CN109734499A - A kind of cucumber seedling-raising controlled-releasing compounding fertilizer and preparation method thereof - Google Patents
A kind of cucumber seedling-raising controlled-releasing compounding fertilizer and preparation method thereof Download PDFInfo
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- CN109734499A CN109734499A CN201910166362.0A CN201910166362A CN109734499A CN 109734499 A CN109734499 A CN 109734499A CN 201910166362 A CN201910166362 A CN 201910166362A CN 109734499 A CN109734499 A CN 109734499A
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Abstract
The invention discloses a kind of cucumber seedling-raising controlled-releasing compounding fertilizers and preparation method thereof, are grouped as by the group of following parts by weight: 10-12 parts of coated carbamide, 2-4 parts of ammonium nitrate phosphorus, 3-4 parts of phosphate fertilizer and 3 parts of potash fertilizer；Coated carbamide is made of urea and coated fertilizer, and the mass percentage of N is 44% in coated carbamide, and preliminary solubility is greater than 0 less than 2%, and fertilizer releasing period is 40-50 days；The mass percentage of N is 30%-32%, P in ammonium nitrate phosphorus in ammonium nitrate phosphorus2O5Mass percentage be 4%-6%.The present invention is using coated release-controlled urea as Nitrogen supplying main body, suitable ammonium nitrate phosphorus, phosphate fertilizer and potash fertilizer is added, keep nutrient supply synchronous with the nutrient demand during cucumber seedling-raising, while stimulating cucumber seedling root growth and development, the controlled release nitrogen not discharged when transplanting is retained in rhizosphere, meet the needs of root system of plant is to nutrient after transplanting, reaches slow seedling in advance, promote the purpose of plant strain growth.
Description
Technical field
The invention belongs to agricultural plantation technology fields, and in particular to a kind of cucumber seedling-raising controlled-releasing compounding fertilizer and its preparation side
Method.
Background technique
Cucumber is important vegetable crop, occupies an important position in China's vegetable growing.China's cucumber cultivation has
Cultivated area is big, the feature that form is more, total output is high.Culturing and transplanting seedlings make full use of the season of growth with it, shift to an earlier date growing process, close
The advantages that planting full stand is widely used in China's cucumber production.It is long before cucumber seedling transplanting in cucumber seedling-raising transplanting production system
Gesture is weak, and root system development is bad, and plant is not healthy and strong；Root system damage is serious when transplanting, and the absorption of plant pair moisture and nutrient is difficult, leads
It causes transplanting seedling time after transplanting long, restores slow, be two major reasons for influencing cucumber field growing and yield.Solve this topic
Key be: on the one hand, phenomena such as nursery stage is focused on supporting root, and root is good, robust seedling, and cucumber is then not in long potential difference, slow seedling is slow,
Be conducive to improve disease-resistant, the insect resistace of plant, lay a good foundation for later period high yield；On the other hand, after transplanting near root system
(i.e. rhizosphere) keeps suitable nutrient density, is conducive to improve the biological effectiveness that plant absorbs nutrient, reaches quick slow seedling
Purpose.
Nursery stage asks that nutrient supply concentration and nutrient form directly affect the upgrowth situation of cucumber seedling, and further influences
The growth and development of plant, yield and fruit quality after transplanting.Under suitable nutrient density, seedling can be with robust growth: nutrient is dense
Height is spent, " burn seedlings " phenomenon can be generated；Too low then seedling development is bad.In general, the nitrogen shape that crop can be absorbed and utilized
There are many states, but from the point of view of nutrition angle, NH4 +And NO3 -It is the main nitrogen that root system of plant is directly absorbed and utilized.Have and grinds
Study carefully and shows under a certain concentration, NH4+The starting that lateral-root primordia can be stimulated to develop, NO3 -It can promote the elongation of lateral root, NH4 +And NO3 -
Cooperating, which can induce plant, forms biggish root system.It can be seen that the growth and development of root system of plant and building up by nutrient for form
The regulation of form and feed consistency.Adjust NH4 +And NO3 -Dosage and proportion can become regulation the cucumber seedling-raising phase in seedling on the ground
The important channel in portion and root growth.
