CN1130609A - Long-acting urea coated with rare-earth - Google Patents

Abstract

A long-acting urea features that urea fertilizer is as core and the mixture of rare-earth, calcium clay and nitrated restrainer is as wrap. The utilization rate and long action of urea are increased. Its rare-earth component can promote development of plant root, branch and leaf and photosynthesis, and increase yield.

Description

Long-acting urea coated with rare-earth

The invention belongs to the slow coated fertilizer, is the long-acting urea fertilizer that contains rare earth element.

What research was both at home and abroad released at present is core with water-soluble granular fertilizer, the outside coats the coating slow-release fertilizer of various inorganicss or organism formation, as wrap Thio Urea or carry out the fertilizer of layer with paraffin and various petroleum resin, synthetic resins (just like polyethylene, polypropylene, polyvinyl chloride, acrylic acid fat and Polyurethane etc.) as coating, bag, though they have played the active effect of slow, but because above-mentioned coating material majority costs an arm and a leg, cause the fertilizer price higher, be not easy to promote.

Especially existing coated fertilizer, both useless because of most of coated fertilizers are not the nutritive element of plant to crop, do not have the effect of improving the soil yet, even also can cause soil pollution.

Chinese patent CN851010083 discloses a kind of coated fertilizer of making integument with nitrogen phosphorus mud, fused(calcium magnesium)phosphate, precipitated superphosphate or bone meal, its integument itself also is the main nutrient elements of plant, it is a kind of polyelement composite fertilizer, but the powdered calcium magnesium-phosphorus fertilizer in the integument is a sheet structure, there are many holes that differ in size on its surface, and can not hinder the infiltration of water molecules effectively, therefore, water soluble fertilizer in the core still can be released in the soil with speed faster, loses the slow effect.

Chinese patent 89102295, " a kind of slow effect on packaged fertilizer " disclosed, its vegetables oil, animal oil or its greasy filth or its mixture plant is had certain trophism, or its modifier is as sustained release dosage, under the effect of natural and inorganic adhesive, with fused(calcium magnesium)phosphate or thomas phosphate the water-soluble chemical fertilizer of said core is wrapped up the slow-release compound fertilizer of making, its mechanism mainly is with sustained release dosage consumption and integument thickness, keeps the complete soaking time of the water-soluble chemical fertilizer of core.This kind fertilizer is to contain organic and inorganic compound manure organic and that contain NPK, and rational analysis is a kind of preferably fertilizer.But as if from its prescription and formation, its integument accounts for 40-77% of fertilizer gross weight, and core fertilizer only accounts for 20-50% of gross weight, and " core " has been not core, the quick-acting of inorganic fertilizer is watered down, and effect has reduced.

Purpose of the present invention is the nitrogen loss for the urea of minimizing in being manured into soil, and is approach with the coated carbamide, and a kind of existing above-mentioned insufficient long-acting urea coated with rare-earth of coated carbamide that remedies is provided.

The present invention is realized by following technical scheme, it is characterized in that it is with 80% (weight percentage, down with) urea fertilizer be core, the rare earth with 0.1%, 20% calcium ± and the miscellany that a kind of nitrification inhibitor of 0.76 ‰-2% is formed be that the external parcel layer constitutes.Said nitrification inhibitor and consumption thereof are preferably selected for use following a kind of:

(1) 2-ammonia-4-chloro-6-methyl is given a tongue-lashing fixed (AM), 0.76 ‰-3 ‰;

(2) 2-chloro-6-trichloromethyl is given a tongue-lashing fixed (CP), 1.85 ‰-5.45 ‰;

(3) 4-amino-1.2.4 triazolium salt hydrochlorate (ATC), 1.85 ‰-9.25 ‰;

(4) 1-amidino groups-2 thiocarbamide (ASU), 1.14%-2%.

The above-mentioned raw materials prescription makes in the continuous packing machine that constantly rotates, and packing gets product after drying.

The nitrogen loss that product of the present invention has not only overcome urea lacks limit, increase operation rate more than one times, but become longer-term and supply with the long-acting carbamide that the crop different growing stages needs, and owing to added rare earth, proved that now rare earth has stronger growth regulating effect to plant, it can promote crop to take root, germinate, and is with luxuriant foliage and spreading branches in leafy profusion, increase chlorophyll, photosynthesis is strengthened.Also can promote absorption and the conversion of crop to nutritive elements such as phosphorus.Thereby both increased output, improved quality of agricultural product again, brought many economic benefits and positive social effect.

Embodiment 1:

Take by weighing raw material (weight) by following proportioning

Urea: 80 rare earths: 0.1

Calcium soil: 20 2-chloro-6-trichloromethyl pyrroles are fixed: 0.185

Earlier urea is placed in the packing machine, again an amount of 2-chloro-6-trichloromethyl is given a tongue-lashing the fixed aqueous solution, all sparge on the urea granules surface in the continuous packing machine that is rotating, make and be damp state, calcium soil and rare earth powder that this speed per hour will mix are sprayed on the urea granules, form integument, the drying packing, get promptly that to contain N amount be 37.8%-38.0%, granularity is

0.85 the long-acting urea coated with rare-earth of-2.80mm.

Embodiment 2:

Only be to change inhibitor into 2-ammonia-chlorine-6-methyl pyrrole to decide, its consumption is 0.1, and other are all identical with embodiment 1, no longer repeat.

Claims (2)

1. rare earth look film long-effect urea is characterized in that the urea fertilizer of (content percentage ratio, down with) is a core with 80% for it, and the miscellany that the rare earth with 0.1%, 20% calcium soil and a kind of nitrification inhibitor of 0.76 ‰-2% are formed is that the external parcel layer constitutes.

2. according to the described long-acting urea coated with rare-earth of claim 1, it is characterized in that said nitrification inhibitor and consumption thereof preferably choose following four kinds a kind of:

(1) 2-ammonia-4-chloro-6-methyl is given a tongue-lashing fixed (AM), 0.76 ‰-3 ‰;

(2) 2-chloro-6-trichloromethyl is given a tongue-lashing fixed (CP), 1.85 ‰-5.45 ‰;

(3) 4-amino-1.2.4 triazolium salt hydrochlorate (ATC), 1.85 ‰-9.25 ‰;

(4) 1-amidino groups-2 thiocarbamide (ASU), 1.14%-2%.