1. In general, it is best to turn fields or clay land for fall. When spring turning is needed, it should be turned to the ground early. If the soil cannot be turned in the ground, the land will not open in the process of bubbling, and it will be difficult to ensure the quality of the land. The land is not as fine as it can be, the finer it is, the less air in the soil, the floor knots affect the growth of the roots. Therefore, it is necessary to achieve the standard of coarseness and coarseness under the premise of ensuring the leveling, and to ensure the quality of transplanting, but also increase the porosity of the soil.
2. The land preparation requirements for no-tillage, light-spotted, water-saving cultivation techniques for rice in water-saving fields is to fill the land 3-5 days before transplanting without transplanting the soil. You must not dive in the depths of the water before you leave. Because this time we have also taken into consideration the weeding, weeding effect is poor. Earthworms should be softened on the surface of 3-5 cm soil layer in order to facilitate transplanting lotus seedlings. This technology can save 70% of the water in the field and greatly alleviate the shortage of spring water in the field and water saving in well-irrigated rice fields. However, this technology is not suitable for the leakage of land such as sand.
3. Saline-alkali paddy fields In order to facilitate the washing of alkali, it is generally required to select a land with convenient drainage, and the paddy field pool should have a single row of single irrigation. When paddy fields are lightly salted (pH 8.0 or lower), they do not need to be washed with alkali except for new land. When pH 8.0-8.5 is moderately saline, it must be washed 1-2 times. When washing saline and alkaline, the water layer must not have smashed blocks, soak for 2-3 days, and rehydration should be sufficient after washing with alkali to prevent it from drying out and prevent salt and alkali from recovering. After washing the salt and alkali, the pH of the water layer in the paddy field was reduced to a slight saline-alkali level and fertilized and transplanted.
4. The machine is inserted into the seedlings of the Putian mechanical transplanter. The weight of the transplanter is heavy and the site preparation requirements are strict. Machine transplanting ground can not be too deep, when the ground is too deep when the plow is easy to uneven, resulting in inconsistent depth of transplanting, generally about 10 cm can be. When using large-scale tractors, make sure that their wheels do not move in the same position in order to reduce unevenness at the bottom. The flatness after the depression should be within 5 cm.
5. Drought-changing paddy fields In general, corn fields use atrazine, oxathione, saikojin and other herbicides, and soybean fields use weedicides such as chlorate, douxon, Guangmianling to weed. The residual period of these herbicides is more than 2 years. When dry field is used to change the paddy field, these herbicides are prone to phytotoxicity, such as yellowing, dwarfing, slow growth, little tillering or no tillering. If the rice field using the above-mentioned pesticide is changed to rice, try to wait until after the residual period is over. When the dry field is not changed, even if the above-mentioned pesticides are not used, the dry land must be washed once before it is changed to rice. Before or after transplanting, fight some pesticide antidote such as fertile soil and good harvest.
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