CN1216016C - Natural plant-carrying compound nitrogen fertilizer synergistic agent - Google Patents
Natural plant-carrying compound nitrogen fertilizer synergistic agent Download PDFInfo
- Publication number
- CN1216016C CN1216016C CN03117664XA CN03117664A CN1216016C CN 1216016 C CN1216016 C CN 1216016C CN 03117664X A CN03117664X A CN 03117664XA CN 03117664 A CN03117664 A CN 03117664A CN 1216016 C CN1216016 C CN 1216016C
- Authority
- CN
- China
- Prior art keywords
- nitrogen
- nitrogen fertilizer
- plant
- leaf
- dicyanodiamide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
- Y02P60/21—Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures
Landscapes
- Fertilizers (AREA)
Abstract
The present invention relates to a compound nitrogen fertilizer synergist of a natural vegetable carrier, which is prepared from a blend of vegetality urease inhibitors of the same quality (the dry powder of lemon eucalyptus leaves, eucalyptus leaves or tea plant leaves) and a vegetality nitrification inhibitor (the dry powder of tung-nut cakes, camphortree leaves or nerium indicum leaves), boracic acid or borax, dicyanodiamine (DCD), zinc sulphate, ammonium molybdate tetrahydrate, zeolite, and the like. according to a certain proportion. The compound nitrogen fertilizer synergist can effectively delay urea conversion in soil, can reduce leaching loss generated because of nitrification when ammonium fertilizers (ammonium hydrogen carbonate, etc.) enter the soil, and can be favorable to the absorption of nitrogen element nutrients by plants. The release speed of nitrogen fertilizer (ammonium nitrogen and nitrate nitrogen) nutrients of different forms is adjusted, and thereby, the fertilizer effect period of nitrogen fertilizers is greatly prolonged. Used vegetable materials come from nature, reproducibility is strong, and resources are rich; the production cost of the compound nitrogen fertilizer synergist is low, and the compound nitrogen fertilizer synergist has the advantages of asepsis, harmlessness, safe use and simple operation, can be directly mixed and applied with various nitrogen fertilizers, can also be used as an additive for granulating compound fertilizers containing nitrogen, and can be widely popularized and used.
Description
Technical field: the present invention relates to the agrochemical technical field, particularly relate to a kind of natural plant carrier compound nitrogen fertilizer synergist.
Background technology: chemical nitrogen fertilizer occupies critical role in the chemical fertilizer that China produces and uses.Statistics shows that China's chemical nitrogen fertilizer amount of application reached 2,770 ten thousand t (pure nutrient) in 2002, accounted for 62.4% of the total consumption of chemical fertilizer (4,442 ten thousand t).But China's chemical nitrogen fertilizer utilization ratio is low for a long time, and one of the main reasons is that nutrient discharges soon, often loses by modes such as volatilization, leaching loss, denitrifications in soil.Simultaneously, single and excessive applied nitrogen makes the plant nutrition imbalance, yields poorly, poor quality, soil physico-chemical property become bad, agriculture production cost and increase.Therefore how to slow down the rate of decomposition of chemical nitrogen fertilizer in soil, improve its validity, improve utilization rate of nitrogen fertilizer, thereby reduce the chemical nitrogen fertilizer amount of application, become the long-term emphasis problem of paying close attention to both at home and abroad plant.
