CN105949000A - Zinc-rich watermelon fertilizer and preparation method thereof - Google Patents

Abstract

The invention discloses zinc-rich watermelon fertilizer. The zinc-rich watermelon fertilizer is prepared from raw materials in parts by weight as follows: 200-210 parts of rice straw, 20-21 parts of kaolin, 4-5 parts of peanut hulls, 1-2 parts of brown sugar, 10-11 parts of urea, 2-3 parts of eggshell powder, 0.1-0.2 parts of lactic acid bacteria, 1-1.1 parts of potassium oxide, 1.2-1.3 parts of calcium magnesium phosphate fertilizer, 1.1-1.2 parts of zinc sulfate, 15-16 parts of polyvinyl alcohol, 1-1.1 parts of tea polyphenol, 1-1.1 parts of carbon nanotubes, 1.2-1.3 parts of beta-cyclodextrin and 800-810 parts of ammonia water with the concentration of 28%. Amino groups are introduced into biochar prepared from the rice straw and can be chelated with heavy metal, the heavy metal adsorption capacity of the fertilizer is improved, and the contamination effect of the heavy metal on soil and the environment is relieved; further, the carbon nanotubes are added to an enveloping liquid, the mechanical strength of a film can be improved, and the slow release effect of the film can be improved by means of the added tea polyphenol; besides, the fertilizer is rich in zinc and can increase the zinc content of cultivated watermelons.

Description

A kind of zinc-rich Citrullus vulgaris fertilizer and preparation method thereof

Technical field

The present invention relates to fertilizer processing technique field, particularly relate to a kind of zinc-rich Citrullus vulgaris fertilizer and preparation method thereof.

Background technology

Shi Ge large agricultural country of China, its crops rice straw quantity is the hugest, and according to year investigation statistics, rice straw total amount reaches about hundred million tons, and with the speed increment of annual hundred million tons.During utilizing crops rice straw, the collection of rice straw, transport and utilize during required plant equipment high cost, industrial chain is shorter, lacking the problems such as the cognitive mistaken ideas of technical support and people makes the utilization rate of crops rice straw the highest, the considerable regional burning that occurs going out of use crops rice straw, causes the wasting of resources, environmental pollution.Biomass carbon is to be formed by biological material carbonizations such as crops rice straw, wood flours.Biomass carbon has improvement result to the aspect such as soil physics, chemical property.But it is mostly to mix biomass carbon with base fertilizer to be manured into soil at present, so causes biomass carbon transporting, store, the aspect such as to use limited.Therefore, crops rice straw is prepared as biomass carbon base manure material, can have effective solve its transporting, store, use etc. the problem of aspect, have broad application prospects.

Summary of the invention

The object of the invention is contemplated to make up the defect of prior art, it is provided that a kind of zinc-rich Citrullus vulgaris fertilizer and preparation method thereof.

The present invention is achieved by the following technical solutions:

A kind of zinc-rich Citrullus vulgaris fertilizer, is prepared by the raw materials in:

Rice straw 200-210, Kaolin 20-21, Pericarppium arachidis hypogaeae 4-5, brown sugar 1-2, carbamide 10-11, egg-shell meal 2-3, lactic acid bacteria 0.1-0.2, potassium oxide 1-1.1, calcium magnesium phosphate 1.2-1.3, zinc sulfate 1.1-1.2, polyvinyl alcohol 15-16, tea polyphenols 1-1.1, CNT 1-1.1, cycloheptaamylose 1.2-1.3, the ammonia 800-810 of 28%.

