CN104628467A - Long-acting water-soluble fertilizer and preparation method thereof - Google Patents

Long-acting water-soluble fertilizer and preparation method thereof Download PDF

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Publication number
CN104628467A
CN104628467A CN201510035841.0A CN201510035841A CN104628467A CN 104628467 A CN104628467 A CN 104628467A CN 201510035841 A CN201510035841 A CN 201510035841A CN 104628467 A CN104628467 A CN 104628467A
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fertilizer
water
soluble
parts
long
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CN201510035841.0A
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Chinese (zh)
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CN104628467B (en
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张彬
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张彬
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    • CCHEMISTRY; METALLURGY
    • C05FERTILISERS; MANUFACTURE THEREOF
    • C05GMIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G3/00Mixtures of one or more fertilisers with additives not having a specially fertilising activity
    • CCHEMISTRY; METALLURGY
    • C05FERTILISERS; MANUFACTURE THEREOF
    • C05BPHOSPHATIC FERTILISERS
    • C05B7/00Fertilisers based essentially on alkali or ammonium orthophosphates
    • CCHEMISTRY; METALLURGY
    • C05FERTILISERS; MANUFACTURE THEREOF
    • C05GMIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G3/00Mixtures of one or more fertilisers with additives not having a specially fertilising activity
    • C05G3/80Soil conditioners

Abstract

The invention discloses a long-acting water-soluble fertilizer and a preparation method thereof. The long-acting water-soluble fertilizer contains a water-soluble nitrogenous fertilizer, a water-soluble phosphatic fertilizer, a water-soluble potash fertilizer, a biochemical fulvic acid potassium, 3, 4-dimethylpyrazole phosphate, chitosan oligosaccharide and 4-amido-1, 2, 4 triazole. The fertilizer has the advantages that the utilization rate of nitrogen phosphorus and potassium nutrients is increased, the effective period of the fertilizer is prolonged, the useless accumulation of phosphorus and potassium nutrients in soil and accumulation of nitrate in soil and fruit can be reduced, the soil is conditioned, and the disease resistance of plants is improved. The long-acting water-soluble fertilizer is simple in production process, low in cost, and beneficial for wide popularization.

Description

A kind of long-acting water-soluble fertilizer and preparation method thereof

Technical field

The present invention relates to a kind of composition, in particular to long-acting water-soluble fertilizer of one and preparation method thereof.

Background technology

Water-soluble fertilizer, owing to saving the advantages such as artificial, instant effect, is developed rapidly in China, the development trend in Ye Shi China modern agriculture chemical fertilizer recent years.Fertilizer uses by water-soluble fertilizer together with water, solves the difficult problem of applying fertilizer and must go to the field, greatly improves efficiency.But due to water-soluble fertilizer fertilizer efficiency period short, cause using frequently, namely common water-soluble fertilizer is used once for 7 ~ 10 days, each about 3 ~ 7kg/ mu, in the so short time, Crop amount is limited, but nitrogen, phosphorus, potassium nutrition is made to be accumulated in a large number in soil, cause the problems such as secondary salinization, soil compaction, soil acidification day by day serious, even there is the phenomenons such as little Lao Miao, malformed fruit, dead canopy, disease are many in some places, the quality that the nitrate of a large amount of accumulation causes veterinary antibiotics in soil declines, and has carried out risk for human body health care belt.Improve water-soluble fertilizer utilization ratio, extend the validity period of nutrient, while improving output, ensure that food safety has been the task of top priority.

Summary of the invention

The object of this invention is to provide a kind of long-acting water-soluble fertilizer, this long-acting water-soluble fertilizer can improve the utilization ratio of water-soluble fertilizer npk nutrient, extends nutrient in effective retention time of soil, absorbs for crop; Phosphorus, the potassium nutrition of accumulation in activating soil, reduce nitrate content, reduces disease incidence, uses simple, be beneficial to popularization.