Rhizosphere fertilization i.e. fertilizer application near root system of plant region, be regulate and control the micro- domain environment nutrient shape of crop rhizosphere
Condition, the biological effectiveness for improving nutrient, improve the important measures of plant recovery of nutrient.The cultivation feature in school is moved according to cucumber seedling-raising,
The nutrient in nursery stage can be carried along into crop field with transplanting, be to realize the supply of nutrient rhizosphere, improve the important way of plant recovery of nutrient
Diameter.Find that traditional seedling raising manners are using instant nitrogenousfertilizer as educating to using the result of study of different seedling medium culture cucumber seedlings
Seedling medium is added in seedling nitrogen source, and under safety using amount, when seedling replanting, few inorganic monomeric aluminums therefore were difficult to shifting in matrix
The raw straight crop rhizosphere early period nitrogen high intensity in field is without interruption after cultivation.The nutrient release rate of release and release control fertilizer and release time
With Modulatory character, the rhizosphere regulation for nitrogen after transplanting provides possibility.
A kind of cucumber seedling-raising substrate of Chinese patent 10136439.9 (2010) Patent Publication and preparation method thereof, by vegetables
Stubble compost product, turf and vermiculite composition.With conventional seedbed system discrete phase ratio, which reduces the usage amount of turf,
Be conducive to save and use turf resource.But the seedling medium can not be by promoting the morphology of cucumber seedling root system to build up and move
The holding of rhizosphere nitrogen concentration forms strong sprout after cultivation, shortens transplanting seedling time.
Cucumber seedling-raising controlled-releasing compounding fertilizer of the invention can promote the growth of cucumber seedling root system, while fail to release in nursery stage
It can be carried along into crop field when the controlled release nitrogen transplanting put, so that plant rhizosphere is kept suitable Different Nitrogen Concentration, promote plant strain growth, have
Conducive to slow seedling ahead of time.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of cucumber seedling-raising controlled-releasing compounding fertilizers and preparation method thereof.
To achieve the above object, the invention provides the following technical scheme:
A kind of cucumber seedling-raising controlled-releasing compounding fertilizer, is grouped as by the group of following parts by weight:
10-12 parts of coated carbamide, 2-4 parts of ammonium nitrate phosphorus, 3-4 parts of phosphate fertilizer and 3 parts of potash fertilizer；
The coated carbamide is made of urea and coated fertilizer, and the coated fertilizer is polyurethane, the weight of the polyurethane
Average molecular weight is 30000-100000, and the mass percentage of N is 44% in the coated carbamide, and it is small that preliminary solubility is greater than 0
In 2%, fertilizer releasing period is 40-50 days；
The mass percentage of N is 30%-32%, P in the ammonium nitrate phosphorus in the ammonium nitrate phosphorus2O5Quality percentage
Content is 4%-6%.
Further, it is grouped as by each group of following parts by weight: 12 parts of coated carbamide, 2 parts of ammonium nitrate phosphorus, weight peroxophosphoric acid
4 parts and 3 parts of potassium sulfate of calcium.
Further, the phosphate fertilizer is double superhosphate, P in the phosphate fertilizer2O5Mass percentage be 40%-44%；
The potash fertilizer is potassium sulfate, K in the potash fertilizer2The mass percentage of O is 50%-52%.
Further, the particle diameter of the coated carbamide, the ammonium nitrate phosphorus, the phosphate fertilizer and the potash fertilizer is
3.0-4.0 millimeter.
Further, in the cucumber seedling-raising controlled-releasing compounding fertilizer, the mass percentage of N is 27%-28%, P2O5Matter
Amount percentage composition is 7%, K2The mass percentage of O is 8%-9%.
Further, the weight average molecular weight of the polyurethane is 65000.
Further, the preliminary solubility of the coated carbamide is 1.90%, and the fertilizer releasing period of the coated carbamide is
46 days.
Further, the mass percentage of N is 32% in the ammonium nitrate phosphorus；P in the ammonium nitrate phosphorus2O5Quality
Percentage composition is 4%；P in the phosphate fertilizer2O5Mass percentage be 40%；K in the potash fertilizer2The mass percentage of O is
52%.
Another purpose according to the present invention, the present invention provide a kind of preparation side of above-mentioned cucumber seedling-raising controlled-releasing compounding fertilizer
Method includes the following steps:
By 10-12 parts of coated carbamide, 2-4 parts of ammonium nitrate phosphorus, 3-4 parts of phosphate fertilizer and 3 parts of potash fertilizer mixings, cucumber seedling-raising control is obtained
Release compound fertilizer.
