How to do a good job in water slurry management? In the process of planting direct seeding rice, water slurry management is very important. The direct seeding rice is from the sowing to the three-leaf stage, which is the stage of rooting out the leaves and forming strong seedlings. The water slurry management requirements during this time are to control the water and protect the seedlings, to refine the seedlings, and to not easily carry out irrigation, but also to maintain the soil. Moist, this is conducive to the deep rooting of the roots and the early emergence and rapid development of the seedlings. When the seedlings grow to the 3-leaf stage, the water slurry management of the direct seeding rice is basically the same as that of the transplanted rice. The specific contents are as follows.
1. After the three-leaf stage of direct seeding rice, it is necessary to establish a shallow water layer to promote tillering. When the number of seedlings is predetermined, the drainage field should be done in time. In this process, it is necessary to pay attention to the shallow distribution of direct seeding rice roots. You can only take a few steps, don't put it on again, so that the roots are not broken and the effect is strong. In the later stage, it is necessary to maintain dry and wet alternate irrigation, and pay attention to prevent lodging.
2. On the fertilizer, the population of direct seeding rice is large, and the growth period of Honda is long. Therefore, the total fertilization amount is larger than that of transplanted rice. Generally, the sum of the applied amount of transplanted rice and the amount of fertilizer applied in the field is suitable. When fertilizing, the principle of “pre-promotion, central control, and post-complementation†should be adopted. In the early stage, it is necessary to promote early emergence, multi-pointing, and growing up of the seedlings; in the medium term, control the growth of the group to prevent ineffective tillering and increase the rate of ear formation; It depends on factors such as potential and weather.
3. Usually, in the process of direct seeding rice cultivation, 20-25 kg of superphosphate and 7.5 kg of potassium chloride per acre are applied. If the effective potassium content in the soil is generally high, potassium fertilizer may not be applied. For the lack of effective zinc content in the soil, it is necessary to supplement some zinc fertilizer in the later direct seeding rice cultivation, generally 0.5-1 kg of zinc sulfate per mu, which can effectively prevent rice stagnation and ensure strong Miao to increase production. At the same time, zinc fertilizer has a 3-5 year aftereffect, so it is not necessary to apply it every year.
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