(1) Selection of plots: Select plots that are convenient for irrigation and drainage, field formation, and good water retention and fertility conservation. Leaky paddy fields, easy dry land, sandy soil, and vicious weeds are not suitable for heavy land masses.
(2) Treatment of rice fields: 1 Drainage: Drain the fields 1-2 days before spraying the herbicides in the early season, and drain the fields when the early rice is harvested in the late season. 2 Weeding: Early rice 10-15 days before the dumping, late rice was sprayed with herbicides on the evening after harvest in the early season to kill early rice straw and weeds. 3 Irrigation with water: Fields were sprayed with water for 2 to 3 days after spraying with herbicides. Early rice soaked in paddy fields for 7-10 days and late rice soaked in paddy fields for 2-4 days. 4 Leveling the fields: Before throwing, the footprints of the fields were too deep and uneven, and they were flattened by hand.
(3) Field Management:
1 Chemical weeding: Early rice is 5-7 days after throwing, and after 4-5 days of throwing rice, the middle and late rice will be uprooted, and the herbicides will be used in combination with fertilization. One of the following medicines can be used per acre, mixed with fine soil or chemical fertilizer after application: 1% gemcithin WP 7-10 g, 10% ND wettable powder 13-15 g, 1% Herbicide King wettability Powder 10-15 grams, 12% Cassia cream 100-120 ml, 200-250 ml of 50% herbicidal cream, 100-125 ml 96%, and 35-50 ml of 50% Ruifeite EC.
2 Moisture Management: After throwing, most of the seedlings are tilted or laid flat on the field surface. Roots are distributed on the soil surface and are sensitive to moisture. Therefore, irrigation should be shallow to avoid deep water effects. After 7 days, dry the water, spray the herbicide, fertilize the fertilizer, fill the 3 cm water layer on the 2nd day, keep it undrained for 3-4 days, and make up the water in time of lack of water. During the delivery period, 2 cm thin layer of water promotes the delivery of phlegm. No-tillage seedlings till the seedling stage is 2-3 days later than normal throwing japonica rice. When the number of seedlings per mu reaches 80% of the planned panicles (250,000 - 280,000), the field is sunny and the control of invalid tillering is promoted. Under the roots, strong and strong stalks were planted, and the percentage of tillers and spikes was increased. Young panicles were differentiated to maintain the shallow water layer at the flowering stage, intermittent irrigation was performed during the grain filling period, alternating between dry and wet, and the surface was kept moist. Water is cut off about 7 days before harvest.
3 Fertilization management: Fertilization in the field should be performed by soil testing and formula fertilization, so that organic fertilizer and inorganic fertilizer can be combined, and nitrogen, phosphorus, and potassium fertilizers can be combined. General organic fertilizer accounted for more than 30% of the total amount of fertilizer, and the ratio of N:P2O5:K2O was generally 1:0.5:1. The output of 600 kg per mu is generally 8-12 kg of pure nitrogen, 4-12 kg of phosphorus pentoxide and 1-2 kg of zinc sulfate. Fertilization method: 40% of total nitrogen (3.2-4.8 kg pure nitrogen), 40% (3.2-4.8 kg) of total potassium fertilizer, and total amount of phosphate fertilizer as base fertilizer (4-12 kg pure phosphorus). No-tillage seedlings were planted in the early stage and their growth was slow. The amount of fertilizer applied earlier increased. After 4-5 days after throwing, the application of manure was promoted, and 30% of the total nitrogen fertilizer and potash fertilizer were applied, about 2.4-3.6 kg of pure nitrogen and pure potassium. In the remaining leaf age about 1.5 grain fertilizer, with 30% of nitrogen fertilizer and 30% of total potassium, about 2.4-3.6 kg of pure nitrogen and pure potassium. After the full-heading stage, the leaf color of the seedlings is too light to be sprayed with foliar fertilizer. Each time, the application of 150 grams of potassium dihydrogen phosphate per acre and 50 grams of urea of ​​500 grams of water are sprayed to extend the functional leaves and photosynthetic capacity and increase the seed setting rate.
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