CN102002369A - Method for preparing ecological agricultural water-retaining agent - Google Patents

Abstract

The invention relates to a method for preparing an ecological agricultural water-retaining agent, which comprises the following steps of: mixing raw materials such as acrylamide, acrylic acid, diammonium hydrogen phosphate, urea, humic acid, bentonite and attapulgite, performing polymerization reaction, adding an initiator, a cross-linking agent and a reaction promoter, mixing a product and a functional substance, namely the mixture of a potassium fertilizer, a nitrogen fertilizer and a phosphorus fertilizer, pelleting, drying and crushing to obtain the ecological agricultural water-retaining agent. The method for producing and applying the conventional water-retaining agent is improved, so that the water-retaining agent product has the characteristics of low cost, and salt and alkali tolerance, is environmentally-friendly, multifunctional and eutrophic, and can be applied to the agricultural production of arid zones conveniently.

Description

A kind of preparation method of ecology agriculture water-holding agent

Technical field

The invention belongs to agriculture field, be specifically related to the preparation method and the application of ecology agriculture water-holding agent.

Background technology

Over past ten years, because water-saving technology is in application in agriculture, the cultivated area of Xinjiang region (especially South Sinkiang) constantly increases, and agricultural production water is in short supply day by day, and the winter irrigation in farmland (or spring irrigation) water is wretched insufficiency, has caused the famine of abandoning that big area ploughs.Therefore, effectively reduce the irrigation quota in farmland, solve the technical bottleneck problem of water-saving agriculture, most important to accelerating development modern water-saving efficient agrotechnique.At present, external agricultural water-loss reducer product performance of producing better but cost an arm and a leg, the agricultural water-loss reducer product price of domestic production is cheap but performance is single, this makes water-holding agent be subjected to certain restriction in the arid biogeographic zone application in agriculture.

Summary of the invention

The object of the invention is, a kind of preparation method of ecology agriculture water-holding agent is provided, and this method is with the raw material propylene acid amides, vinylformic acid, Secondary ammonium phosphate, urea, humic acids, wilkinite is after Attapulgite mixes, carry out polyreaction, add initiator, linking agent and reaction promotor, again the mixture of products therefrom with functional substance potash fertilizer, nitrogenous fertilizer and phosphate fertilizer mixed granulation, drying, pulverize, can obtain the ecology agriculture water-holding agent.This method improvement the production and the application process of traditional water-holding agent, make the water-holding agent product integrated the characteristics of low cost, environmental protectionization, salt tolerant alkali, multifunctional nutrient type, be convenient in the arid biogeographic zone agriculture production, use.

The preparation method of a kind of ecology agriculture water-holding agent of the present invention follows these steps to carry out:

A, by weight percentage with raw material propylene acid amides 10-35%, vinylformic acid 25-30%, Secondary ammonium phosphate 2-5%, urea 3-5%, humic acids 5-10%, wilkinite 3-5%, Attapulgite 7-10%, be transported to the modulation reactor respectively, carry out the mixing before the polymerization after, send it in the polymerization reactor;

Behind b, the mixture feeding nitrogen with step a, add initiator ammonium persulfate salt, persulfuric acid sylvite, sodium bisulfite or potassium metabisulfite 0.25-0.35%, linking agent N, N-methylene-bisacrylamide 0.15-0.25% and reaction promotor trolamine 0.4-0.5%, 50 ℃ of temperature, time 1-3 hour, carry out slaking after the polyreaction;

C, with step b products therefrom be transported to tablets press after the mixture 19.2-24.9% of functional substance potash fertilizer, nitrogenous fertilizer and phosphate fertilizer mixes and carry out granulation, 100 ℃ of dryings of temperature are pulverized 40 orders then, can obtain the ecology agriculture water-holding agent.

Method of the present invention makes product and releases the water function except that having suction by adding functional substance (being mixed and made into by a certain amount of potash fertilizer, nitrogenous fertilizer and phosphate fertilizer), has trophic function simultaneously; Adding humic acids makes it have salt tolerant alkalescence energy; Add Attapulgite and wilkinite, to increase the gel-strength of water-holding agent suction pool.The water absorbent rate of the ecology agriculture water-holding agent that obtains by the method for the invention be 200-500 doubly, inhale the physiological saline multiplying power and be 30-60 doubly, effectively working life was greater than 5 years.The advantage of the inventive method is that cost is low, eutrophy, pollution-free, and technology simply helps industrialization production.

Embodiment

Embodiment 1

A, by weight percentage with raw material propylene acid amides 10%, vinylformic acid 30%, Secondary ammonium phosphate 5%, urea 5%, humic acids 10%, wilkinite 5%, Attapulgite 10%, be transported to the modulation reactor respectively, carry out the mixing before the polymerization after, send it in the polymerization reactor;

Behind b, the mixture feeding nitrogen with step a, add initiator ammonium persulfate salt 0.35%, linking agent N,N methylene bis acrylamide 0.25% and reaction promotor trolamine 0.5% 50 ℃ of temperature, 1 hour time, carry out slaking after the polyreaction;

C, with step b products therefrom be transported to tablets press after the mixture 24.9% of functional substance potash fertilizer, nitrogenous fertilizer and phosphate fertilizer mixes and carry out granulation, 100 ℃ of dryings of temperature are pulverized 40 orders then, can obtain the ecology agriculture water-holding agent.

