CN102320890A - Production of hybrid seeds corn is multi-functional special-purpose fertile - Google Patents
Production of hybrid seeds corn is multi-functional special-purpose fertile Download PDFInfo
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Abstract
It is multi-functional special-purpose fertile to the present invention relates to a kind of production of hybrid seeds corn, this special use fertilizer by urea, monoammonium phosphate, cow dung, zinc sulfate, Z 150PH, water-holding agent, the anti-continuous cropping factor by air-dry weight per-cent 48～52: 28～32: 6～10: 3～6: 1～4: 1～4: 1～4 mixing granulation forms.It is---polyvinyl alcohol graft copolymerized to feces of livestock and poultry---on the cow dung that the present invention is soil conditioner; Add mineral element, water-holding agent, the anti-continuous cropping factor; Quick-acting, the water conservation of water-holding agent of long-acting, the mineral element of cow dung, the diseases prevention of the anti-continuous cropping factor, the effect of improving the soil of Z 150PH are combined together; Development set environmental protection, nutrition, improve the soil, production of hybrid seeds corn environment protection type multifunctional that water conservation, diseases prevention are one is special-purpose fertile, it is big to have solved production of hybrid seeds maize sown area, continuous cropping year limit for length; The soil nutrient proportional imbalance, soil-borne disease takes place serious; Soil compaction, problems such as water storage function weakening.
Description
Technical field
The present invention relates to production of hybrid seeds Maize Production field, relate in particular to the multi-functional special-purpose fertilizer of production of hybrid seeds corn.
Background technology
Gansu is to be main big agricultural province with plant husbandry, and is along with the raising of level of agricultural production, fewer and feweri to utilizing of original agricultural wastes as fuel and fertilizer.Organic solid castoff has domestic animal fertilizer, mud, waste residue and cake fertilizer through landlocked irrigated area, the investigation west of a river, Gansu, and total resources is 3470.10 ten thousand t, and wherein: feces of livestock and poultry 2734.36 ten thousand t account for 78.80% of total resources; Municipal sludge 645.42 ten thousand t account for total resources 18.60%; Various waste residue 79.81 ten thousand t account for 2.30% of total resources; Cake fertilizer 10.51 ten thousand t account for 0.30% of total resources.These agricultural organic wastes contain organic 24.85～87.80%; Full nitrogen 0.32～0.65%; Full phosphorus 0.21～0.59%, full potassium 0.43～1.55%, the agricultural organic waste controlled contents standard that heavy metal element Hg, Cd, Cr, Pb content are all stipulated less than GB8172-87.At present agricultural organic waste is used for also the field, burns, does fertilizer, biogas accounts for total resources 40%, also has 60% waste not have corresponding control measures, arbitrarily stacks, and especially simply burnt can major polluting atmosphere environment for agricultural crop straw; Feces of livestock and poultry huddles random row; Feces of livestock and poultry contains a large amount of organism of not digested and assimilated, inorganics, germ etc.; Cause severe contamination surface water, underground water, soil and air; Cause river severe contamination, body eutrophication, water quality severe exacerbation, the environment of locality is done a lot of damage.
Landlocked irrigated area, the west of a river, Gansu has advantageous natural condition and advantage in geography; Attracted Dupont pioneer, U.S. Meng Shan all, step on extra large pioneer species industry, China seed industry, East Asia, Liaoning, the farming of Beijing moral, Ao Ruijin, Dunhuang etc. more than 90 family and plant industry groups both at home and abroad; Set up 150 hundred million mu in corn seed producing base, the corn seed producing industry has developed into one of mainstay industry of the landlocked irrigated area increasing peasant income in the west of a river, growth of agricultural efficiency.The subject matter that exists at present is: production of hybrid seeds maize sown area is big, continuous cropping year limit for length, and the soil nutrient proportional imbalance, the physiological disturbance of nutritional deficiency often takes place; The fertilizer input amount is not enough, and the chemical fertilizer excess is used, soil compaction, and the water storage function weakens, and the fertilising cost increases; The fertile effective constituent of the compound that circulates on the market and ratio do not meet local area filling desert soil nutrient present situation and corn to the nutrient absorbing ratio, and do not possess water conservation, the effect of improving the soil; Cause production of hybrid seeds corn quality and output to descend, part is planted industry group and is flowed to Xinjiang, Inner Mongol and Ningxia, has influenced the Sustainable development of local area production of hybrid seeds corn industry.Therefore, research and development collects nutrition, water conservation, improving the soil becomes the key point of the fertile research and development of compound for the special-purpose fertilizer of the production of hybrid seeds corn environment protection type multifunctional of one.