To achieve these goals, the present invention takes following technical scheme:

A kind of long-acting water-soluble fertilizer, be made up by weight ratio of following raw material: 100 ~ 800 parts, water-soluble nitrogenous fertilizer, water soluble phosphorous fertilizer 100 ~ 1000 parts, water soluble potassic fertilizer 100 ~ 800 parts, 20 ~ 100 parts, biochemical fulvic acid potassium, 3, 4 dimethyl pyrazole phosphoric acid salt 0.1 ~ 3 part, oligochitosan 0.1 ~ 5 part, 4-amino-1, 2, 4 triazoles 0.1 ~ 3 part, described water-soluble nitrogenous fertilizer is urea, ammonium nitrate, ammonium sulfate, monoammonium phosphate, diammonium phosphate, one in ammonium polyphosphate or any several combination, described water soluble phosphorous fertilizer is monoammonium phosphate, diammonium phosphate, ammonium polyphosphate, potassium primary phosphate, one in dipotassium hydrogen phosphate or any several combination, described water soluble potassic fertilizer is potassium primary phosphate, dipotassium hydrogen phosphate, saltpetre, one in potassium sulfate or any several combination.

Such scheme can do following optimization, 306 parts, saltpetre, potassium primary phosphate 175 parts, monoammonium phosphate 182 parts, 300 parts, urea, 35 parts, biochemical fulvic acid potassium, 3,4 dimethyl pyrazole phosphoric acid salt 1 part, oligochitosan 0.5 part, 4-amino-1,2,4-triazoles 0.5 part.

Time prepared by above-mentioned long-acting water-soluble fertilizer, first the biochemical fulvic acid potassium of described weight is heated to 50 DEG C; Then 3 of described weight, 4 dimethyl pyrazole phosphoric acid salt, oligochitosan and 4-amino-1,2,4-triazoles are mixed, and join in biochemical fulvic acid potassium, stir and 50 DEG C of insulations 30 minutes, be then down to room temperature and transfer in stirring tank; Add the water-soluble nitrogenous fertilizer of described weight, water soluble phosphorous fertilizer and water soluble potassic fertilizer in the most backward stirring tank, stir and namely obtain long-acting water-soluble fertilizer.In above-mentioned preparation process, need to carry out under dehumidifying condition.

The fertilizer efficiency phase of the present invention obviously extends, meet crop growth needs very well, be conducive to activating soil and suppress the generation of harmful fungoid in soil, bacterium, promoting plant strain growth, improve resistance, thus reach the object of the effect that fleshes up, high utilization rate, reduction soil nitrate level.In preparation process, by 3, joining after 4 dimethyl pyrazole phosphoric acid salt, oligochitosan and 4-amino-1,2,4-triazoles mixing is heated in the biochemical fulvic acid potassium of 50 DEG C, constant temperature stirs for some time and contributes to biochemical fulvic acid potassium and fully adsorb 3,4 dimethyl pyrazole phosphoric acid salt, oligochitosan and 4-amino-1,2,4-triazoles, reduce three's loss in process of production and moisture absorption, improve composition in its entirety result of use.

Embodiment

The long-acting water-soluble fertilizer formula 1 of embodiment 1:

100 parts, water-soluble nitrogenous fertilizer, water soluble phosphorous fertilizer 100 parts, water soluble potassic fertilizer 100 parts, 20 parts, biochemical fulvic acid potassium, 3,4 dimethyl pyrazole phosphoric acid salt 0.1 part, oligochitosan 0.1 part, 4-amino-1,2,4 triazoles 0.1 part, water-soluble nitrogenous fertilizer is urea, water soluble phosphorous fertilizer is monoammonium phosphate, and water soluble potassic fertilizer is potassium primary phosphate.

The long-acting water-soluble fertilizer formula 2 of embodiment 2:

800 parts, water-soluble nitrogenous fertilizer, water soluble phosphorous fertilizer 1000 parts, water soluble potassic fertilizer 800 parts, 100 parts, biochemical fulvic acid potassium, 3,4 dimethyl pyrazole phosphoric acid salt 3 parts, oligochitosan 5 parts, 4-amino-1,2,4 triazoles 3 parts, water-soluble nitrogenous fertilizer is the mixing of the weight such as ammonium nitrate and ammonium sulfate, water soluble phosphorous fertilizer is the mixing of the weight such as diammonium phosphate, ammonium polyphosphate, and water soluble potassic fertilizer is the 1:2 mixing by weight of dipotassium hydrogen phosphate, saltpetre.