Further, by 12 parts of coated carbamide, 2 parts of ammonium nitrate phosphorus, 4 parts of phosphate fertilizer and 3 parts of potash fertilizer mixings, cucumber seedling-raising is obtained
Controlled-releasing compounding fertilizer.
Compared with prior art, the beneficial effects of the present invention are:
1, a kind of cucumber seedling-raising controlled-releasing compounding fertilizer of the present invention is moved for cucumber seedling present in cucumber seedling-raising transplanting system
Growing way is weak before planting, and root system development is bad, and root system damage is serious when plant is not healthy and strong and transplants, the absorption of plant pair moisture, nutrient
Difficulty causes transplanting seedling time after transplanting long, restores the slow major issue for waiting two to influence cucumber field growing and yield, according to Huang
The nitrogen nutrient release rule of nutrient demand feature and control release urea during melon nursery, using coated release-controlled urea as Nitrogen supplying
Suitable ammonium nitrate phosphorus, phosphate fertilizer and potash fertilizer is added in main body, keeps nutrient supply synchronous with the nutrient demand during cucumber seedling-raising,
While stimulating cucumber seedling root growth and development, the controlled release nitrogen that when transplanting does not discharge is retained in rhizosphere, plants after meeting transplanting
Demand of the object root system to nutrient promotes the purpose of plant field growing to reach slow seedling in advance.
2, a kind of cucumber seedling-raising controlled-releasing compounding fertilizer of the present invention, is added to ammonium nitrate phosphorus, wherein NH4 +- N and NO3 -The matter of-N
Measuring percentage to contain most is respectively 16% and 14%, NH4 +- N and NO3 -The ratio of-N is 1: 0.88, close to 1: 1, to cucumber in nursery stage
The root system of seedling has apparent stimulation, promotes root growth, forms healthy and strong seedling.When transplanting, it may be damaged by machinery
The ratio of the root system of wound is reduced, and the quantity of healthy and strong root system increases, and is conducive to shorten transplanting seedling time.
3, a kind of cucumber seedling-raising controlled-releasing compounding fertilizer of the present invention, is added to coated release-controlled urea, control release urea is released during nursery
Nitrogen in the nitrogen put and ammonium nitrate phosphorus cooperates, and can meet the nitrogen nutrient demand of cucumber seedling, when transplanting, can also carry portion
The controlled release nitrogen not discharged in nursery stage is divided to enter crop field, the nitrogen concentration for maintaining rhizosphere suitable improves the biological effectiveness of nitrogen,
Promote field plant growth, achievees the purpose that slow seedling ahead of time.
4, a kind of cucumber seedling-raising controlled-releasing compounding fertilizer of the present invention contains N:27%-28%, P in complex fertilizer2O5: 7%, K2O:
8%-9%, N:P2O5: K2O ratio is 1.00: 0.25: 0.32, and according to the Characteristics of releasing nutrition of controlled release nitrogen, which can
Meet the needs of cucumber seedling-raising phase, realizes the balance supply of nursery stage nitrogen, phosphorus, potassium.
5, a kind of cucumber seedling-raising controlled-releasing compounding fertilizer of the present invention, complex fertilizer are finished product bulk blended fertilizer, and application is convenient, is beneficial to
Peasant saving of labor, it is time saving, increase production, increase income.
6, a kind of cucumber seedling-raising controlled-releasing compounding fertilizer of the present invention is theoretical branch with the physiological function of different form nitrogen nutrient
Support, combines with the controlled-release technology of nitrogen nutrient, comprehensively considers the nursery control that the nutrient demand in the cucumber seedling-raising phase designs
Complex fertilizer is released, has achieved the purpose that nitrogen emergency is mutually helped, phosphorus potassium balance is supplied, has promoted plant root growth during nursery,
Healthy and strong seedling is formed, while reducing root system damage when shifting is looked for, realizes the raising of the biological effectiveness with fertilizer transplanting and nitrogen,
Transplanting seedling time is shortened, this is conducive to the field growing of plant, improves the yield and quality.The present invention provides province for cucumber seedling-raising
When, saving of labor, safe and environment-friendly dedicated fertilizer, practical application value with higher, wide market.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical scheme in the embodiment of the invention is clearly and completely described,
Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the scope of protection of the invention.
