and lower layers of the seed pile, and after it is fully mixed, it is divided into three parts on average to do germination test. When the germination rate reaches more than 80%, it can be used as seed for production, otherwise it is not suitable for seed sowing.

2. Seed drying

The plants with a germination rate of more than 80% were exposed to the sun for 2-3 days, sterilized and disinfested by the sun, emitted carbon dioxide and moisture at the same time, and enhanced the air permeability and water absorption of the seeds, promoting the activation of enzymes, so as to improve the germination rate and germination potential, so as to achieve neat and consistent emergence.

3. Seed selection

Seed selection should remove the chaff and leave full, so that the seeds germinate neatly and the seedlings are strong. First, soak the seeds in 2-3 times the weight of water, plus an appropriate amount of salt, and select full seeds to sow after soaking.

4. Soaking seeds with medicament

After washing the selected seeds with clean water, soak them with dichlorvos and carbendazim for 3 days, but pay attention to the dosage and concentration of the agents to avoid using too many drugs and some of them will germinate. Insufficient drug dosage or insufficient seed soaking time had no obvious effect on the control of rice dry tip nematode disease and rice evil seedling disease.

5. Sprouting

After disinfection, the seeds have absorbed enough water, and then they are removed and put into a breathable bag to promote germination, while constantly watering warm water and turning frequently to avoid burning seedlings at high temperature. When more than 80% of the seeds are white, they can be sown.

6. Fertilization

One month before sowing, the rice seedling field should be ploughed, and then 2000-3000 kg of rotten organic fertilizer should be applied per mu as base fertilizer, and the soil should be broken and prepared, and the soil moisture should be raked finely and leveled. 35 kg of N, P and K compound fertilizer can be applied per mu before sowing. Immature farm manure can not be applied, at the same time, we should also pay attention to the application of seed fertilizer to avoid sprouting when the surface fertilizer is too thick, and try not to come into contact with the grain.

The above is the introduction of the causes and control measures of rotten rice seeds. I hope I can help you. If you want to know more about it, please follow us.