The main path that research both at home and abroad at present improves utilization rate of nitrogen fertilizer has two aspects: (1) produces various slow release fertilizers to chemical nitrogen fertilizer remodeling.For example coated carbamide, big grain urea, long-acting ammonium bicarbonate, urea formaldehyde (urea alienation thing), the common production cost height of this class mode, and effect is undesirable also may increase new environomental pollution source (as the coating material etc.), and its application is restricted; (2) use additive, i.e. nitrogen fertilizer potentiating agent.Comprise and add nitrification inhibitor, urease inhibitor, controlling the conversion process of different nitrogenous fertilizer in soil, and then improve utilization rate of nitrogen fertilizer, this mode is good with action effect, use the attention that advantage such as convenient is subjected to many national investigators.The nitrogen fertilizer potentiating agent kind of foreign study and application is more, based on single organic compound, as the amino of the 2-in the nitrification inhibitor-4-chloro-6-methylpyrimidine (AM), N-serve (CP), Dicyanodiamide (DCD) etc., urease inhibitor hydroquinone (HQ), O-phenyl phosphoryl diamine (PPD), N-butyl sulfo-acyl triamine (BTPT) etc.These compounds are the cost height not only, and environmental pollution is big.It is more that China continues to use external result of study the eighties in 20th century, and the research over nearly 10 years is many to be main carrier with humic acid material, adds HQ or DCD etc., what have applies for a patent, wherein HQ cost height (about 30,000 yuan/t), and may contaminate environment, application is restricted.China's plant resources is abundant, and is of a great variety, complicated component, and diverse in function, therefore screening and utilizing natural plant material is a kind of good approach as nitrogen fertilizer potentiating agent.
Summary of the invention: the object of the present invention is to provide a kind of with natural plant material be main carrier, nontoxic, cost is low, can obviously improve the natural plant carrier compound nitrogen fertilizer synergist of chemical nitrogen fertilizer utilization ratio.
Natural plant carrier compound nitrogen fertilizer synergist of the present invention is made up of plant urease inhibitor and plant-nitration inhibitor mixture, (2) boric acid or borax, (3) Dicyanodiamide (DCD), (4) zinc sulfate, (5) ammonium molybdate, (6) zeolite of quality such as (1), and its mass percent is respectively: etc. the plant urease inhibitor of quality and plant-nitration inhibitor mixture 27～45%, boric acid or borax 5～20%, Dicyanodiamide (DCD) 8～20%, zinc sulfate 5～8%, ammonium molybdate 3～5%, zeolite 7～20%.
Plant urease inhibitor of the present invention is meant Leaf of Lemon Eucalyptus, eucalyptus leaves or leaf of tea tree dry powder, and plant-nitration inhibitor is meant the seeds of a tung oil tree dregs of rice, Leaf of Camphortree or Sweetscented Oleander Leaf dry powder.The two is referred to as vegetable material.
Each component of natural plant carrier compound nitrogen fertilizer synergist of the present invention should meet following requirement: vegetable material particle diameter≤0.25mm (crossing 60 mesh sieves), and boric acid contains B 〉=17% (or borax contains B 〉=11%), and Dicyanodiamide contains (NH
2)
2CNCN 〉=95%, zinc sulfate contain Zn 〉=23%, and ammonium molybdate contains Mo 〉=49%.Zeolite particle diameter≤0.25mm (crossing 60 mesh sieves).
The preparation method of natural plant carrier compound nitrogen fertilizer synergist of the present invention is: get Leaf of Lemon Eucalyptus, eucalyptus leaves or leaf of tea tree, through air-dry levigate mistake 60 mesh sieves; Get the seeds of a tung oil tree dregs of rice, Leaf of Camphortree or Sweetscented Oleander Leaf, through air-dry levigate mistake 60 mesh sieves, quality such as two plant material are mixed, get this miscellany 27～45%, get boric acid or borax 5～20%, Dicyanodiamide (DCD) 8～20%, zinc sulfate 5～8%, ammonium molybdate 3～5%, zeolite 7～20% then, cross 60 mesh sieves respectively, abundant at normal temperatures and pressures stirring and evenly mixing promptly gets described nitrogen fertilizer potentiating agent.
The using method of natural plant carrier compound nitrogen fertilizer synergist of the present invention is: nitrogen fertilizer potentiating agent and chemical nitrogen fertilizer are pressed the certain mass mixed, can make base manure, topdress etc. used, and wherein the natural plant carrier compound nitrogen fertilizer synergist accounts for 4～8% of chemical nitrogen fertilizer purity nitrogen amount of application with addition of amount (mass ratio).
