How to master the method of fertilization for rice
Organic fertilizer is used in combination with chemical fertilizer. Organic fertilizer is rich in organic matter, which can fertilize the soil, provide a variety of nutrients, and provide compounds with auxin and hormone properties. The application of organic fertilizer helps to maintain the storage of nitrogen in paddy soil. Organic fertilizers release nutrients slowly, while chemical fertilizers are mostly quick-acting fertilizers with fast nutrient supply. The combination of the two can make the nutrient supply more stable. Organic acids and humic acids in organic fertilizers can combine with iron and aluminum in soil, reduce the fixation of phosphate fertilizer by soil, and increase the amount of available phosphorus and the circulation of phosphate fertilizer in soil.
The combined application of nitrogen and phosphorus or nitrogen, phosphorus and potassium fertilizer and single application of nitrogen fertilizer can easily lead to green, lodging, blast, high empty grain rate and affect the yield of rice. The yield of combined application of nitrogen, phosphorus and potassium fertilizer was 54 kg higher than that of single application of nitrogen fertilizer per mu.
Suitable dosage, combined application of base fertilizer and topdressing fertilizer. The more fertilizer is applied, the more the yield can be increased, but the appropriate amount and reasonable proportion can increase the yield. According to the appropriate period of rice seedling growth, appropriate amount of chemical fertilizer can promote the robust growth of rice. The frequency of topdressing should be determined according to the local climatic conditions and seedling conditions.
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What are the soil types and nutrient status of rice in Sanming City
Our city is rich in land resources. The total land area of the whole city is 34.44 million mu, of which the cultivated area is 256.31 &127,000 mu, accounting for 7.4% of the total land area (of which the paddy field area is 244.19 million mu, accounting for 7.1% of the total land area, and the farmland area is 121,200 mu, accounting for 0.3% of the total land area). Paddy soil can be divided into four types according to different distribution topography, such as ocean surface field, slope terrace field, mountain ridge field and stream side field, with the proportion of 4.6:5:6.2:1. 127; the surface field is of water retention type
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How to cultivate strong rice seedlings with paclobutrazol and uniconazole
Paclobutrazol and uniconazole are both plant growth regulators, which have good effects on controlling growth and promoting tiller, preventing rigidity, preventing abortive seedlings and increasing panicle, grain and yield in rice seedling raising. The method of using paclobutrazol is to spray 100kg paclobutrazol with 300ppm concentration per mu of seedling field when one leaf is of one heart, so as not to miss spray or re-spray. When spraying, it is necessary to release the moisture of the seedling field and keep the field free of stagnant water. The usage of uniconazole is as follows: soaking seeds with 50-200ppm concentration of uniconazole solution for 48 hours, seeds and chemicals.
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