Weed control formula for direct seeding upland rice

Upland rice refers to the selection of high-quality rice varieties with strong drought tolerance and dry direct seeding under the condition of dry field. The whole growth period is dominated by natural rainfall. In addition, planting weeding in the whole process is also the key. Here is the editor to share the herbicidal formula for direct seeding upland rice.

1. Weeding formula for direct seeding upland rice

Closed soil: with 60% butachlor 250ml per mu, 48% Zhongbuchlor 400ml 50% barnyard king 50g + dimethyltetrachlorosodium 50g 33% field supplement 100ml mixed with water 75kg, spraying soil 7-10 days after sowing; stem and leaf treatment: 50% butachlor 250ml 50% barnyardine king 25g + Shikuodan 50ml mixed with water 40kg per mu, sprayed on barnyardgrass 2 leaves.

2. Cultivation techniques of direct seeding upland rice

1. Variety

Production should be selected through the national or provincial examination and approval, and by the breeding, propagation and promotion of integrated management of varieties. For example, the varieties examined by the State are Zhonghan 297 and Luhan No. 1, and the varieties approved in Anhui Province are Handao 906 and Xinliangyou 212.

2. Live broadcast

Upland rice is also called drought-resistant rice. Unlike "rice" grown in paddy fields, upland rice does not need water layer all its life, and is usually fed by rain after direct seeding in dry land or dry fields, or on this basis, appropriate supplementary irrigation. However, upland rice is not wheat and corn, and irrigation conditions must be provided in the special critical period, otherwise it will have a great impact on the yield. Although the requirements of light and temperature for the growth of upland rice are similar to those of rice, the lifetime water requirement of upland rice is about 2 to 3 or less than that of rice.

3. Soil

In Anhui Province, upland rice is most suitable for planting in low-lying and waterlogged dryland and water-deficient paddy fields, as well as in mountainous areas where Rain Water is more, hills and drylands that can be watered.

4. Sowing seeds

From the middle of May to the middle of June, the rice seeds should be exposed to the sun for 2 days before sowing, and mechanical strip sowing or artificial hole sowing should be used. The amount of rice seeds per mu is 3 kilograms (low seed amount for sandy soil and high seed amount for clay), and the sowing depth is 2 color 4 cm. If there is no effective precipitation in the weather forecast at this time, the first permeable water should be irrigated in time to strive for early seedling, uniform seedling and whole seedling. The field inspection was carried out at the seedling 3-Mel 4-leaf stage. If there is a phenomenon of missing seedlings and broken ridges, it can be dense and thinned.

4. Fertilization

Base fertilizer: before ploughing, 20-30 kg of ternary compound fertilizer; seed fertilizer: 15 kg of ternary compound fertilizer and 10 kg of urea before sowing; topdressing of seedlings at 4 leaf stage, 8 to 10 kg of urea per mu and 5 to 10 kg of potash fertilizer; 10 kg of urea per mu about 60 days after sowing, and 70 to 100 ml of plant nutrient solution during filling period.

5. Watering

If the weather is favorable, upland rice should not be watered during the whole growth period. However, if there is no effective precipitation for a long time and the farmland is dry, there is "three times of water", that is, the whole seedling water, booting water and heading filling water after sowing.

6. Control of diseases and insect pests

(1) Prevention and control of mole cricket: combine base fertilizer with phoxim granule 30kg per hectare to prevent mole cricket from eating seeds, arch soil ventilation and dead seedlings.

(2) Control of rice blast: Fuji No. 1 can be used to control rice blast in the early stage of rice blast and heading stage for 2-3 days.

The control of dry rice field grass is the control of other weeds dominated by paspalum grass, which should be based on the principle of "scientific drug use, early prevention and early treatment".