Latest Technical Methods Tutorial for Rice Seed Treatment

Rice seed treatment technology includes four steps: sun-drying seeds, saltwater seed selection, seed disinfection, and seed dressing with yield-increasing bacteria. The details are as follows.

Sun-drying seeds

Sun-drying seeds can enhance the water permeability and air permeability of seeds, increase the germination rate, make seeds germinate uniformly, and make seedlings robust. It also has a sterilizing and disease-preventing effect. Especially for seeds that are poorly matured and have become damp during storage, the effect of sun-drying is particularly obvious. Sun-drying method: choose a high-temperature sunny day from 9 a.m. to 4 p.m. and dry for 2-3 days. When sun-drying, spread the seeds thinly, turn them frequently, and dry them thoroughly so that the seeds receive light and heat evenly and the seed coat is prevented from being rubbed and damaged.

Saltwater seed selection

Saltwater seed selection is a simple and easy seed selection method. It can eliminate empty and shriveled grains, grass seeds, and other impurities, ensure that the seeds are plump, and lay a good foundation for uniform, complete, and strong seedlings. The specific method is: first boil salt in a pot to make concentrated saltwater, then mix it with clean water in another container to make saltwater with a specific gravity of 1.10-1.13 (if there is no hydrometer to measure the specific gravity, use one fresh egg and put it into the saltwater; if the egg floats on the water surface and exposes a piece of eggshell the size of a five-fen coin, the specific gravity of the saltwater is about 1.10-1.13). Put the seeds into the saltwater, stir thoroughly, remove the empty and shriveled grains, grass seeds, and other impurities floating on the water surface, then take out the sunken seeds and wash them twice with clean water. Every two or three selections, use an egg to measure the specific gravity again and adjust the saltwater concentration in time.

Seed disinfection

Rice diseases transmitted by seeds are mainly rice white-tip nematode disease and bakanae disease. The simple and effective way to prevent and control these two diseases is strict seed disinfection. The commonly used seed disinfection methods include the following:

1. Use one tube of Jinzhongling (2 milliliters), add 10 kilograms of water, soak 6-8 kilograms of seeds, and soak the seeds in the dark for 120 hours. This method has a control effect of more than 95% on both rice white-tip nematode disease and bakanae disease.

2. Use 98% padan technical powder diluted 6000 times with water, add 3% carbendazim solution and mix with Jiujiaohai alginate iodine, and soak the seeds for 72 hours. It has a good effect on preventing and controlling rice white-tip nematode disease and bakanae disease.

During seed disinfection, note the following: during the soaking process, stir once about every 6 hours so that the seeds above and below are evenly exposed to the medicine. After soaking the seeds with the medicinal solution, remove the seeds and soak them in clean water for half an hour, repeating twice, to prevent phytotoxicity.

Seed dressing with yield-increasing bacteria

Before sowing rice, dressing seeds with yield-increasing bacteria can strengthen seedlings and increase yield. The method is to mix one bag of yield-increasing bacteria (20 grams) with 20 jin of wet seeds before sowing rice, mix evenly, and then sow.