High-yielding Cultivation Practices for Direct-seeding Rice
Live rice broadcasting is a provincial, cost-effective, and efficient rice cultivation technique. Our district has been demonstrating and planting for four years. This technology can not only reduce the labor intensity, but also reduce the production cost. Our district will vigorously promote this year. Now we have proposed the following points for local reference on the rice direct-seeding operation technology and high-yield cultivation. I. Variety selection Japonica rice, japonica rice or japonica rice can all be broadcast live. Considering high yield and economic considerations, it is more appropriate to use medium grain japonica rice or early maturing late japonica rice with large grain and ear weight. Second, pre-broadcast preparation 1, seed preparation A, before sowing for drying and selection, remove the rice seed on the branches and grass species. B. Use 100 grams soaking to prevent bachelor disease. Water live: Seeds can be sowed after soaking. Live broadcast: only soaking does not germinate, can also be directly seeded after dry seed coating. 2. Daejeon prepares for cultivating sorghum and cultivating the sorghum. Live water: Shiji basal fertilizer, the Sheung Shui machine is spinning, and the squall is leveled. The day before sowing, the water in the fields is drained. Live drought: Spreading base fertilizers, machines are broken. The requirements of the whole field are as follows: The field is flat and there are few debris. Third, the appropriate sowing 1, broadcast volume: 4-6 kilograms of dry seed sowing, water, take the lower limit, the upper limit of live broadcast rice; sowing date early take the lower limit, the sowing date late take the upper limit. 2. Sowing date: sowing date should not be too late, early-maturing and late-mowing should be sowed before June 8th, and the late-maturity Chinese halberd should finish broadcasting before June 15. 3, sowing requirements: According to the pod species, even valley, anti-replay, missing broadcast. 4. Sangou Package: After planting, a set of ditch inside and outside the field should be opened. Before the dive, it is necessary to carry out the machine rotation and cover planting. 5, prevention and treatment of rodent harm, bird damage. IV. Post-broadcasting management 1. Water slurry management A. Pre-water live broadcasting: Wet fields are kept before standing seedlings, and shallow water layers below 2 cm above 1.5-2 leaf stage are used for chemical weeding. Drought live: Immediately after sowing, drip irrigation water, be sure to make the whole surface of the soil moist, 1-3 days after sowing dampness to seal in addition. The field was kept moist before 2 leaves of the seedlings and shallow water after the 3 leaf stage. Seedlings in the 4 leaf stage of seedlings were transplanted and thinly packed to ensure uniformity throughout the field. B. In the middle and late periods, dry and wet alternately and moist mainly, reach the ear-stage of seedlings (general hybrid rice, japonica rice saplings and seedlings will reach 150,000 and 200,000 respectively) and be put on the field in a timely manner, from light to heavy, divided into fields, Control the peak seedlings, establish a shallow water layer during the booting stage, dry and wet after heading, and not water prematurely before harvesting. 2. Fertilizer operation principle: the reasonable ratio of nitrogen, phosphorus, and potassium is 1:0.5:0.5; the pure nitrogen content of Mushi is 16-20 kilograms (minimum limit for hybrid rice, upper limit for japonica rice); base fertilizer: tiller: panicle fertilizer = 3:4:3, so that you can eat more meals. 1 Base fertilizer: Generally, 50 kg of compound fertilizer and 10 kg of ammonium bicarbonate should be used, and the amount of organic fertilizer should be appropriately increased. 2 points fertilizer: generally divided into two applications, the first time in the 3-4 leaf stage, mu urea 6-8 kg, so that early application, uniform application, to promote the early start of childbirth; the second time in the 6-7 leaf stage , Urea 8-10 kg of urea, promote balanced early-onset, vigorously compete for full spike. 3 Panicle fertilizer: mainly promoting flowering, supplemented by flowering, when the last 4 leaves in the latter half of the leaf (mu of about 10 kg of urea, promote flower growth, consolidate the number of effective panicles; rice in the inverted 1.5 leaves, Mushi 5 kg of urea is used as a preserved fertilizer, and at the same time, biological micro-fertilizer can be sprayed during the booting stage to enhance the photosynthetic capacity of plants and increase seed setting rate and grain weight.3.Pests and weeds control A, chemical weeding water live: Within 4 days after sowing, mu Use 30% swifter EC 100 ml spray; or in the 1.5-2 leaf stage of seedlings, fill shallow water layer below 2 cm, use 60% butachlor EC 75 ml water 50 kg spray, and keep shallow water layer 4-6 Days of dry weather: After sowing, 1-3 days after sowing, wetting and sealing are used to remove water, and 36% of Dingye Mixture is diluted with 150 ml of water to spray;if the grass is seriously damaged, weeding of shallow layer of water in the 2-2.5 leaf stage of the seedlings will be used. 60% butachlor EC was sprayed in 75 ml of water and kept in shallow water for 4-5 days.At the end of the tillering period, there were more fields for broad-leaved weeds, and 20% dimethyltetrachloromethane 100-150 grams per gram plus benzene. Dasong 100 g watering spray, before the field is used to drain the water first, when the rice leaves are not dew, drug is used, and then the water is brought in for a day. Rice transplanting, pest occurs at slightly different times on the species and harm, the need to strengthen forecasting and prevention. The main good early rice thrips, rice weevil and late sheath blight, rice blast, stem borers control.