Summary of the invention
Technical problem to be solved by this invention provides a kind of low production cost, it is multi-functional special-purpose fertile effectively to improve the production of hybrid seeds corn of production of hybrid seeds corn quality and output.
For addressing the above problem; Production of hybrid seeds corn of the present invention is multi-functional special-purpose fertile, it is characterized in that: this special use fertilizer by urea, monoammonium phosphate, cow dung, zinc sulfate, Z 150PH, water-holding agent, the anti-continuous cropping factor by air-dry weight per-cent 48～52: 28～32: 6～10: 3～6: 1～4: 1～4: 1～4 mixing granulation forms.
Said urea is meant that granularity is 0.50～1mm and to contain the N massfraction be 46% urea powder.
Said monoammonium phosphate is meant that granularity is 0.50～1mm and to contain the N massfraction be 12%, contain P
2O
5Massfraction is 52% monoammonium phosphate powder.
The granularity of said cow dung is 0.50～1mm, and containing organic massfraction is 14%～15%, and full N massfraction is 30%～32%, and full P massfraction is 0.24%～0.25%, and full K massfraction is 0.13%～0.15%, and C/N is 45～46/1.
Said zinc sulfate is meant that granularity is 0.50～1mm and to contain the Zn massfraction be 23% zinc sulphate powder.
Said Z 150PH is meant that granularity is the pva powder of 0.50～1mm.
Said water-holding agent is meant that granularity is the water-holding agent powder of 0.50～1mm and water absorbent rate 645g/g.
The said anti-continuous cropping factor press air-dry weight per-cent 30～35: 28～35 after being meant Vetstrep, first frost MnZn, five nitre derosal, venus crystals pulverize separately to granularity being the powder of 0.50～1mm: 18～25: 10～15 mix and must powder.
The multi-functional special-purpose fertile working method of aforesaid production of hybrid seeds corn may further comprise the steps:
(1) by each component of prescription weighing;
(2) cattle manure: said cow dung is added 1.00～1.38kg urea by every cube, and making its C/N is 20～25: 1; Add water then and make its water cut reach 60～65%, mixing piles high trapezoidal of 1.0～1.2m, the fermentation 60～90d that banks up, and temperature drops to room temperature in heap, and the air-dry granularity that is crushed to is 0.50～1mm, obtains the cow dung of harmless treatment;
(3) cow dung after the said harmless treatment and urea, monoammonium phosphate, zinc sulfate, Z 150PH, water-holding agent, the anti-continuous cropping factor are carried in mixing machine after measuring according to formula rate, mix after 25～30 minutes, obtain mixture;
(4) said mixture is cooled to room temperature after granulation, drying, carries out classification, screening, packing by ordinary method then and promptly gets.
The present invention compared with prior art has the following advantages:
1, the cow dung aboundresources of selecting for use owing to the present invention, containing organic massfraction is 14%～15%, full N massfraction is 0.30%～0.32%; Full P massfraction is 0.24%～0.25%; Full K massfraction is 0.13%～0.15%, and C/N is 45～46/1, the agricultural organic waste controlled contents standard that heavy metal element Hg, Cd, Cr, Pb content are all stipulated less than GB8172-87; Therefore; Resource circulation utilization and increment have not only been promoted, and have reduced production cost of the present invention effectively that producing for production of hybrid seeds corn big area provides technical support.
2, the present invention is carried out can finding out after the mass analysis that product of the present invention reaches the specification of quality (referring to table 1) of composite fertilizer.
