Before cultivating the yam or during the cultivation process, the yam must be fertilized. The yam in different growth stages needs different fertility to promote growth. Only sufficient and correct fertilization can promote the high yield and harvest of the yam, and the organic fertilizer can be solved. The difficulty of yam cultivation.
The fertilization of yams requires mastery of the characteristics of yam's demand for fertilizer and yam's fertilization techniques. To achieve symptomatic fertilization:
1, need fertilizer characteristics
The amount of fertilizer needed for yam is very large, because the yam has a long growing period and therefore requires a long-term organic fertilizer, so as to ensure the needs of yam during each growth stage.
In the early stage of yam growth, organic nutrients are released slowly because of low temperature. At this time, it is necessary to supply appropriate amount of rapid nitrogen fertilizer to promote the growth of stems and leaves.
In the middle and later stages of yam growth, the tuber growth of yams is rapidly increasing. At this time, yam needs to absorb a large amount of nutrients, and it is necessary to supply yam with sufficient phosphorus and potassium fertilizers. At the same time, special attention should be paid to prevent premature deficiencies in the shortage of fertilizers.
In addition, yam is a bogey crop. Excessive chloride ions in the soil will affect the growth of yams and cause vines to thrive. Tuber yields will be reduced, quality will be degraded, and will be fragile and easy to fold. As a result, yams will not survive storage and transportation. Therefore, yam must not be suitable. Apply chlorine-containing fertilizer.
2, fertilization technology
Most of the yam fertilization is based on the principle of basal fertilizer and supplementing fertilizer.
Basal fertilizer is mainly composed of high-quality farmyard manure and compound fertilizer that are fully decomposed and can also be applied with nitrogen, phosphorus and potassium.
Top dressing is generally in the tuber enlargement period of yam, due to the growing trend of the plants, to apply suitable amount of available fertilizer to promote the healthy growth of yam and prevent premature aging.
For yam fertilization, generally 2,000 to 4,000 kilograms of farmyard manure is applied per acre, and 60 to 80 kilograms of compound fertilizer (18-18-18) is equal in amount (or both are mixed well before application), or 2,000 kilograms of organic manure and 25 Urea are used. Kg, 25 kg of diammonium phosphate and 30 kg of potassium sulfate.
In addition, it should be noted that the basal fertilizer should be spread evenly throughout the field before the site is set. After fertilization, the fertilizer is ploughed and turned into a 30 cm layer.
The skillful skill of top-dressing is "heavily weighted in the early stage, stable in the middle period, and protected from premature decay in the later period."
Fertilizing yam according to the above methods can make yam grow faster, ensure growth, and have good health. High quality and high yield are very easy.
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