Compared with transplanted rice, direct-seeded rice has the advantages of labor saving, provinces, paddy fields, and provincial costs. It has the advantages of large-scale, large grains, large potential, and high yield. However, it is also difficult to seedlings, grass is easy to ripen, and maturity is late. And other issues. The direct-seeding cultivation technology of rice is a comprehensive application of agricultural technology. From the practical experience of obtaining high yield from direct-seeded rice, we must grasp the cultivation techniques focusing on the quality of the previous sowing. Price :Joint of trading and manufacture for 30 years, we can quote the best price with high quality for you Disposable Butterfly Scalp Vein Set,Butterfly Needle Scalp Vein Set,Disposable Scalp Vein Set,Scalp Vein Set Butterfly Needle Changzhou Yuandong Medical Equipments Co.,Ltd , https://www.czydmedical.com
First, the variety selection of live early rice varieties require moderate ripening, medium tillering, stout stems, resistance to fertilizer down, large varieties of spikes and more varieties, the current promotion of the main cultivars, such as 280, are suitable for direct seeding cultivation.
Second, the seed treatment seed before sowing to have a good four customs: First, the sun seed off, soaking seeds before the sunny sun 1 to 2 days; second is the selection of the seed, soaked seedlings before the election to go to the valley, half full; the third is the soaking disinfection Off, use a 10% soaking needle (2ml) or 1.5% wettable powder 1 pack (10g), pour into a small amount of water and mix well, then add 6kg of water, fully mix and dip 5kg after soaking. , soak for 2 to 3 days and nights, stirring during soaking 2 or 3 times; four is germination off, direct exposure to the ground should be used to sow germination, generally half length grain buds is appropriate, especially in the rain more rain to remind the more sowing.
Third, Daejeon prepares for direct sowing of plowing. It takes about 10 to 15 days before sowing to plow till 2 or 3 days to make sampan. The width of the board is 3 to 4 meters. The surface of the board should be as flat as possible. When sowing, it should be moderately soft and hard so as to prevent the pods from being too soft and sowing too deeply, resulting in bad species and rotten buds. The surface is too dry and hard to affect the seedlings. It is necessary to open a horizontal ditch, a straight ditch and a ditch to prevent the area of ​​water. The basal fertilizer uses 25 kg of superphosphate, and 30 kg of ammonium bicarbonate is applied before muting.
Fourth, sowing links Live rice early sowing of easy to shoot, dead seedlings, too late sowing, maturity delayed, vulnerable to high temperature typhoon damage and affect the next season production. According to the city's air temperature and production practices, it is generally advisable to plant around April 15 to choose a daily average temperature of more than 15°C and plant it on sunny days after sowing for about 3 days. To use seeds reasonably and evenly sowing, the amount of seeds used per mu is controlled between 3 and 5 kilograms, and should not exceed 5 kilograms. If too many groups are easily caused, the group is too large. If the number of seedlings is too small, it will cause insufficient seedlings; Quantitative sowing of the board. At the same time, it is necessary to sow the collapse of the valley, reduce the amount of dew seeds, and guard against seed sinking. Nylon cloth, woven bags or sacks can be used to drag and collapse the valleys to increase the seedling rate.
Fifth, chemical weeding. Due to the simultaneous germination and growth of live weedy weeds and rice seedlings, and the variety, high density and rapid growth of weeds are serious. At the same time, weeds have several emergence peaks. This has brought difficulty to weeding on direct-broad rice fields. If there is slight negligence, it will lead to grass shortage, must be combined and blocked, and medicines must be selected, the correct dosage should be used, and quality should be improved. Do a good job. The first medicament is closed, that is, on the day after sowing, or within 1 to 2 days, 17.2% of pupa wettable powder 200-250 g/mu, and 50 kg of water is sprayed evenly on the board surface, and most of the grass is used for the grass. Broad-leaved grass has a good blocking effect. The second control time is in the period of 2 to 3 leaf stages of rice seedlings. Each acre is filled with 10% gold EC 50 liters or 50% fast killer WP 25-30 g, and watered with 40-50 kg spray. There are special effects.
VI. Fertilizer and Water Management In principle, the management of direct-batch rice slurry shall be based on the principles of “wet emergence, water insulation, shallow moisture, and light storageâ€. After sowing, the seedlings will be ditched and half-guttered, and the water will not accumulate on the board surface. After emergence, they will encounter strong cold air. They will be required to irrigate the water board for a short time to keep the water warm, prevent chilling damage, and timely drain water after warming up; 33 leaf stage should be timely shallow shallow water board, in order to reduce the occurrence of weeds; combination of shallow water in the tiller period, to promote rooting tiller; enough seedlings should be timely field, control of invalid labor, to prevent the group is too large, generally per acre When 250,000 to 300,000 seedlings are planted, it is necessary to start holding the fields so that the maximum number of seedlings does not exceed 400,000, and the percentage of spikes reaching 65% or more, with an effective muzzle of 250,000 mu.
In the early stage of direct-seeded rice, basic fertilizer should be applied, surface fertilizer should be applied, early rice seedlings should be promoted, and more tillers grow up; medium-term fertilizer consumption should be controlled, population growth should be controlled, ineffective tillering should be reduced, and spike rate should be increased; late panicle fertilizer should be supplemented. The flocculation increases grain and prevents premature aging and increases grain weight. Based on the application of basal fertilizer, 5 to 5 kg of urea are applied during the 2 to 3 leaf stage, 5 kg of urea and 7.5 kg of potassium chloride are applied during the 5 to 6 leaf stage, and the urea is applied to the tip of the flag leaf when it is inverted. kg.
VII. Preventing the lodging of the tilled seedlings of the live direct seeding and the distribution of the root system is relatively shallow, which is one of the reasons for the easy lodging. In addition to the correct determination of the use of species, but also should grasp the following points:
The first is scientific fertilization. According to the target yield and soil fertility level to determine the total amount of fertilizer, in addition to the organic and inorganic combination, a reasonable mix of nitrogen, phosphorus and potassium, the use of "promoting before, control, stabilize the" fertilization method. This fertilization method is based on the application of base fertilizer, the early stage of early application of manure, the middle of the field control fertilizer, control of the invalid tiller, late application of discretionary panicle fertilizer, in order to achieve multiple purposes of multiple grains.
The second is reasonable irrigation. The principle of "moisture mulch, multiple light lags, and late intermittent irrigation" means that no water will accumulate on the board surface after sowing, and after 2 leaves and 1 heart will be filled with shallow water sampan plates, drainage shall be promptly drained to the field when the planned number of panicles is 80%. Repeatedly put it on hold until it stops. In the middle and later periods, intermittent irrigation is used to facilitate the development of the roots and strength.
The third is chemical regulation. During the jointing stage (about 30 days before heading), 300PPM paclobutrazol can be sprayed to reduce the plant height and increase lodging resistance.
The fourth is pest control. Special attention should be paid to the middle and late stages of sheath blight and rice planthoppers. Because the population of live-rice rice in the middle and late stages is relatively large, the degree of canopy density in the field is high, and occurrence of sheath blight and rice planthoppers in the middle and late stages is relatively serious, and more attention must be paid to it.
Remark :More detail can not be showed completely, please do not hesitate to inquiry us and we are always waiting for you.