Ingenious application of rice panicle fertilizer and grain fertilizer
Scientific application of spike fertilizer and grain fertilizer is the guarantee for high yield, high quality and high benefit of rice. According to the test, it can be proved that rice clever application of panicle fertilizer and grain fertilizer can increase the yield by 20% -25%. Rice panicle fertilizer refers to the application of a certain amount of fast-acting nitrogen fertilizer at the right time during the ear panicle differentiation stage before heading, which helps to consolidate effective tillering in the early stage, reduce and prevent spikelet degradation, and promote the good development of rice panicle. Due to the differences in the fertility, cultivar and meteorological conditions of the paddy fields in different regions, the time and method of topdressing spike fertilizers are also different.
Generally, the top dressing time should be from branching stem differentiation to spikelet differentiation period, about 16-18 days before heading, or when the leaf age index of rice reaches 90%, the flag leaf of rice is just exposed, and the young ears grow to 1-2 mm. The amount of top dressing per mu is: 4-5 kg ​​if using ammonium nitrate, 6 kg if using ammonium sulfate, and 4-5 kg ​​if using diammonium phosphate. Before top dressing, irrigate 3-5 cm deep, block the upper and lower spouts, evenly spread, and then change to normal tube after 4-5 days. In the event of rain and rain, the overgrown rice fields do not need to apply spike fertilizer. Rice topdressing fertilizer refers to a small amount of fertilizer applied 5-10 days after the ear, or a topdressing fertilizer applied 2-3 days before the rice is cracked. Appropriate application can make the kernels full and increase the weight of 1000 kernels; improper application, no effect or greedy late ripening will affect the yield.
Skillful application of grain fertilizer must achieve "three look", that is, look at the sky, look at the field, look at the seedlings. To look at the sky is to grasp the good weather, to apply it skillfully in times of drought, and to apply less rain and rain. To look at the field is to master the soil fertility of different fields, more lean fields, less fertilizer. According to the seedling condition, the seedlings should be thin, and the color of the leaves after heading will be severely yellowed. If the growth is strong and the heads will be lightly yellowed, little or no application will be applied. Generally, fertilizers such as ammonium sulfate and urea are used for grain fertilizers, with 3-5 kg ​​per mu. When applying, shallow water should be irrigated in the field, do not irrigate after fertilization, let it dry naturally. Ammonium nitrate can also be applied if there is no urea. In addition to top dressing in the field, it can also be used for top dressing. the way is:
1. Foliar spray urea solution, concentration 1%, topdressing 5 kg per hectare.
2. Foliar spray potassium dihydrogen phosphate solution concentration 0.5%, spray 2.5 kg per hectare. When the membrane and the seedling are about to contact each other, break the membrane and release the seedling, and pay attention to compact the membrane around the seedling. After wind and rain, observe carefully. If there is water on the membrane to remove the water, the damaged membrane should be pressed or re-covered in time. membrane. When the bean seedlings grow to 3-4 true leaves, water the first water and apply 12 kilograms of urea with the water acres, and do not water for the time being (continuous watering is not easy to form pods). When the pods grow to 3-5 cm, the second water is poured, and the third water is poured 10-15 days later. In late April, use 10% imidacloprid temperature-controllable powder 2000-3000 times solution or 0.3% Sophora plant insecticide 500-1000 times solution or 18% steady oil or high-efficiency cypermethrin 2000-3000 times solution to control aphids.
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