The preparation method of described zinc-rich Citrullus vulgaris fertilizer, comprises the following steps:

(1) by CNT and cycloheptaamylose mixed grinding 1 hour, then gained material being added appropriate deionized water ultrasonic disperse 2 hours, centrifugation, gained precipitate with deionized water washs 2-3 time, and at 75 DEG C, vacuum drying 24 hours, are ground into powder；

(2) polyvinyl alcohol is added the deionized water of 10 times, at 45 DEG C, constant temperature stirs swelling 3 hours, is then heated to 95 DEG C of stirring to polyvinyl alcohol and is completely dissolved, then adds step (1) gained material, tea polyphenols when temperature is down to 45 DEG C, it is sufficiently stirred for, obtains coating liquid；

(3) rice straw is pulverized, with 28% ammonia mix, send in hydrothermal reaction kettle, at 200 DEG C, reaction 20 hours, are cooled to room temperature, and it is colourless for being washed with water to effluent, is dried to constant weight, obtains biomass carbon at 60 DEG C；

(4) Pericarppium arachidis hypogaeae is pulverized, mix with brown sugar, egg-shell meal, add water and make material moisture reach 40-45%, access lactic acid bacteria, ferment 7-8 hour；

(5) after biomass carbon, the carbamide respectively pulverizing of size-reduced machine, 40 mesh sieves are crossed; then the raw material that the biomass carbon after pulverizing, carbamide are not used with step (4) gained material and above-mentioned technique mixes; it is placed in granulating disc; rotary speed is adjusted to 30r/min; rotating disk inclination angle is 45 °; after material fully mixes; with aerosol apparatus, water is sprayed into mixing; the addition of water is the 14-15% of weight of material, to be formed after stop pelletize, gained material is placed in electric drying oven with forced convection; dry to constant weight at 40 DEG C; the most uniformly spray coating liquid, be dried, to obtain final product.

The invention have the advantage that rice straw is made biomass carbon and joined in fertilizer by the present invention, the water-holding capacity of soil can be increased after applying farmland, the stability of soil agreegate, strengthen soil heat absorption capacity, and through reacting with ammonia, biomass carbon introduces amino, amino energy and heavy metal chelating, improve the ability of its Adsorption of Heavy Metals, slow down heavy metal to soil and environment pollution effect, and the present invention adds CNT in coating liquid, the mechanical strength of film can be improved, and CNT adds, and cycloheptaamylose is modified improves CNT dispersibility in water, the tea polyphenols added can introduce hydrophobic benzene radicals, improve the hydrophobicity of film, so that water absorption rate declines, improve the slow-releasing of film, in addition, the fertilizer of the present invention is rich in zinc, the Zn content of the Citrullus vulgaris cultivated can be improved.

Detailed description of the invention

A kind of zinc-rich Citrullus vulgaris fertilizer, is made up of the raw material of following weight portion (kilogram):

Rice straw 200, Kaolin 20, Pericarppium arachidis hypogaeae 4, brown sugar 1, carbamide 10, egg-shell meal 2, lactic acid bacteria 0.1, potassium oxide 1, calcium magnesium phosphate 1.2, zinc sulfate 1.1, polyvinyl alcohol 15, tea polyphenols 1, CNT 1, the ammonia 800 of cycloheptaamylose 1.2,28%.

The preparation method of described zinc-rich Citrullus vulgaris fertilizer, comprises the following steps:

(1) by CNT and cycloheptaamylose mixed grinding 1 hour, then gained material being added appropriate deionized water ultrasonic disperse 2 hours, centrifugation, gained material is washed with deionized 2 times, is vacuum dried 24 hours, is ground into powder at 75 DEG C；

(2) polyvinyl alcohol is added the deionized water of 10 times, at 45 DEG C, constant temperature stirs swelling 3 hours, is then heated to 95 DEG C of stirring to polyvinyl alcohol and is completely dissolved, then adds step (1) gained material, tea polyphenols when temperature is down to 45 DEG C, it is sufficiently stirred for, obtains coating liquid；

(3) rice straw is pulverized, with 28% ammonia mix, send in hydrothermal reaction kettle, at 200 DEG C, reaction 20 hours, are cooled to room temperature, and it is colourless for being washed with water to effluent, is dried to constant weight, obtains biomass carbon at 60 DEG C；