Table 1 product quality analysis result of the present invention
| Test item | Detected result | Standard index | Detect foundation |
| Organic (%) | 4.50-5.00 | ≥4.50 | Potassium bichromate titrimetric method |
| N(％) | 28.00-29.00 | ≥28.00 | GB/T?2441-91 |
| P 2O 5(％) | 12.50-13.00 | ≥12.50. | The yellow colorimetric estimation of phosphorus vanadium molybdenum |
| Zn(％) | 0.80-0.90 | ≥0.80 | The atomic spectrophotometer method |
| H 2O(％) | 4.50-5.00 | ≤5 | Oven drying method |
| pH | 6.50-7.50 | ≤7.5 | Potential method |
| Ultimate compression strength (kg/cm 2) | 5.50-6.00 | ≥6 | GB/T?17767.1-1999 |
| Granularity (%) | 88-90 | ≥90 | GB/T?8573-1999 |
| Water absorbent rate (g/g) | 135-140 | ≥135 | GB/T?17767.3-1999 |
| Cd(mg/kg) | 0.70-0.80 | ≤0.80 | Oven drying method |
| Hg(mg/kg) | 0.06-0.07 | ≤0.07 | GB/T?8576-2002 |
| As(mg/kg) | 17.00-18.00 | ≤18.00 | GB/T?17593-1998 |
| Pb(mg/kg) | 5.50-6.00 | ≤6.00 | GB/T?17593 |
| Cr(mg/kg) | 6.00-6.50 | ≤6.50 | GB/T?17593 |
3, the present invention being carried out soil physical properties mark test back finds; Production of hybrid seeds corn field is used the multi-functional special-purpose fertilizer of the present invention and is compared with traditional fertilizer; Soil total porosity, crumb structure, natural moisture content, the soil organism increase by 12.83%, 15.47%, 5.04% respectively, 0.55g/kg, and the soil weight reduces 0.23g/cm
3(referring to table 2).
The multi-functional special-purpose fertile influence of table 2 the present invention to soil physical properties
4, the present invention being carried out economic target test back finds; Production of hybrid seeds corn field is used the present invention multi-functional special-purpose fertile and traditional fertilizer relatively, and production of hybrid seeds corn grain number per spike, fringe grain are heavy, 100-grain weight, output, fertilization profit have increased by 8.33 numbers respectively, 6.39g, 1.21g, 39.39kg/ mu, 42.60 yuan/mu (referring to table 3).
The multi-functional special-purpose fertile fertilizer efficiency with traditional fertilizer of table 3 production of hybrid seeds corn compares
* 1.80 yuan/kg of urea; 3.80 yuan/kg of primary ammonium phosphate; Multi-functional special-purpose fertile 3.15 yuan/kg, 3.50 yuan/kg of production of hybrid seeds corn product
5, because the present invention has utilized cow dung, therefore, promote resource circulation utilization and increment, had good social benefit.
6, it is---polyvinyl alcohol graft copolymerized to feces of livestock and poultry---on the cow dung that the present invention is soil conditioner; Add mineral element, water-holding agent, the anti-continuous cropping factor; Quick-acting, the water conservation of water-holding agent of long-acting, the mineral element of cow dung, the diseases prevention of the anti-continuous cropping factor, the effect of improving the soil of Z 150PH are combined together; Development set environmental protection, nutrition, improve the soil, production of hybrid seeds corn environment protection type multifunctional that water conservation, diseases prevention are one is special-purpose fertile, it is big to have solved production of hybrid seeds maize sown area, continuous cropping year limit for length; The soil nutrient proportional imbalance, soil-borne disease takes place serious; Soil compaction, problems such as water storage function weakening.
7, the present invention utilizes the organic matter in the cow dung, synthetic soil ulmin, and the polar functional group of soil ulmin is adsorption moisture and mineral nutrient element not only; Reduce volatilization, the nitrate leaching of ammonia-state nitrogen, improve chemical fertilizer and efficiency of water application, and adsorbed the heavy metal in the mineral element; Passivation heavy metal ion active; Reduce crop heavy metal of body ionic concn, improved production of hybrid seeds corn quality, for the nuisanceless production of production of hybrid seeds corn provides technical support.
8, remarkable in economical benefits of the present invention.Effective popularizing area was 100,000 mu in the Hexi Corridor, Gansu in 2008,2009,2010 in the present invention.According to " the agricultural science and technology achievement economic benefit installation " that the Chinese Academy of Agricultural Sciences issues, project is promoted the economic benefit in year and estimated, the result shows: newly-increased 1.80 hundred million yuan of the gross output values (100,000 mu * 1800 yuan/mu); 9008,00,000 yuan of the new profits (100,000 mu * 900 yuan/mu); Joint 4,260,000 yuan of a total value (100,000 mu * 42.60 yuan/mu).
9, raw material of the present invention is easy to get, and is easy to implement.