The present invention has the following advantages:
1, in this compound nitrogen fertilizer synergist, plant urease inhibitor and nitrification inhibitor can effectively delay urea and transform in soil and reduce ammonium fertilizer (bicarbonate of ammonia etc.) and enter the leaching loss that soil produces because of nitrification; Vegetable material contains multiple nutrient materials such as nitrogen, phosphorus, potassium, and trace element energy balance plant nutritions such as with addition of boron, zinc, molybdenum help plant nitrogen nutrient is absorbed simultaneously; Ammonium protective material (zeolite, DCD) can be regulated the rate of release of different shape nitrogenous fertilizer (ammonium nitrogen, nitric nitrogen) nutrient; thereby prolonged the fertilizer effectiveness phase greatly; the crop nitrogen utilization ratio improved 5～8 percentage points when equivalent was executed nitrogen, and the crop nitrogen utilization ratio improved 6～10 percentage points when decrement was executed nitrogen.(seeing experimental result for details)
2, the vegetable material that uses among the present invention also contains large amount of organic matter except that containing nutrient elements such as nitrogen, phosphorus, potassium, the structure of can improving the soil and adjusting soil organic-inorganic nutrient supply ability; Zeolite in the synergistic agent can also improve soil physical chemistry proterties and fertilizer supply and preservation ability, improves plant growth environment, promotes increasing crop yield.
3, the used vegetable material of the present invention is from natural, and reproducibility is strong, aboundresources; Products production is with low cost, and is nontoxic, safe in utilization, easy and simple to handle, can directly mix with multiple nitrogenous fertilizer and execute, and also can be used as the additive of nitrogenous granulation of compound fertilizer, can wide popularization and application.
Below be the part of test results of this synergistic agent:
Table 1 compound nitrogen fertilizer synergist is to the effect of corn yield increasing and utilization rate of nitrogen fertilizer
*(nitrogenous fertilizer is urea)
| Handle | Output (kg/ha) | Volume increase (%) | Nitrogen utilization efficiency (%) | Increase (%) |
| NPK (CK) NPK+ composite synergist A NPK+ composite synergist B NPK+ composite synergist C | 6180 6616 6580 6705 | 0 7.05 6.47 8.50 | 36.80 42.26 41.59 44.07 | 0 5.46 4.79 7.27 |
Annotate: on Chongqing region purple soil, carry out corn (kind agricultural university 108) field test, the effect of volume increase and raising utilization rate of nitrogen fertilizer.
Table 2 compound nitrogen fertilizer synergist is to the effect of increasing production of rice and utilization rate of nitrogen fertilizer
*(nitrogenous fertilizer is urea)
| Handle | Output (kg/ha) | Volume increase (%) | Nitrogen utilization efficiency (%) | Increase (%) |
| NPK (CK) NPK+ composite synergist A NPK+ composite synergist B NPK+ composite synergist C | 7185 7939 7997 7674 | 0 10.49 11.30 6.80 | 35.92 43.57 43.93 41.38 | 0 7.65 8.01 5.46 |
Annotate: purple paddy is carried out hybrid rice (hilllock excellent 22) test in a word used in place name area, north, Chongqing City, increases production and improve the effect of utilization rate of nitrogen fertilizer.
Embodiment:
Embodiment 1:
Get Leaf of Lemon Eucalyptus, through air-dry levigate mistake 60 mesh sieves; Get the seeds of a tung oil tree dregs of rice,, quality such as two plant material are mixed through air-dry levigate mistake 60 mesh sieves, get this mixture 40kg, get boric acid 15kg, Dicyanodiamide (DCD) 20kg, zinc sulfate 5kg, ammonium molybdate 4kg, zeolite 16kg then, wherein, boric acid contains B 〉=17%, and Dicyanodiamide contains (NH
2)
2CNCN 〉=95%, zinc sulfate contain Zn 〉=23%, and ammonium molybdate contains Mo 〉=49%, cross 60 mesh sieves respectively, and abundant at normal temperatures and pressures stirring and evenly mixing promptly gets described nitrogen fertilizer potentiating agent.
