Special nitrogen-phosphorus-potassium fertilizer for boron-free pineapple seedlings containing chelated trace elements

Abstract

The invention relates to a special nitrogen-phosphorus-potassium fertilizer for boron-free pineapple seedlings containing chelated trace elements. The special nitrogen-phosphorus-potassium fertilizer comprises the following components in parts by weight: 99 to 104 parts of potassium nitrate, 37 to 45 parts of ammonium dihydrogen phosphate, 55 to 60 parts of urea, 0.5 to 0.8 part of chelated copper, 2.5 to 3.5 parts of chelated iron, 0.2 to 0.25 part of chelated zinc and 1.0 to 2.0 part of chelated manganese. The special fertilizer for pineapple is also a formulated fertilizer for seedlings, has an excellent root-promoting effect on just transplanted seedlings, leaf rolling or falling of pineapple leaves can be avoided since no boron is contained, pineapple plant type can be tighter, the leaves are preferably stretched, the pineapple plant is slightly acid, the ionic stability is high, the safety is high, the water-soluble capacity is high, the fertilizer can be used with a plant protection product without strong acid or strong base simultaneously, the chelated trace elements are easily absorbed, the utilization rate can reach more than 90%, the cost is greatly reduced, the root-promoting effect of pineapple seedlings is improved, and the conditions such as soil hardening and salinization are relieved.

Description

technical field [0001] The invention relates to a fertilizer, in particular to a boron-free nitrogen, phosphorus and potassium fertilizer specially used for pineapple seedling cultivation containing chelated trace elements. Background technique [0002] Pineapple is one of the famous tropical fruits with short stems. Many leaves, arranged in rosettes, sword-shaped, apex acuminate, entire margin or with sharp teeth, green on the belly, pink-green on the back, often brownish-red on the edge and apex, the leaves on the top of the inflorescence become smaller, often red, belonging to Angiosperms, monocots, powdery endosperms, like light, have high food value such as raw food, twisted juice, decoction, etc., and medicinal value such as relieving heat and thirst, digestion and diarrhea, etc., can be used as a food for ruminants High-quality feed, potted flowers, odor removal, etc. [0003] Pineapple is mainly planted in sandy water, and the choice of vigorous crown buds or desce...

AI Technical Summary

Problems solved by technology

Such as a kind of chelated compound trace element fertilizer and its preparation method proposed by patent CN103467159A, but EDTA chelate is mostly used. EDTA chelate is not only expensive, but also has less metal-rich element content, and the pH needs to be above 7 to be good. Therefore, it is difficult to ensure fast and good growth of boron-free pineapple seedlings, and it is difficult to control the dilution ratio when applying. Excessive salt will cause difficulty in water absorption, physiological dysfunction and even seedling burning, which needs to be improved urgently