Embodiment
Embodiment 1 production of hybrid seeds corn is multi-functional special-purpose fertile, this special use fertilizer by urea, monoammonium phosphate, cow dung, zinc sulfate, Z 150PH, water-holding agent, the anti-continuous cropping factor by air-dry weight per-cent (kg/kg) 48: 28: 6: 6: 4: 4: 4 mixing granulations formed.
The multi-functional special-purpose fertile working method of this production of hybrid seeds corn may further comprise the steps:
(1) by each component of prescription weighing.
(2) cattle manure: cow dung is added 1.00～1.38kg urea by every cube, and making its C/N is 20～25: 1; Add water then and make its water cut reach 60～65%, mixing piles high trapezoidal of 1.0～1.2m, the fermentation 60～90d that banks up, and temperature drops to room temperature in heap, and the air-dry granularity that is crushed to is 0.50～1mm, obtains the cow dung of harmless treatment.
Wherein: the granularity of cow dung is 0.50～1mm, and containing organic massfraction is 14%～15%, and full N massfraction is 30%～32%, and full P massfraction is 0.24%～0.25%, and full K massfraction is 0.13%～0.15%, and C/N is 45～46/1.
(3) cow dung after the harmless treatment and urea, monoammonium phosphate, zinc sulfate, Z 150PH, water-holding agent, the anti-continuous cropping factor are carried in mixing machine after measuring according to formula rate, mix after 25～30 minutes, obtain mixture.
Wherein: urea is meant that granularity is 0.50～1mm and to contain the N massfraction be 46% urea powder.
Monoammonium phosphate is meant that granularity is 0.50～1mm and to contain the N massfraction be 12%, contain P
2O
5Massfraction is 52% monoammonium phosphate powder.
Zinc sulfate is meant that granularity is 0.50～1mm and to contain the Zn massfraction be 23% zinc sulphate powder.
Z 150PH is meant that granularity is the pva powder of 0.50～1mm.
Water-holding agent is meant that granularity is the water-holding agent powder of 0.50～1mm and water absorbent rate 645g/g.
The anti-continuous cropping factor press air-dry weight per-cent (kg/kg) 30: 30: 25 after being meant Vetstrep, first frost MnZn, five nitre derosal, venus crystals pulverize separately to granularity being the powder of 0.50～1mm: 15 mix and must powder.
(4) mixture is through tablets press (HFZL type; 6t/h) granulation; Adopting ZG15150 type dryer after the granulation is that 340～350 ℃, temperature out are to carry out drying under 110～120 ℃ the condition in temperature in, is cooled to room temperature, carries out classification, screening, packing by ordinary method then and promptly gets.
Embodiment 2 production of hybrid seeds corns are multi-functional special-purpose fertile, this special use fertilizer by urea, monoammonium phosphate, cow dung, zinc sulfate, Z 150PH, water-holding agent, the anti-continuous cropping factor by air-dry weight per-cent (kg/kg) 52: 32: 10: 3: 1: 1: 1 mixing granulation formed.
Multi-functional special-purpose fertile working method of this production of hybrid seeds corn and cow dung, urea, diammonium phosphate, zinc sulfate, Z 150PH, water-holding agent are with embodiment 1.
The anti-continuous cropping factor press air-dry weight per-cent (kg/kg) 32: 28: 25 after being meant Vetstrep, first frost MnZn, five nitre derosal, venus crystals pulverize separately to granularity being the powder of 0.50～1mm: 15 mix and must powder.
Embodiment 3 production of hybrid seeds corns are multi-functional special-purpose fertile, this special use fertilizer by urea, monoammonium phosphate, cow dung, zinc sulfate, Z 150PH, water-holding agent, the anti-continuous cropping factor by air-dry weight per-cent (kg/kg) 50: 30: 8: 4: 3: 3: 2 mixing granulations formed.
Multi-functional special-purpose fertile working method of this production of hybrid seeds corn and cow dung, urea, diammonium phosphate, zinc sulfate, Z 150PH, water-holding agent are with embodiment 1.
The anti-continuous cropping factor press air-dry weight per-cent (kg/kg) 35: 35: 20 after being meant Vetstrep, first frost MnZn, five nitre derosal, venus crystals pulverize separately to granularity being the powder of 0.50～1mm: 10 mix and must powder.
Embodiment 4 production of hybrid seeds corns are multi-functional special-purpose fertile, this special use fertilizer by urea, monoammonium phosphate, cow dung, zinc sulfate, Z 150PH, water-holding agent, the anti-continuous cropping factor by air-dry weight per-cent (kg/kg) 49: 31: 7: 5: 2: 3: 3 mixing granulations formed.