The present invention the following technical schemes are provided:
Embodiment 1
The preparation of cucumber seedling-raising controlled-releasing compounding fertilizer
1) determination of cucumber seedling-raising controlled-releasing compounding fertilizer acquisition time and each component
According to the growth characteristic of transplanting cucumber, the nursery stage is 3-4 weeks, and slow seedling to field fertility (is bloomed early period after transplanting
Phase beginning) about 3 weeks or so, determine that the acquisition time of control release urea is 40-50 days；
It is tested by ammonium nitrate phosphorus different amounts, to promote root growth, the minimum amount for forming healthy and strong seedling determines nitre
Sour ammonium phosphorus dosage；
It is tested by controlled release nitrogen different amounts, to form the safe controlled release Nitrogen Amount of maximum and ammonium nitrate of healthy and strong seedling
The minimum amount of phosphorus determines control release urea dosage；
Phosphate fertilizer in complex fertilizer, Potassium Fertilizer are determined according to the demand of nursery stage phosphorus, potassium, and nursery controlled release is determined with this
The parts by weight and nutrient content of compound fertilizer each component.
Embodiment 2
The preparation of cucumber seedling-raising controlled-releasing compounding fertilizer
By coated carbamide, (nitrogen content of the coated carbamide is 44%；Fertile core is common urea, and coated fertilizer is Weight-average molecular
The polyethylene that amount is 65000, preliminary solubility 1.90%, acquisition time are 46 days；The coated carbamide can have in pioneering new-type fertilizer
Limit company or the purchase of large group, Nintaus) 12 parts, (mass percentage of N is 32%, P to ammonium nitrate phosphorus2O5Mass percentage
It is 4%) 2 parts, particle double superhosphate (P in the phosphate fertilizer2O5Mass percentage be 40%) 4 parts, granular potassium sulfate (K2O's
Mass percentage is 52%) to be uniformly mixed so as to obtain fertilizer product for 3 parts.
In prepared nursery controlled-releasing compounding fertilizer nutrient content, the mass percentage of N is 28%, P2O5Quality percentage contain
Amount is 8%, K2The mass percentage of O is 9%, and each component particle diameter is 3.0-4.0mm.
Embodiment 3
The preparation of cucumber seedling-raising controlled-releasing compounding fertilizer
By coated carbamide, (nitrogen content of the coated carbamide is 44%；Fertile core is common urea, and coated fertilizer is Weight-average molecular
The polyethylene that amount is 30000, preliminary solubility 0.1%, acquisition time are 40 days；The coated carbamide can be limited in pioneering new-type fertilizer
Company or the purchase of large group, Nintaus) 10 parts, (mass percentage of N is 30%, P to ammonium nitrate phosphorus2O5Mass percentage be
5%) 2 parts, particle double superhosphate (P in the phosphate fertilizer2O5Mass percentage be 40%) 2 parts, granular potassium sulfate (K2The matter of O
Amount percentage composition is 51%) to be uniformly mixed so as to obtain fertilizer product for 3 parts.
In prepared nursery controlled-releasing compounding fertilizer nutrient content, the mass percentage of N is 28%, P2O5Quality percentage contain
Amount is 8%, K2The mass percentage of O is 9%, and each component particle diameter is 3.5mm.
Embodiment 4
By coated carbamide, (nitrogen content of the coated carbamide is 44%；Fertile core is common urea, and coated fertilizer is Weight-average molecular
The polyethylene that amount is 100000, preliminary solubility 1.0%, acquisition time are 50 days；The coated carbamide can have in pioneering new-type fertilizer
Limit company or the purchase of large group, Nintaus) 12 parts, (mass percentage of N is 31%, P to ammonium nitrate phosphorus2O5Mass percentage
It is 6%) 4 parts, particle double superhosphate (P in the phosphate fertilizer2O5Mass percentage be 44%) 4 parts, granular potassium sulfate (K2O's
Mass percentage is 52%) to be uniformly mixed so as to obtain fertilizer product for 3 parts.
In prepared nursery controlled-releasing compounding fertilizer nutrient content, the mass percentage of N is 27%, P2O5Quality percentage contain
Amount is 7%, K2The mass percentage of O is 8%, and each component particle diameter is 4.0mm.