The long-acting water-soluble fertilizer formula 3 of embodiment 3:

500 parts, water-soluble nitrogenous fertilizer, water soluble phosphorous fertilizer 600 parts, water soluble potassic fertilizer 600 parts, 80 parts, biochemical fulvic acid potassium, 3,4 dimethyl pyrazole phosphoric acid salt 2 parts, oligochitosan 3 parts, 4-amino-1,2,4 triazoles 2 parts, water-soluble nitrogenous fertilizer is that urea, diammonium phosphate, ammonium polyphosphate are by weight 1:1:2 mixing, water soluble phosphorous fertilizer is the mixing of the weight such as potassium primary phosphate, dipotassium hydrogen phosphate, and water soluble potassic fertilizer is the mixing of the weight such as saltpetre, potassium sulfate.

The long-acting water-soluble fertilizer formula 4 of embodiment 4:

350 parts, water-soluble nitrogenous fertilizer, water soluble phosphorous fertilizer 480 parts, water soluble potassic fertilizer 560 parts, 65 parts, biochemical fulvic acid potassium, 3,4 dimethyl pyrazole phosphoric acid salt 1.5 parts, oligochitosan 2.7 parts, 4-amino-1,2,4 triazoles 2.2 parts, water-soluble nitrogenous fertilizer is the weight mixing such as urea, ammonium nitrate, ammonium sulfate, monoammonium phosphate, diammonium phosphate, ammonium polyphosphate, water soluble phosphorous fertilizer is the weight mixing such as monoammonium phosphate, diammonium phosphate, ammonium polyphosphate, potassium primary phosphate, dipotassium hydrogen phosphate, and water soluble potassic fertilizer is the weight mixing such as potassium primary phosphate, dipotassium hydrogen phosphate, saltpetre, potassium sulfate.

The long-acting water-soluble fertilizer formula 5 of embodiment 5:

306 parts, saltpetre, potassium primary phosphate 175 parts, monoammonium phosphate 182 parts, 300 parts, urea, 35 parts, biochemical fulvic acid potassium, 3,4 dimethyl pyrazole phosphoric acid salt 1 part, oligochitosan 0.5 part, 4-amino-1,2,4-triazoles 0.5 part.

The preparation method of embodiment 6 embodiment 1-5:

First the biochemical fulvic acid potassium of described weight is heated to 50 DEG C; Then 3 of described weight, 4 dimethyl pyrazole phosphoric acid salt, oligochitosan and 4-amino-1,2,4-triazoles are mixed, and join in biochemical fulvic acid potassium, stir and 50 DEG C of insulations 30 minutes, be then down to room temperature and transfer in stirring tank; Add the water-soluble nitrogenous fertilizer of described weight, water soluble phosphorous fertilizer and water soluble potassic fertilizer in the most backward stirring tank, stir and namely obtain long-acting water-soluble fertilizer.

Embodiment 7 the present invention is to the result of use of tomato:

1, proof test:

For embodiment 1, tomato is used.Place is in the green house of vegetables in Shouguang, Shandong.When tomato plant height is 15cm, uses the long-acting water-soluble fertilizer of 5kg according to every mu and this fertilizer is dissolved in water, until completely dissolved, use electric pump that the solution of fertilizer is squeezed into pipeline and carry out drip irrigation.Within every 25 days, use once.

2, simultaneous test 1:

In the green house of vegetables of Shouguang, Shandong, under being proof test equal conditions, apply 5kg nutrient formula be equal to (only containing and the equivalent urea in embodiment 1, equivalent monoammonium phosphate, equivalent potassium primary phosphate, and not containing all the other four kinds of compositions) common water-soluble fertilizer, within every 25 days, use once.

3, simultaneous test 2:

In the green house of vegetables of Shouguang, Shandong, under being proof test equal conditions, applying the conventional water-soluble fertilizer (urea, diammonium phosphate, dipotassium hydrogen phosphate are mixed in proportion and form) of the equal nutrient content of 7kg, within every 10 days, use once.