Embodiment 2:
Get Leaf of Lemon Eucalyptus, through air-dry levigate mistake 60 mesh sieves; Get Leaf of Camphortree,, quality such as two plant material are mixed through air-dry levigate mistake 60 mesh sieves, get this mixture 300kg, get borax 170kg, Dicyanodiamide (DCD) 200kg, zinc sulfate 80kg, ammonium molybdate 50kg, zeolite 200kg then, wherein, borax contains B 〉=11%, and Dicyanodiamide contains (NH
2)
2CNCN 〉=95%, zinc sulfate contain Zn 〉=23%, and ammonium molybdate contains Mo 〉=49%, cross 60 mesh sieves respectively, and abundant at normal temperatures and pressures stirring and evenly mixing promptly gets described nitrogen fertilizer potentiating agent.
Embodiment 3:
Get eucalyptus leaves, through air-dry levigate mistake 60 mesh sieves; Get Sweetscented Oleander Leaf,, quality such as two plant material are mixed through air-dry levigate mistake 60 mesh sieves, get this mixture 45kg, get boric acid 18kg, Dicyanodiamide (DCD) 10kg, zinc sulfate 6kg, ammonium molybdate 3kg, zeolite 18kg then, wherein, boric acid contains B 〉=17%, and Dicyanodiamide contains (NH
2)
2CNCN 〉=95%, zinc sulfate contain Zn 〉=23%, and ammonium molybdate contains Mo 〉=49%, cross 60 mesh sieves respectively, and abundant at normal temperatures and pressures stirring and evenly mixing promptly gets described nitrogen fertilizer potentiating agent.
Embodiment 4:
Get leaf of tea tree, through air-dry levigate mistake 60 mesh sieves; Get the seeds of a tung oil tree dregs of rice,, quality such as two plant material are mixed through air-dry levigate mistake 60 mesh sieves, get this mixture 450kg, get borax 100kg, Dicyanodiamide (DCD) 150kg, zinc sulfate 80kg, ammonium molybdate 50kg, zeolite 170kg then, wherein, borax contains B 〉=11%, and Dicyanodiamide contains (NH
2)
2CNCN 〉=95%, zinc sulfate contain Zn 〉=23%, and ammonium molybdate contains Mo 〉=49%, cross 60 mesh sieves respectively, and abundant at normal temperatures and pressures stirring and evenly mixing promptly gets described nitrogen fertilizer potentiating agent.
Embodiment 5:
Get eucalyptus leaves, through air-dry levigate mistake 60 mesh sieves; Get Leaf of Camphortree,, quality such as two plant material are mixed through air-dry levigate mistake 60 mesh sieves, get this mixture 27kg, get boric acid 20kg, Dicyanodiamide (DCD) 20kg, zinc sulfate 8kg, ammonium molybdate 5kg, zeolite 20kg then, wherein, boric acid contains B 〉=17%, and Dicyanodiamide contains (NH
2)
2CNCN 〉=95%, zinc sulfate contain Zn 〉=23%, and ammonium molybdate contains MO 〉=49%, cross 60 mesh sieves respectively, and abundant at normal temperatures and pressures stirring and evenly mixing promptly gets described nitrogen fertilizer potentiating agent.
Embodiment 6:
Get eucalyptus leaves, through air-dry levigate mistake 60 mesh sieves; Get the seeds of a tung oil tree dregs of rice,, quality such as two plant material are mixed through air-dry levigate mistake 60 mesh sieves, get this mixture 45kg, get boric acid 5kg, Dicyanodiamide (DCD) 19kg, zinc sulfate 7kg, ammonium molybdate 4kg, zeolite 20kg then, wherein, boric acid contains B 〉=17%, and Dicyanodiamide contains (NH
2)
2CNCN 〉=95%, zinc sulfate contain Zn 〉=23%, and ammonium molybdate contains MO 〉=49%, cross 60 mesh sieves respectively, and abundant at normal temperatures and pressures stirring and evenly mixing promptly gets described nitrogen fertilizer potentiating agent.
