Rice bran is rich in starch and crude protein, B vitamins and nutrients such as nitrogen, phosphorus, potassium, magnesium and calcium. After being degraded in water, the released nutrients become important nutrients for rice growth. In recent years, the role of rice bran in controlling rice weeds has become increasingly prominent. Studies have shown that rice bran undergoes a strong reduction reaction in water, consumes a large amount of oxygen in the water, releases carbon dioxide, thus hindering the development of roots of weeds and the germination of seeds; the lower organic acids produced can inhibit weed rooting and damage weeds. Heart leaves; the decomposition of rice bran reduces the transparency of field water and hinders the photosynthesis of weeds. Many factors have inhibited or hindered the growth and development of weeds, thus achieving a good weeding effect. Indica rice has also played a dual role in fertilizers and safety and environmental protection. To this end, Panjin Dingxiang Group has been through a series of explorations and experiments at the national organic rice base and successfully summed up the efficient and convenient practical technology for rice weeding and weed control to become an efficient rice paddy field. Main measures for weeding. 1. Selection of rice bran The rice bran used for organic rice crops is derived from rice bran produced by an organic rice processing plant. Since rice bran is light in weight and has a small particle size, it is easy to fly outdoors, and it is difficult to apply, so it should be processed into a convenient dosage form. The specific method is to use a conventional granulator to process the rice bran into round pellets with a diameter of 3-4 mm, which is convenient for transportation and convenient for manual application. 2. Application points After many tests, it has been proved that the effective amount in the field is 66 kg of rice bran per acre, which can achieve the best weeding effect. The application time was 7-10 days after transplanting and the seedlings returned to green to reduce the chance of weed germination. 3. The selection of rice varieties is due to the long-term effect of rice bran on the growth of rice, and it is easy to make lodging and disease-susceptible rice. Therefore, it is recommended to choose varieties that are resistant to lodging, disease resistance and earlier maturity. Seedlings should be of suitable age, robustness, and strong resistance to avoid negative impacts. 4. Effect of weeding The company had a total area of ​​4,000 mu of rice grazing grass. On July 20th, the effect of herbicide was investigated. The results showed that all the weeds, such as Valerian-grass-grass-grass-grass, sedge-herb, and rain-heavy-flower, had better control effects, which were more than 90%, and had a strong inhibitory effect on Spirogyra. On July 25, artificial grass was removed from the field once. After that, no weeding measures were taken. 5. Precautions The rice locust is mainly based on young weeds. Therefore, it is necessary to shorten the time for soil preparation, sedimentation, and transplanting on farm operations and apply pesticides promptly after returning green to reduce the chance of weeds germinating. The use of rice bran should maintain a water layer of 5-10 cm, the water layer lasts for more than 7 days, timely water supply in the absence of water. When no wind or wind below level 4 is selected, apply sprinkler to prevent people from entering the field. It can be seen that after rice bran is processed into granules, 66 kilograms per acre is evenly spread after the seedlings return to green, and the control effect on non-germinated and young weeds is significant, which is an ideal practical technology for weed control in organic rice production fields.
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