4, result:

The tomato of administering long-lasting water-soluble fertilizer, three days ahead of time ripe, and fruit is even, and painted good, rich in sugar, output improves 27% than simultaneous test 1, improves 13% than simultaneous test 2.The incidence of bacterial wilt reduces by 47% than simultaneous test 1 simultaneously.After treating the tomato results in three plot, take the soil sample of three plot 20cm, measure nitrate content wherein.Result shows: administering long-lasting Water soluble fertilizer plot, nitrate content is lower than simultaneous test 1 by 47%, reduces by 70% than simultaneous test 2.

Embodiment 8 the present invention is to the result of use of strawberry:

1, proof test:

For embodiment 2, in Wafangdian, Liaoning, verification experimental verification is carried out to strawberry.After strawberry emerges 20 days, use the long-acting water-soluble fertilizer of 10kg according to every mu and this fertilizer is dissolved in water, until completely dissolved, use electric pump that the solution of fertilizer is squeezed into pipeline and carry out drip irrigation.Within every 30 days, use once.

2, simultaneous test 1:

Test plot is in Wafangdian, Liaoning, by by rate of fertilizer application for 10kg/ mu by the conventional water-soluble fertilizer of equal nutrient content and nutrient composition (only containing the water-soluble nitrogenous fertilizer of the weight mixing such as the ammonium nitrate of weight described in embodiment 2 and ammonium sulfate, the water soluble phosphorous fertilizer of the weight such as diammonium phosphate, ammonium polyphosphate mixing, the water soluble potassic fertilizer of dipotassium hydrogen phosphate, saltpetre 1:2 mixing by weight), adopt pipeline drip irrigation in strawberry ground.Wherein the quality of strawberry and other production means required all consistent with proof test with management condition.Within every 30 days, use once.

3, simultaneous test 2:

Test plot in Wafangdian, Liaoning, by by rate of fertilizer application be 12kg/ mu by the conventional water-soluble fertilizer (urea, monoammonium phosphate, ammonium sulfate are mixed in proportion and form) of equal nutrient content, adopt pipeline drip irrigation in strawberry ground.Wherein the quality of strawberry and other production means required all consistent with proof test with management condition.Within every 10 days, use once.

4, result:

The plot of administering long-lasting water-soluble fertilizer, strawberry fruit is even, and color azarin, output improves 11% than simultaneous test 1, improves 6% than simultaneous test 2.Measure nitrate and the sugar content of three plot fruits after fruit harvesting: administering long-lasting Water soluble fertilizer plot, nitrate content is lower than simultaneous test 1 by 32%, reduces by 46% than simultaneous test 2; Administering long-lasting Water soluble fertilizer plot, sugar content is higher than simultaneous test 1 by 1.2%, higher than simultaneous test 2 by 0.8%.

Embodiment 9 the present invention is to the result of use of grape:

1, proof test:

For embodiment 5, Yunan border areas grape carries out proof test.At grape Post flowering, use under water-soluble for long-acting water-soluble fertilizer punching executed grapevine by 8kg according to every mu, within every 20 days, use once.

2, simultaneous test 1:

Test plot Yunan border areas vineland, the conventional water-soluble fertilizer (306 parts, saltpetre, potassium primary phosphate 175 parts, monoammonium phosphate 182 parts, 300 parts, urea) of equal volume and nutrient composition is used under water-soluble for long-acting water-soluble fertilizer punching executed grapevine by 8kg according to every mu, within every 20 days, uses once.

3, simultaneous test 2:

Test plot Yunan border areas vineland, the conventional water-soluble fertilizer (urea, ammonium sulfate, monoammonium phosphate, potassium sulfate are mixed in proportion and form) of equal nutrient content is used under water-soluble for long-acting water-soluble fertilizer punching executed grapevine by 10kg according to every mu, within every 5 days, uses once.

4, result:

The common keeping quality in plot of administering long-lasting water-soluble fertilizer is good, and grape berry size is even, and sugariness is high, and resistance against diseases is strong, wherein measures the sugar content of three pieces of ground grapes: the grape of administering long-lasting water-soluble fertilizer is higher than simultaneous test 1 by 2.1%, higher than simultaneous test 2 by 1.7%.The density of soil layer in Simultaneously test three pieces of plot 20cm: the grape of administering long-lasting water-soluble fertilizer is lower than simultaneous test 1 by 7%, lower than simultaneous test 2 by 11%.