Embodiment 2

A, by weight percentage with raw material propylene acid amides 35%, vinylformic acid 25%, Secondary ammonium phosphate 2%, urea 3%, humic acids 5%,, wilkinite 3%, Attapulgite 7%, be transported to the modulation reactor respectively, carry out the mixing before the polymerization after, send it in the polymerization reactor;

Behind b, the mixture feeding nitrogen with step a, add initiator and cross persulfuric acid sylvite 0.25%, linking agent N,N methylene bis acrylamide 0.15% and reaction promotor trolamine 0.4% 50 ℃ of temperature, 2 hours time, carry out slaking after the polyreaction;

C, with step b products therefrom be transported to tablets press after the mixture 19.2% of functional substance potash fertilizer, nitrogenous fertilizer and phosphate fertilizer mixes and carry out granulation, 100 ℃ of dryings of temperature are pulverized 40 orders then, can obtain the ecology agriculture water-holding agent.

Embodiment 3

A, by weight percentage with raw material propylene acid amides 18%, vinylformic acid 30%, Secondary ammonium phosphate 4%, urea 4%, humic acids 8%, wilkinite 4%, Attapulgite 9% is transported to the modulation reactor respectively, carry out the mixing before the polymerization after, send it in the polymerization reactor;

Behind b, the mixture feeding nitrogen with step a, add initiator sodium bisulfite 0.30%, linking agent N,N methylene bis acrylamide 0.20% and reaction promotor trolamine 0.5% 50 ℃ of temperature, 3 hours time, carry out slaking after the polyreaction;

C, with step b products therefrom be transported to tablets press after the mixture 22% of functional substance potash fertilizer, nitrogenous fertilizer and phosphate fertilizer mixes and carry out granulation, 100 ℃ of dryings of temperature are pulverized 40 orders then, can obtain the ecology agriculture water-holding agent.

Embodiment 4

A, by weight percentage with raw material propylene acid amides 25%, vinylformic acid 28%, Secondary ammonium phosphate 3%, urea 5%, humic acids 7%, wilkinite 3%, Attapulgite 8% is transported to the modulation reactor respectively, carry out the mixing before the polymerization after, send it in the polymerization reactor;

Behind b, the mixture feeding nitrogen, add initiator potassium metabisulfite 0.30%, linking agent N with step a, N-methylene-bisacrylamide 0.15% and reaction promotor trolamine 0.45%, 50 ℃ of temperature, 1.5 hours time, carry out slaking after the polyreaction;

C, with step b products therefrom be transported to tablets press after the mixture 20.1% of functional substance potash fertilizer, nitrogenous fertilizer and phosphate fertilizer mixes and carry out granulation, 100 ℃ of dryings of temperature are pulverized 40 orders then, can obtain the ecology agriculture water-holding agent.

The application of water-holding agent in the agricultural of Tarim River basin land for growing field crops by the method for the invention acquisition, change the spread manuer in holes mode of water-holding agent in the farmland, mode is broadcasted sowing in employing and base manure applies in the farmland simultaneously, plough then, the level land, with effectively reducing the irrigation quota in farmland, will play positive pushing effect to the arid biogeographic zone agriculture production.

With the cotton cultivation with film mulched drip irrigation pattern is example, use 10-15kg ecology agriculture water-holding agent for every mu, management process adopts ordinary method, carrying out dried broadcasting wets out, winter irrigation (or spring irrigation) next year or carried out once in 3 years, can lower the irrigation quota in farmland significantly, this all benefits for the recovery of abandoned land and the improvement of ecotope.Press the amount of application of 12.5kg/ mu, next year rises and imposes 2kg/ mu/year to replenish loss (because of this water-holding agent is seen the easy decomposition failure of light), calculate by the life cycles in 5 years, product price is by 12 yuan/kg, dropping into then is 150 yuan/mu, next year rises and drops into is 24 yuan/mu/years, is 54 yuan/mu by 5 years average annual inputs of life cycle, and this is well-adapted at arid biogeographic zone especially water-deficient area.

Claims (1)

1. the preparation method of an ecology agriculture water-holding agent is characterized in that following these steps to carrying out:

A, by weight percentage with raw material propylene acid amides 10-35%, vinylformic acid 25-30%, Secondary ammonium phosphate 2-5%, urea 3-5%, humic acids 5-10%, wilkinite 3-5%, Attapulgite 7-10%, be transported to the modulation reactor respectively, carry out the mixing before the polymerization after, send it in the polymerization reactor;

Behind b, the mixture feeding nitrogen with step a, add initiator ammonium persulfate salt, persulfuric acid sylvite, sodium bisulfite or potassium metabisulfite 0.25-0.35%, linking agent N, N-methylene-bisacrylamide 0.15-0.25% and reaction promotor trolamine 0.4-0.5%, 50 ℃ of temperature, time 1-3 hour, carry out slaking after the polyreaction;

C, with step b products therefrom be transported to tablets press after the mixture 19.2-24.9% of functional substance potash fertilizer, nitrogenous fertilizer and phosphate fertilizer mixes and carry out granulation, 100 ℃ of dryings of temperature are pulverized 40 orders then, can obtain the ecology agriculture water-holding agent.