Amaranth is a perennial perennial vegetable that is widely cultivated everywhere. The roots of amaranth have strong absorption capacity, like fertilization and fertilizer resistance. The requirements for fertilizers are mainly nitrogen fertilizer, with appropriate amount of phosphorus and potassium fertilizers. The amount of fertilizer required for leek varies with the growth period. Generally, the growth and fertilizer consumption in seedling stage are small. Under the conditions of high soil fertility and sufficient base fertilizer, less or no fertilizer can be pursued; It is the harvest season in spring and autumn. The amount of growth and the amount of fertilizer required are large, and a large amount of fertilization should be applied in stages. The 2-4 year old leek grows vigorously, has strong tillering ability, high yield, and requires the largest amount of fertilizer, which is the peak of fertilizer demand. The specific fertilization method is:
Apply enough base fertilizer. Generally, each production anniversary is 1000-1500 kg of fully-fertilized high-quality soft and soft soil per acre, and 25-30 kg of Tianji brand phosphorus phosphate potash is used as the base fertilizer. The base fertilizer is generally applied before wintering. 3 years old or older, and occur in different degrees of "jumping roots" phenomenon, apply appropriate amount of organic fertilizer and phosphorus and potassium fertilizer before autumn and winter or spring return to green, and use thickened soil layer of mature high-quality soft straw fertilizer to cultivate roots To create a good environment for the growth of new roots and the formation of tillers.
Skillful topdressing. After the spring, the temperature rises and fertilization should be combined with the application of organic fertilizer. 20-30 kg of NPK fertilizer per acre, and 1000-1500 kg of manure and urine with water, and 200-300 kg of ash can be applied to the base fertilizer to facilitate rejuvenation . After the leek is returned to the harvest season, the topdressing should be based on quick-acting nitrogen fertilizer, so that the “knife and topdressingâ€, that is, harvesting and topdressing once, can promote growth, accelerate tillering, prolong plant life and increase regeneration yield. The time of the first top dressing should be controlled when the harvested wounds heal and the new leaves grow out. Avoid topdressing immediately after harvesting to avoid causing fat damage. When topdressing, you can apply about 5 kg of urea per acre with water or ditch.
When the temperature is higher than 24 °C, it is not conducive to the growth of amaranth, and generally does not harvest. In order to make up for the nutrient deficiency after the spring harvest and the nutrient consumption of the flowering results, in addition to staying in the field, it is necessary to cut off the young flower moss in time to facilitate rooting. At the same time, it is necessary to apply proper amount of nitrogen fertilizer or mature human waste water 1-2 times. After the autumn, generally according to the growth of amaranth, harvest once, topdressing a fertilizer, each acre can chase the Tianji brand nitrophosphate potassium fertilizer 20-35 kg, pay attention to the front heavy and light. After the harvest stops entering the dormant period, it no longer tops up.
(Wang Xiaobo)
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