Embodiment 7:
Get leaf of tea tree, through air-dry levigate mistake 60 mesh sieves; Get Sweetscented Oleander Leaf, through air-dry levigate mistake 60 mesh sieves, quality such as two plant material are mixed, get this mixture 4400kg, get boric acid 2000kg, Dicyanodiamide (DCD) 800kg, zinc sulfate 600kg, ammonium molybdate 300kg, zeolite 1900kg then, wherein, boric acid contains B 〉=17%, and Dicyanodiamide contains (NH
2)
2CNCN 〉=95%, zinc sulfate contain Zn 〉=23%, and ammonium molybdate contains Mo 〉=49%, cross 60 mesh sieves respectively, and abundant at normal temperatures and pressures stirring and evenly mixing promptly gets described nitrogen fertilizer potentiating agent.
Embodiment 8:
Get Leaf of Lemon Eucalyptus, through air-dry levigate mistake 60 mesh sieves; Get Sweetscented Oleander Leaf, through air-dry levigate mistake 60 mesh sieves, quality such as two plant material are mixed, get this mixture 4500kg, get borax 1900kg, Dicyanodiamide (DCD) 1800kg, zinc sulfate 600kg, ammonium molybdate 500kg, zeolite 700kg then, wherein, borax contains B 〉=11%, and Dicyanodiamide contains (NH
2)
2CNCN 〉=95%, zinc sulfate contain Zn 〉=23%, and ammonium molybdate contains Mo 〉=49%, cross 60 mesh sieves respectively, and abundant at normal temperatures and pressures stirring and evenly mixing promptly gets described nitrogen fertilizer potentiating agent.
Claims (1)
1, a kind of natural plant carrier compound nitrogen fertilizer synergist, it is characterized in that, plant urease inhibitor and plant-nitration inhibitor mixture, (2) boric acid or borax, (3) Dicyanodiamide DCD, (4) zinc sulfate, (5) ammonium molybdate, (6) zeolite by quality such as (1) are formed, its mass percent is respectively: etc. the plant urease inhibitor of quality and plant-nitration inhibitor mixture 27～45%, boric acid or borax 5～20%, Dicyanodiamide DCD8～20%, zinc sulfate 5～8%, ammonium molybdate 3～5%, zeolite 7～20%, wherein:
Plant urease inhibitor is meant Leaf of Lemon Eucalyptus, eucalyptus leaves or leaf of tea tree dry powder, and plant-nitration inhibitor is meant the seeds of a tung oil tree dregs of rice, Leaf of Camphortree or Sweetscented Oleander Leaf dry powder;
Each component should meet following requirement: vegetable material particle diameter≤0.25mm, boric acid contain B 〉=17% or borax contains B 〉=11%, and Dicyanodiamide contains (NH
2)
2CNCN 〉=95%, zinc sulfate contain Zn 〉=23%, and ammonium molybdate contains Mo 〉=49%, zeolite particle diameter≤0.25mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN03117664XA CN1216016C (en) | 2003-04-08 | 2003-04-08 | Natural plant-carrying compound nitrogen fertilizer synergistic agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN03117664XA CN1216016C (en) | 2003-04-08 | 2003-04-08 | Natural plant-carrying compound nitrogen fertilizer synergistic agent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1454880A CN1454880A (en) | 2003-11-12 |
| CN1216016C true CN1216016C (en) | 2005-08-24 |
Family
ID=29260168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN03117664XA Expired - Fee Related CN1216016C (en) | 2003-04-08 | 2003-04-08 | Natural plant-carrying compound nitrogen fertilizer synergistic agent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1216016C (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2011265399B2 (en) * | 2004-02-09 | 2015-01-22 | Ballance Agri-Nutrients Limited | Fertilizer Compositions |
| WO2005075602A1 (en) * | 2004-02-09 | 2005-08-18 | Ballance Agri-Nutrients Limited | Fertilizer compositions |
| ES2264386B1 (en) * | 2005-06-07 | 2007-11-16 | Inabonos, S.A. | NEW FORMULATIONS WITH THE CAPACITY OF INHIBITING UREASA ACTIVITY AND POTENTIAL AGRONOMIC USE. |
| US7666241B2 (en) * | 2007-01-24 | 2010-02-23 | Specialty Fertilizer Products, Llc | Fertilizer-polymer mixtures which inhibit nitrification in soils |