Multi-functional special-purpose fertile working method of this production of hybrid seeds corn and cow dung, urea, diammonium phosphate, zinc sulfate, Z 150PH, water-holding agent are with embodiment 1.
The anti-continuous cropping factor press air-dry weight per-cent (kg/kg) 34: 33: 18 after being meant Vetstrep, first frost MnZn, five nitre derosal, venus crystals pulverize separately to granularity being the powder of 0.50～1mm: 15 mix and must powder.
Embodiment 5 production of hybrid seeds corns are multi-functional special-purpose fertile, this special use fertilizer by urea, monoammonium phosphate, cow dung, zinc sulfate, Z 150PH, water-holding agent, the anti-continuous cropping factor by air-dry weight per-cent (kg/kg) 51: 29: 9: 6: 2: 2: 1 mixing granulation formed.
Multi-functional special-purpose fertile working method of this production of hybrid seeds corn and cow dung, urea, diammonium phosphate, zinc sulfate, Z 150PH, water-holding agent are with embodiment 1.
The anti-continuous cropping factor press air-dry weight per-cent (kg/kg) 32: 34: 22 after being meant Vetstrep, first frost MnZn, five nitre derosal, venus crystals pulverize separately to granularity being the powder of 0.50～1mm: 12 mix and must powder.
Embodiment 6 production of hybrid seeds corns are multi-functional special-purpose fertile, this special use fertilizer by urea, monoammonium phosphate, cow dung, zinc sulfate, Z 150PH, water-holding agent, the anti-continuous cropping factor by air-dry weight per-cent (kg/kg) 51: 29: 9: 6: 2: 2: 1 mixing granulation formed.
Multi-functional special-purpose fertile working method of this production of hybrid seeds corn and cow dung, urea, diammonium phosphate, zinc sulfate, Z 150PH, water-holding agent are with embodiment 1.
The anti-continuous cropping factor press air-dry weight per-cent (kg/kg) 31: 33: 23 after being meant Vetstrep, first frost MnZn, five nitre derosal, venus crystals pulverize separately to granularity being the powder of 0.50～1mm: 13 mix and must powder.
Urea, monoammonium phosphate, zinc sulfate, Z 150PH, water-holding agent, Vetstrep, first frost MnZn, five nitre derosal, venus crystals are the commercially available prod in the foregoing description 1～6.
Claims (9)
1. production of hybrid seeds corn is multi-functional special-purpose fertile, it is characterized in that: this special use fertilizer by urea, monoammonium phosphate, cow dung, zinc sulfate, Z 150PH, water-holding agent, the anti-continuous cropping factor by air-dry weight per-cent 48～52: 28～32: 6～10: 3～6: 1～4: 1～4: 1～4 mixing granulation forms.
2. production of hybrid seeds corn as claimed in claim 1 is multi-functional special-purpose fertile, it is characterized in that: said urea is meant that granularity is 0.50～1mm and to contain the N massfraction be 46% urea powder.
3. production of hybrid seeds corn as claimed in claim 1 is multi-functional special-purpose fertile, it is characterized in that: said monoammonium phosphate is meant that granularity is 0.50～1mm and to contain the N massfraction be 12%, contain P
2O
5Massfraction is 52% monoammonium phosphate powder.
4. production of hybrid seeds corn as claimed in claim 1 is multi-functional special-purpose fertile; It is characterized in that: the granularity of said cow dung is 0.50～1mm; Containing organic massfraction is 14%～15%, and full N massfraction is 30%～32%, and full P massfraction is 0.24%～0.25%; Full K massfraction is 0.13%～0.15%, and C/N is 45～46/1.
5. production of hybrid seeds corn as claimed in claim 1 is multi-functional special-purpose fertile, it is characterized in that: said zinc sulfate is meant that granularity is 0.50～1mm and to contain the Zn massfraction be 23% zinc sulphate powder.
6. production of hybrid seeds corn as claimed in claim 1 is multi-functional special-purpose fertile, and it is characterized in that: said Z 150PH is meant that granularity is the pva powder of 0.50～1mm.
7. production of hybrid seeds corn as claimed in claim 1 is multi-functional special-purpose fertile, and it is characterized in that: said water-holding agent is meant that granularity is the water-holding agent powder of 0.50～1mm and water absorbent rate 645g/g.