Embodiment 5
The effect detection of cucumber seedling-raising controlled-releasing compounding fertilizer
1) nursery effect detects
In Liaocheng University's heliogreenhouse, seedling growth test is carried out using the controlled-releasing compounding fertilizer of embodiment 1-4 preparation.
Test uses the alms bowl nursery of 9cm × 9cm basin, with turfy soil: vermiculite (2: 1) is seedling medium, every alms bowl matrix useful load
200ml, controlled-releasing compounding fertilizer processing press 300mg N plants-1Dose is counted, is control (phosphorus, potassium application rate and controlled release compound with traditional nursery
Fertilizer processing it is identical), by Relative water content 60%-90% carry out water management, nursery stage 27 days.
Acquired results are as shown in table 1, and compared with traditional nursery, the cucumber cultivated using nursery controlled-releasing compounding fertilizer of the present invention is young
Seedling plant height, stem thickness averagely increase separately 3.3cm, 0.076cm, plantlet of transplant phase root long, root surface area averagely increase by 23%,
35%, the newest expansion blade leaf area of plant and SPAD value (chlorophyll content) are also apparently higher than control.
Table 1, cucumber seedling transplanting time plant growth condition
2) transplanting time matrix nutrient carrying amount detects
In above-mentioned seedling growth test, when culturing and transplanting seedlings, controlled-releasing compounding fertilizer processing and each 4 alms bowl of traditional nursery is randomly selected, is surveyed
Determine matrix inorganic nitrogen residual quantity；Choose coated carbamide particle respectively in controlled-releasing compounding fertilizer processing, is washed with deionized water coating
Surface, measurement controlled release nitrogen residual quantity (i.e. transplanting carries controlled release nitrogen amount).
Specific assay method is as follows: the coated carbamide chosen and cleaned being ground, is settled to 100ml with deionized water, is inhaled
Take 0.5ml, Kjeldahl nitrogen determination nitrogen residue amount.
Through detecting, the every alms bowl inorganic monomeric aluminum amount 1.9mg of conventional process, substantially without nitrogen residue in matrix when transplanting:
Nursery controlled-releasing compounding fertilizer of the present invention handles nitrogen residue total amount 180.2mg alms bowl-1, wherein controlled release nitrogen residual quantity accounts for 67.6%
(as shown in table 2), the nutrient for meeting cucumber seedling-raising transplanting carry design requirement.
Table 2, cucumber seedling transplanting time matrix Nitrogen Status
3) crop field effect detection after transplanting
In Liaocheng University's agricultural experiment station, using in above-mentioned seedling growth test controlled-releasing compounding fertilizer and traditional seedling raising manners cultivate
Cucumber seedling carry out respectively field trial transplanting compliance test result.
Test includes traditional nursery, 2 kinds of controlled-releasing compounding fertilizer nursery from seedling mode and not nitrogen fertilizer applications (Nno), traditional nitrogen pipe
Manage (Ncon:150kg N hm-2Do base manure application) 2 kinds of fertilization modes, using the complete scheme of 2 × 2 factors, RANDOMIZED BLOCK DESIGN,
4 processing, 3 repetitions, planting density 50cm × 30cm, plot area 6.7m are set altogether2, slow seedling situation and beginning after observation transplanting
The growing state at florescence.
The result shows that: compared with tradition is from seedling, in not nitrogen fertilizer application and two kinds of nitrogen management of tradition, controlled-releasing compounding fertilizer
Nursery processing averagely can shift to an earlier date transplanting seedling time 2.2 days and 1.5 days respectively, improve plant the plant height 6.5cm and 4.3cm of early flowering season,
Stem thickness, the number of blade and blade SPAD value are also significantly increased.Prove that controlled release nursery compound fertilizer of the present invention can shift to an earlier date slow seedling,
Promote cucumber early growth, in advance growing process.
Finally, it should be noted that these are only the preferred embodiment of the present invention, it is not intended to restrict the invention, although
Present invention has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, still can be right
Technical solution documented by foregoing embodiments is modified or equivalent replacement of some of the technical features.It is all
Within the spirit and principles in the present invention, any modification, equivalent replacement, improvement and so on should be included in protection of the invention
Within the scope of.