| CN102584480B (en) * | 2012-04-01 | 2014-03-12 | 廊坊北鑫化工有限公司 | Colloidal suspension agent for nitrogen fertilizer synergism and application thereof |
| CN102835232B (en) * | 2012-07-30 | 2014-03-12 | 湖南农业大学 | Method for increasing nitrogen utilization efficiency of rape |
| CN103936493B (en) * | 2013-01-21 | 2016-05-18 | 河北农业大学 | Slow-release long-acting compound fertilizer and preparation method thereof |
| CN103130570A (en) * | 2013-02-27 | 2013-06-05 | 中国热带农业科学院橡胶研究所 | Method for preparing composite nitrogen fertilizer synergistic agent PBP by using banana pseudo-stem, and PBP application method |
| CN105027885B (en) * | 2015-06-25 | 2018-03-09 | 三亚新大兴园林生态有限公司 | It is a kind of to cover green method using the progress sylvan life of short leaf broomcorn millet |
| CN110683890A (en) * | 2019-11-22 | 2020-01-14 | 济南启源信息科技有限公司 | Efficient nitrogen fertilizer synergist for rice planting and application of efficient nitrogen fertilizer synergist for rice planting |
| CN114573398B (en) * | 2022-04-06 | 2023-07-25 | 南昌工程学院 | Organic fertilizer for reducing nitrate content of lettuce leaves and preparation method thereof |
-
2003
- 2003-04-08 CN CN03117664XA patent/CN1216016C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1454880A (en) | 2003-11-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102219604B (en) | Rice charcoal slow-release fertilizer and preparation method thereof | |
| CN101434502B (en) | Synergistic slow release nitrogen fertilizer and preparation thereof | |
| CN105294363A (en) | Formula and film-coating preparation method for biological carbon coated urea | |
| CN1216016C (en) | Natural plant-carrying compound nitrogen fertilizer synergistic agent | |
| CN1990431A (en) | Slow release long-acting inorganic complex blending fertilizer | |
| CN101434503A (en) | Synergistic slow release urea fertilizer and preparation thereof | |
| CN1084320C (en) | Long-lasting special-purpose compound mixed fertilizer for corn and rice | |
| CN102786346B (en) | Synergistic slow-release urea fertilizer and preparation method thereof | |
| CN102887794A (en) | Nitrogen-phosphorus-potassium high-concentration liquid fertilizer containing synergist and preparation method thereof | |
| CN103992193A (en) | Long-acting and slow-release blended fertilizer special for tomatoes | |
| CN103664369A (en) | Synergism and lost control fertilizer and preparation method thereof | |
| CN112374950A (en) | Nitrogen fertilizer synergist containing plant-derived denitrification inhibitor and preparation method and application thereof | |
| CN1169758C (en) | Long-acting water-retaining complex fertilizer and its preparation method and special-purpose equipment | |
| CN113024328A (en) | Application of compound containing 2-cyclopentenone as synergist of nitrogen-containing fertilizer | |
| CN1255473A (en) | Slowly-releasing long-acting agent for compound (mixed) fertilizer | |
| CN1087724C (en) | Complete element compound fertilizer for garden | |
| CN103483046A (en) | Special crop fertilizer | |
| CN107056396A (en) | A kind of compound amino acid fertilizer and preparation method thereof | |
| CN102924175B (en) | Lignin-containing organic-inorganic compound fertilizer prepared by ammonia-acid method as well as ammonia-acid production method | |
| CN101844948A (en) | Use of natural azadirachtin plant material as nitrogen fertilizer synergist | |
| CN1227978C (en) | Leaf vegetable nitrate composite control agent | |
| CN1580009A (en) | Special long-lasting fertilizer for crops | |
| CN105481590A (en) | Special humic acid compound fertilizer suitable for apples in loess plateau areas and preparation method of special humid acid compound fertilizer | |
| CN1233601C (en) | Production method of multi-nutrient green manure of controlling releasing | |
| CN1296328C (en) | Slow release long-acting urea and its preparation and uses |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050824 |