8. production of hybrid seeds corn as claimed in claim 1 is multi-functional special-purpose fertile; It is characterized in that: the said anti-continuous cropping factor press air-dry weight per-cent 30～35: 28～35 after being meant Vetstrep, first frost MnZn, five nitre derosal, venus crystals pulverize separately to granularity being the powder of 0.50～1mm: 18～25: 10～15 mix and must powder.
9. the multi-functional special-purpose fertile working method of production of hybrid seeds corn as claimed in claim 1 may further comprise the steps:
(1) by each component of prescription weighing;
(2) cattle manure: said cow dung is added 1.00～1.38kg urea by every cube, and making its C/N is 20～25: 1; Add water then and make its water cut reach 60～65%, mixing piles high trapezoidal of 1.0～1.2m, the fermentation 60～90d that banks up, and temperature drops to room temperature in heap, and the air-dry granularity that is crushed to is 0.50～1mm, obtains the cow dung of harmless treatment;
(3) cow dung after the said harmless treatment and urea, monoammonium phosphate, zinc sulfate, Z 150PH, water-holding agent, the anti-continuous cropping factor are carried in mixing machine after measuring according to formula rate, mix after 25～30 minutes, obtain mixture;
(4) said mixture is cooled to room temperature after granulation, drying, carries out classification, screening, packing by ordinary method then and promptly gets.
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| CN102910956A (en) * | 2012-11-16 | 2013-02-06 | 四川农业大学 | Organic-inorganic compound fertilizer special for corn and energy conservation and emission reduction application method of fertilizer |
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| CN102910956A (en) * | 2012-11-16 | 2013-02-06 | 四川农业大学 | Organic-inorganic compound fertilizer special for corn and energy conservation and emission reduction application method of fertilizer |
| CN102936173A (en) * | 2012-12-06 | 2013-02-20 | 甘肃省敦煌种业股份有限公司玉门市种子公司 | Seed production cornfield continuous cropping obstacle conditioner |
| CN102965121A (en) * | 2012-12-06 | 2013-03-13 | 甘肃省敦煌种业股份有限公司玉门市种子公司 | Saline soil modifying agent |
| CN102965121B (en) * | 2012-12-06 | 2015-04-15 | 甘肃省敦煌种业股份有限公司玉门市种子公司 | Saline soil modifying agent |
| CN103333030A (en) * | 2013-07-08 | 2013-10-02 | 张掖市多成农业有限公司 | Composite fertilizer special for corn and preparation method thereof |
| CN103319266A (en) * | 2013-07-08 | 2013-09-25 | 张掖市多成农业有限公司 | continuous cropping obstacle regulation and control agent for corn field and preparation method thereof |
| CN103333016A (en) * | 2013-07-15 | 2013-10-02 | 甘肃省敦煌种业股份有限公司玉门市种子公司 | Special water-retention fertilizer for seed corn |
| CN103333017A (en) * | 2013-07-15 | 2013-10-02 | 甘肃省敦煌种业股份有限公司玉门市种子公司 | Special environment-friendly fertilizer for seed corn |
| CN103342608A (en) * | 2013-07-15 | 2013-10-09 | 甘肃省敦煌种业股份有限公司玉门市种子公司 | Special fertilizer resistant to continuous cropping of corn for seed |
| CN103342617A (en) * | 2013-07-15 | 2013-10-09 | 甘肃省敦煌种业股份有限公司玉门市种子公司 | Disinfection compound fertilizer for soil in field of corn for seed |
| CN103342607A (en) * | 2013-07-15 | 2013-10-09 | 甘肃省敦煌种业股份有限公司玉门市种子公司 | Special fertilizer for modifying soil property of seed corn |
| CN103342617B (en) * | 2013-07-15 | 2015-02-11 | 甘肃省敦煌种业股份有限公司玉门市种子公司 | Disinfection compound fertilizer for soil in field of corn for seed |
| CN103387464A (en) * | 2013-08-07 | 2013-11-13 | 甘肃省敦煌种业股份有限公司 | Special drought-resisting fertilizer for corns for seeds and preparation method thereof |
| CN103664410A (en) * | 2013-12-26 | 2014-03-26 | 朱健花 | Special fertilizer for corns |
| CN105837314A (en) * | 2016-03-24 | 2016-08-10 | 甘肃省敦煌种业股份有限公司研究院 | Corn-for-seed field improver and preparation method thereof |
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