Claims (10)
1. a kind of cucumber seedling-raising controlled-releasing compounding fertilizer, it is characterised in that: be grouped as by the group of following parts by weight:
10-12 parts of coated carbamide, 2-4 parts of ammonium nitrate phosphorus, 3-4 parts of phosphate fertilizer and 3 parts of potash fertilizer；
The coated carbamide is made of urea and coated fertilizer, and the coated fertilizer is polyurethane, and the polyurethane is divided equally again
Son amount is 30000-100000, and the mass percentage of N is 44% in the coated carbamide, and preliminary solubility is greater than 0 and is less than
2%, fertilizer releasing period is 40-50 days；
The mass percentage of N is 30%-32%, P in the ammonium nitrate phosphorus in the ammonium nitrate phosphorus2O5Mass percentage
For 4%-6%.
2. a kind of cucumber seedling-raising controlled-releasing compounding fertilizer according to claim 1, which is characterized in that by each of following parts by weight
Group is grouped as: 12 parts of coated carbamide, 2 parts of ammonium nitrate phosphorus, 4 parts of phosphate fertilizer and 3 parts of potash fertilizer.
3. a kind of cucumber seedling-raising controlled-releasing compounding fertilizer according to claim 1, which is characterized in that the phosphate fertilizer is attached most importance to peroxophosphoric acid
Calcium, P in the phosphate fertilizer2O5Mass percentage be 40%-44%；The potash fertilizer is potassium sulfate, K in the potash fertilizer2The matter of O
Amount percentage composition is 50%-52%.
4. a kind of cucumber seedling-raising controlled-releasing compounding fertilizer according to claim 1, which is characterized in that the coated carbamide, described
The particle diameter of ammonium nitrate phosphorus, the phosphate fertilizer and the potash fertilizer is 3.0-4.0 millimeters.
5. a kind of cucumber seedling-raising controlled-releasing compounding fertilizer according to claim 3, which is characterized in that the cucumber seedling-raising controlled release is multiple
In complex fertilizer, the mass percentage of N is 27%-28%, P2O5Mass percentage be 7%, K2The mass percentage of O is
8%-9%.
6. a kind of cucumber seedling-raising controlled-releasing compounding fertilizer according to claim 1 again, which is characterized in that the polyurethane is divided equally
Son amount is 65000.
7. a kind of cucumber seedling-raising controlled-releasing compounding fertilizer according to claim 1, which is characterized in that the initial stage of the coated carbamide
Dissolution rate is 1.90%, and the fertilizer releasing period of the coated carbamide is 46 days.
8. a kind of cucumber seedling-raising controlled-releasing compounding fertilizer according to claim 1, which is characterized in that N in the ammonium nitrate phosphorus
Mass percentage is 32%；P in the ammonium nitrate phosphorus2O5Mass percentage be 4%；P in the phosphate fertilizer2O5Quality
Percentage composition is 40%；K in the potash fertilizer2The mass percentage of O is 52%.
9. the preparation method of -8 any a kind of cucumber seedling-raising controlled-releasing compounding fertilizers according to claim 1, which is characterized in that packet
Include following steps:
By 10-12 parts of coated carbamide, 2-4 parts of ammonium nitrate phosphorus, 3-4 parts of phosphate fertilizer and 3 parts of potash fertilizer mixings, it is multiple to obtain cucumber seedling-raising controlled release
Complex fertilizer.
10. a kind of preparation method of cucumber seedling-raising controlled-releasing compounding fertilizer according to claim 9, which is characterized in that by coating
12 parts of urea, 2 parts of ammonium nitrate phosphorus, 4 parts of phosphate fertilizer and 3 parts of potash fertilizer mixings, obtain cucumber seedling-raising controlled-releasing compounding fertilizer.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102199046A (en) * | 2010-03-23 | 2011-09-28 | 中国农业大学 | Controlled release compound fertilizer for corn seedling and preparation method thereof |
| US20120240648A1 (en) * | 2008-07-16 | 2012-09-27 | Agrium, Inc. | Controlled release fertilizer composition |
-
2019
- 2019-03-06 CN CN201910166362.0A patent/CN109734499A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120240648A1 (en) * | 2008-07-16 | 2012-09-27 | Agrium, Inc. | Controlled release fertilizer composition |
| CN102199046A (en) * | 2010-03-23 | 2011-09-28 | 中国农业大学 | Controlled release compound fertilizer for corn seedling and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 张忠诚: "《中国农村实用科技百科全书 第2卷》", 31 October 2000, 光明日报出版社 * |
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Application publication date: 20190510 |