(4) Pericarppium arachidis hypogaeae is pulverized, mix with brown sugar, egg-shell meal, add water and make material moisture reach 40%, access lactic acid bacteria, ferment 7 hours；

(5) after biomass carbon, the carbamide respectively pulverizing of size-reduced machine, 40 mesh sieves are crossed; then the raw material that the biomass carbon after pulverizing, carbamide are not used with step (4) gained material and above-mentioned technique mixes; it is placed in granulating disc; rotary speed is adjusted to 30r/min; rotating disk inclination angle is 45 °; after material fully mixes; with aerosol apparatus, water is sprayed into mixing; the addition of water is the 14% of weight of material, to be formed after stop pelletize, gained material is placed in electric drying oven with forced convection; dry to constant weight at 40 DEG C; the most uniformly spray coating liquid, be dried, to obtain final product.

It is used for the fertilizer of the present invention planting Citrullus vulgaris experiment, selects 5 mu of planting bases, use the fertilizer of the present invention; as experimental group, 5 mu of base planting requirements routinely of matched group execute common fertilizer, and other condition is identical; experiment proves; the Citrullus vulgaris of experimental group plantation, in the case of reaching equal production volume, greatly reduces Fertilizer application amount, and raw material is easy to get simultaneously; cost of material ratio is relatively low; save labour, protect environment, on year-on-year basis economic raising 20.8%.

Claims (2)

1. a zinc-rich Citrullus vulgaris fertilizer, it is characterised in that be prepared by the raw materials in:

Rice straw 200-210, Kaolin 20-21, Pericarppium arachidis hypogaeae 4-5, brown sugar 1-2, carbamide 10-11, egg-shell meal 2-3, lactic acid bacteria 0.1-0.2, potassium oxide 1-1.1, calcium magnesium phosphate 1.2-1.3, zinc sulfate 1.1-1.2, polyvinyl alcohol 15-16, tea polyphenols 1-1.1, CNT 1-1.1, cycloheptaamylose 1.2-1.3, the ammonia 800-810 of 28%.

The preparation method of zinc-rich Citrullus vulgaris fertilizer the most according to claim 1, it is characterised in that comprise the following steps:

(1) by CNT and cycloheptaamylose mixed grinding 1 hour, then gained material being added appropriate deionized water ultrasonic disperse 2 hours, centrifugation, gained precipitate with deionized water washs 2-3 time, and at 75 DEG C, vacuum drying 24 hours, are ground into powder；

(2) polyvinyl alcohol is added the deionized water of 10 times, at 45 DEG C, constant temperature stirs swelling 3 hours, is then heated to 95 DEG C of stirring to polyvinyl alcohol and is completely dissolved, then adds step (1) gained material, tea polyphenols when temperature is down to 45 DEG C, it is sufficiently stirred for, obtains coating liquid；

(3) rice straw is pulverized, with 28% ammonia mix, send in hydrothermal reaction kettle, at 200 DEG C, reaction 20 hours, are cooled to room temperature, and it is colourless for being washed with water to effluent, is dried to constant weight, obtains biomass carbon at 60 DEG C；

(4) Pericarppium arachidis hypogaeae is pulverized, mix with brown sugar, egg-shell meal, add water and make material moisture reach 40-45%, access lactic acid bacteria, ferment 7-8 hour；

(5) after biomass carbon, the carbamide respectively pulverizing of size-reduced machine, 40 mesh sieves are crossed; then the raw material that the biomass carbon after pulverizing, carbamide are not used with step (4) gained material and above-mentioned technique mixes; it is placed in granulating disc; rotary speed is adjusted to 30r/min; rotating disk inclination angle is 45 °; after material fully mixes; with aerosol apparatus, water is sprayed into mixing; the addition of water is the 14-15% of weight of material, to be formed after stop pelletize, gained material is placed in electric drying oven with forced convection; dry to constant weight at 40 DEG C; the most uniformly spray coating liquid, be dried, to obtain final product.