First, finishing Datian. Grab sunny days and early ploughing and drying up the soil, ripen the soil, improve permeability, improve physical and chemical properties, in order to increase its capacity for supplying fertilizer, water supply, and gas supply, so that rice can be planted early after transplanting and early tillering. Before throwing a plant, it is necessary to rectify the field. Generally, one plowing, one plowing, and one plowing are performed. For dry seedlings, it is required to remove the earthworms, spin the water, turn the tillage, level the earth, eliminate the debris, and reach the standard of flat land, muddy pulp, and less surface debris, to prevent the unevenness of the field, resulting in floating and drying. Seedlings and other phenomena.
Second, apply base fertilizer. Dry seedlings have the advantages of strong explosive force and rapid growth of stem seedlings. In order to follow the principle of "controlling the amount of stem shoots in the early stage, amount of main attacking florets in the middle period, and increasing the amount of leaves in the later period", combined with the characteristics of rice suction fertilizer and soil fertilizer supply, it must be Increase the total amount of fertilizer input, adjust the types of fertilizers used, scientifically allocate the ratio of fertilizer operations, give full play to the potential of varieties to increase production, and obtain higher yields. For the 600 kg per mu field, the total amount of fertilizer used for Datian is: 15-20 kg of pure nitrogen, 4-6 kg of phosphorus pentoxide, and 6-8 kg of potassium oxide. Therefore, based on the application of organic fertilizer, base fertilizer is applied to 40 kg of compound fertilizer and 30 kg of ammonium bicarbonate per acre to meet the needs of rice growth and development.
Third, timely throwing. This year's rice dumplings, especially in the hilly areas, should focus on four points: First, on the basis of last year, we will integrate the strong, reduce seedlings, transfer fertilizer, and control water to improve the matching rate of the technology; To improve the quality of castings, the emphasis is on throwing evenness, single plant dispersal and seedling uprightness, so as to throw a piece, drive one, consolidate one, and ensure the success rate of the technology; third is to encourage short-term delivery, 25 days For ages, five leaves are appropriate; the fourth is to grab the cricket before the onset of the rainy season. In the throwing method, in accordance with the "major drought and flooding with a large amount of pre-casting, moderate drought and flooding after sowing; the early drought and flooding with the first sowing date, and the late drought and flooding after sowing; the first throwing in hybrid rice. After throwing glutinous rice" principle.
Fourth, improve the quality
1. Disposal of plots: To improve the survival rate of casters and implement mass cultivation of groups, it is necessary to control the amount of stem pods in the early stage and to reduce the number of basic seedlings. Generally, 15,000 holes and 4-5 million basic seedlings are thrown per acre for hybrid rice; Throw 2 million points, 6-7 million basic seedlings. When dumping, the first thing is to let the water in the fields dry so that the seedlings can take root and stand the seedlings. The second is to prevent the seedlings from spreading in the rain and prevent the seedlings from adhering to each other, causing uneven casting, thereby increasing the quality of casting; Equalization of seedlings to prevent the emergence of piles of seedlings and large blank; Fourth, after throwing in the hot sun, to ditch irrigation seedlings to prevent high temperature burns seedlings; five is a good operation line, leaving a good level of water.
2. Expanding and diluting field plots: Be sure to increase the row spacing, stabilize the plant spacing, and insert shallow water. The row spacing and basic seedlings were arranged as follows: hybrid rice (13.2-16.5) cm × 29.7 cm, planting 15,000 holes per acre and 5-60000 basic seedlings; indica rice 13.2 cm × (23.1-26.4 cm) per acre. 1.8-2.2 million points, 6-8 million basic seedlings.
Fifth, timely removal. Drought and seedling throwing in 80% of the seedlings will be covered with water after standing upright, and the depth of mud will be covered with mud. After 5 days or 7 days after throwing or planting, combined application shall be applied in appropriate amount, and 10 to 15 kg of ammonium per acre shall be applied. In the delivery period, shallow wet irrigation is adopted, alternating wet and dry, and the occurrence of childbirth occurs.
(Zhang Wei, Agricultural Bureau of Ji County, Jiangsu Province; Zhang Zhiying, Zhang Zhuang Town, Pei County Agricultural Technology Promotion Center)
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