Known above: long-acting water-soluble fertilizer compared to the water-soluble fertilizer of equal nutrient content and composition, in volume increase and improve in fruit quality and edaphic condition and all there is positive effect.

Claims (3)

1. a long-acting water-soluble fertilizer, be made up by weight ratio of following raw material: 100 ~ 800 parts, water-soluble nitrogenous fertilizer, water soluble phosphorous fertilizer 100 ~ 1000 parts, water soluble potassic fertilizer 100 ~ 800 parts, 20 ~ 100 parts, biochemical fulvic acid potassium, 3, 4 dimethyl pyrazole phosphoric acid salt 0.1 ~ 3 part, oligochitosan 0.1 ~ 5 part, 4-amino-1, 2, 4 triazoles 0.1 ~ 3 part, described water-soluble nitrogenous fertilizer is urea, ammonium nitrate, ammonium sulfate, monoammonium phosphate, diammonium phosphate, one in ammonium polyphosphate or any several combination, described water soluble phosphorous fertilizer is monoammonium phosphate, diammonium phosphate, ammonium polyphosphate, potassium primary phosphate, one in dipotassium hydrogen phosphate or any several combination, described water soluble potassic fertilizer is potassium primary phosphate, dipotassium hydrogen phosphate, saltpetre, one in potassium sulfate or any several combination.
2. long-acting water-soluble fertilizer according to claim 1, it is characterized in that being made up by weight ratio of following raw material: 306 parts, saltpetre, potassium primary phosphate 175 parts, monoammonium phosphate 182 parts, 300 parts, urea, 35 parts, biochemical fulvic acid potassium, 3,4 dimethyl pyrazole phosphoric acid salt 1 part, oligochitosan 0.5 part, 4-amino-1,2,4 triazoles 0.5 part.
3. a preparation method for long-acting water-soluble fertilizer according to claim 1 and 2, comprises the steps: first the biochemical fulvic acid potassium of described weight to be heated to 50 DEG C; Then 3 of described weight, 4 dimethyl pyrazole phosphoric acid salt, oligochitosan and 4-amino-1,2,4-triazoles are mixed, and join in biochemical fulvic acid potassium, stir and 50 DEG C of insulations 30 minutes, be then down to room temperature and transfer in stirring tank; Add the water-soluble nitrogenous fertilizer of described weight, water soluble phosphorous fertilizer and water soluble potassic fertilizer in the most backward stirring tank, stir and namely obtain long-acting water-soluble fertilizer.
CN201510035841.0A 2015-01-26 2015-01-26 A kind of long-acting water-soluble fertilizer CN104628467B (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104892166A (en) * 2015-06-01 2015-09-09 张彬 Synergistic ammonium nitrate urea-urea liquid nitrogen fertilizer
CN104945142A (en) * 2015-06-29 2015-09-30 山东卫康生物医药科技有限公司 Special chitosan oligosaccharide containing multi-trace-element foliar fertilizer for leaf vegetables and preparation method thereof
CN104961613A (en) * 2015-07-13 2015-10-07 青岛苏贝尔作物营养有限公司 Potassium nitrate-containing water soluble fertilizer and preparation method thereof
CN105016910A (en) * 2015-08-25 2015-11-04 罗跃东 Water and fertilizer integrated water-soluble fertilizer and preparation method thereof
CN105237240A (en) * 2015-11-18 2016-01-13 成都新朝阳作物科学有限公司 Water-soluble bio-organic fertilizer and preparation method thereof
CN105315109A (en) * 2015-12-04 2016-02-10 魏占波 Nutrient soil conditioning agent
CN105315111A (en) * 2015-12-04 2016-02-10 魏占波 Rhizosphere fertilizer
CN105315107A (en) * 2015-12-04 2016-02-10 魏占波 Special fertilizer suitable for acid soil
CN106518402A (en) * 2016-11-16 2017-03-22 周航 Environment-friendly fertilizer, and production method thereof
CN107285919A (en) * 2017-08-10 2017-10-24 糖化实业(上海)有限公司 A kind of multi-functional water-soluble fertilizer and application
CN108046929A (en) * 2018-01-10 2018-05-18 广西正匠农业科技有限公司 A kind of special Water soluble fertilizer of leaf vegetables and preparation method thereof

