Five measures for drought-resistant seedling protection of late rice

For late drought-resistant rice, in addition to doing everything possible to open up water sources, some appropriate management measures can be taken to seedlings to reduce disaster losses. The author proposes to try the following five methods for drought and seedling protection.

First, water-saving irrigation, promote root bar. In the case of more water and more fertilizers, the growth rate of the above-ground part of the rice is fast, and when the water is less, the growth of the roots is accelerated, and it is plunged deep into the soil. After the rice was transplanted, the whole plant growth of the seedlings was affected, but the growth of the roots was faster than that of the above-ground parts. Therefore, we can use the trend to promote the root system to deepen the soil layer, which can absorb the moisture in the deep, but also lay a good foundation for the rapid growth of the seedlings after the release of the drought. In the farmland, there is a saying that "the grass is dried and the grass is dry." The period of flat grass is not as dry as possible. There are two ways to save water during this period and avoid drought hazards:

One is wet irrigation. When the irrigation water is not used, the former water does not see back water and keeps the soil moist, which not only maintains the growth of rice, but also saves water. In the case of proper management, rice can be reduced (with some trials it can increase production), and water can save more than 60%. The other is intermittent irrigation. In places where the water conditions are worse, this method is adopted before the ear of rice is differentiated (the most drought-tolerant rice is the booting stage). Each time the time of watering depends on the amount of water, it can be intermittent for 7-10 days until the next time. After rehydration after the rain, higher yields can still be obtained.

Second, less nitrogen fertilizer, potassium fertilizer. When the nitrogen content in the soil is high, the root growth of rice is slow and shallow. Less nitrogen fertilizer can promote deep roots, use deep soil moisture, and relieve drought. According to relevant studies, the application of potassium chloride has the effect of relieving drought in rice, and it can spray approximately 1 kg of potassium chloride per acre during the heading and flowering period.

Third, remove weeds, surface cultivators. In addition to rice plant transpiration and field leakage, water consumption in paddy fields also includes transpiration of weeds and evaporation of soil surface. In order to reduce the water consumption to a minimum, all weeds should be shovelled (extracted) from the dry rice fields. The rice fields that have been hardened or overground should be ploughed and loosened to cut off the capillaries in the soil and reduce the moisture in the bottom layer to evaporate on the surface.

Fourth, soil cover reduces evaporation. In order to prevent excessive evaporation of water caused by soil surface exposure, a thick layer of coarse sand can be tried in the muddy rice fields. In this way, it can block the capillarity of the soil and at the same time improve other physical properties of the soil. In addition, you can also cover the blue and green grass on the mud surface to reduce sun exposure.

V. Management after rehydration of dry rice fields. When autumn rain comes, field management should be strengthened, applying 7-8 kilograms of urea per acre, and promoting the rapid growth of seedlings, resulting in mid-term delivery. In addition, we must strengthen the prevention and control of various pests and diseases.

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