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CN102939275A (en) * 2010-04-30 2013-02-20 科奇农业服务有限公司 Reaction products and methods for making and using the same
CN103193555A (en) * 2013-04-01 2013-07-10 琼州学院 Non-metallic mineral long-acting nitrogenous fertilizer nitrification inhibitor and preparation method thereof
CN103265368A (en) * 2013-05-27 2013-08-28 中化化肥有限公司烟台作物营养与植物保护研究中心 Paste type water-soluble fertilizer with potassium fulvic acid serving as matrix
CN103332970A (en) * 2013-06-06 2013-10-02 常大勇 Method for producing functional fertilizers by comprehensive utilization of shrimp and crab shells
CN103896685A (en) * 2014-04-17 2014-07-02 张彬 Organic-inorganic water-soluble fertilizer and preparation method thereof

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* Cited by examiner, † Cited by third party
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JPH02180781A (en) * 1989-01-04 1990-07-13 Japan Tobacco Inc Fertilizer for tobacco
CN101429063A (en) * 2008-12-02 2009-05-13 王矛 Humic acid urea and method for producing the same
CN102939275A (en) * 2010-04-30 2013-02-20 科奇农业服务有限公司 Reaction products and methods for making and using the same
CN103193555A (en) * 2013-04-01 2013-07-10 琼州学院 Non-metallic mineral long-acting nitrogenous fertilizer nitrification inhibitor and preparation method thereof
CN103265368A (en) * 2013-05-27 2013-08-28 中化化肥有限公司烟台作物营养与植物保护研究中心 Paste type water-soluble fertilizer with potassium fulvic acid serving as matrix
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CN103896685A (en) * 2014-04-17 2014-07-02 张彬 Organic-inorganic water-soluble fertilizer and preparation method thereof

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104892166A (en) * 2015-06-01 2015-09-09 张彬 Synergistic ammonium nitrate urea-urea liquid nitrogen fertilizer
CN104945142A (en) * 2015-06-29 2015-09-30 山东卫康生物医药科技有限公司 Special chitosan oligosaccharide containing multi-trace-element foliar fertilizer for leaf vegetables and preparation method thereof
CN104961613A (en) * 2015-07-13 2015-10-07 青岛苏贝尔作物营养有限公司 Potassium nitrate-containing water soluble fertilizer and preparation method thereof
CN105016910A (en) * 2015-08-25 2015-11-04 罗跃东 Water and fertilizer integrated water-soluble fertilizer and preparation method thereof
CN105237240A (en) * 2015-11-18 2016-01-13 成都新朝阳作物科学有限公司 Water-soluble bio-organic fertilizer and preparation method thereof
CN105237240B (en) * 2015-11-18 2018-10-12 成都新朝阳作物科学有限公司 Water-soluble biological organic fertilizer and preparation method thereof
CN105315111A (en) * 2015-12-04 2016-02-10 魏占波 Rhizosphere fertilizer
CN105315107A (en) * 2015-12-04 2016-02-10 魏占波 Special fertilizer suitable for acid soil
CN105315109A (en) * 2015-12-04 2016-02-10 魏占波 Nutrient soil conditioning agent
CN105315111B (en) * 2015-12-04 2019-01-22 魏占波 A kind of rhizosphere fertilizer
CN106518402A (en) * 2016-11-16 2017-03-22 周航 Environment-friendly fertilizer, and production method thereof
CN107285919A (en) * 2017-08-10 2017-10-24 糖化实业(上海)有限公司 A kind of multi-functional water-soluble fertilizer and application
CN108046929A (en) * 2018-01-10 2018-05-18 广西正匠农业科技有限公司 A kind of special Water soluble fertilizer of leaf vegetables and preparation method thereof

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