CN101050149B - Weed removal medicinal fertilizer for paddy rice, and fabricating method - Google Patents
Weed removal medicinal fertilizer for paddy rice, and fabricating method Download PDFInfo
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Abstract
This invention discloses a method for preparing a weed-removal fertilizer for rice. The fertilizer comprises: bensulfuron 0.02-0.15 wt.%, pretilachlor 0.10-1.0 wt.%, surfactant 0.20-1.0 wt.%, safener 0.06-0.5 wt.%, cosolvent 0.5-2.0 wt.%, carrier fertilizer (N) 40-65 wt.%, and fillers as balance. The method comprises: mixing the above components in a sealed apparatus with a stirrer, encapsulating, granulating to obtain stable fertilizer granules, examining, and packaging. The sieved powder is pulverized and returned to the mixing process.
Description
Technical field
The present invention relates to a kind of Weed removal medicinal fertilizer for paddy rice and manufacture method thereof.
Technical background
The research of Weed removal medicinal fertilizer, the data record sees 1964 " northeastern Japan agricultural experiment station research report " the earliest, ploughing one with this paddy is that the researchist of representative begins one's study from early 1960s and weedicide pentachlorophenol (PCP) is sneaked into fertilizer uses as base manure, reach the saving labour with it, the purpose of continuity herbicidal effect.Result of study shows, uses the NH that sneaks into PCP in the field
3Behind-N the fertilizer, can prevent NO
3-disappearance, reason is the metabolism that PCP can suppress nitrobacteria in the soil, and nitrification is hindered, thereby obtains PCP and fertilizer is used with, not only can keep its drug effect, and the conclusion that suppresses nitrification and the similar effect of topdressing is arranged.U.S. scientific research personnel finds prometryn energy strongly inhibited nitrification and denitrification at the mid-1960s, reduces the loss of nitrogen, can also strengthen biological nitrogen fixation, so can increase the nitrogen content in the soil.Kind surplus the weedicide 300 that the beginning of the eighties, the U.S. also once proposed Gong to use with, chemical fertilizer has 5 kinds, and wherein great majority are liquid composite fertilizer.But because the researchist finds that Weed removal medicinal fertilizer Chinese medicine and fertilizer do not match, process reasons such as loaded down with trivial details, poor stability, all fail large scale application after through some research, further research report is also rare.
Before and after the eighties, scientific research departments such as China Jilin Agriculture University, Ningxia Academy of Agri-Forestry Sciences, academy of agricultural sciences, Zhejiang Province and academy of agricultural sciences, Heilungkiang have also carried out the research of relevant Weed removal medicinal fertilizer in succession.With 2,4-D weedicide and urea or calcium superphosphate are used with as the Heilongjiang Province, find to have tangible synergy production-increasing function, particularly calcium superphosphate the most remarkable in raising drug effect and production-increasing function, but fail to be developed into stable product.The herbicide urea of Zhejiang, the development of Ningxia two provinces adopts coating method that weedicide is wrapped in the urea granules appearance, and finds that weedicide has significant inhibitory effect to the living spore sarcina ureae of the Ammonifying bacteria in the soil, thereby can improve the utilization ratio of urea.The use of on paddy rice, topdressing, though formed product, too single because of fertilizer and weedicide, the hypotrophy face, it is narrow to kill the grass spectrum, causes the integrated application effect undesirable, is difficult to apply.In fact the multi-functional special use of 16% weeding type paddy rice that Hunan Province Academy of Agricultural Sciences is developing is topdressed is exactly the ammonium hydrogencarbonate that has wrapped up weedicide, and fertilizer component is still single.The 1972-1974 of Jilin Agriculture University studies show that, after accounting for the sodium pentachlorophenate of fertilizer 7%-15% and urea or ammonium hydrogencarbonate and using with, can suppress the nitrification of soil, improves fertilizer effectiveness, and this is similar with day result of study of the cultivated first-class people of written or printed documents paddy.Go to river in the Jiangsu the regional institute of agricultural sciences developed since 1989 with Application and Development Weed removal medicinal fertilizer---the weeding of rice wheat oil series farm crop is special-purpose fertile, break through existing research and only limited to straight fertilizer and certain weedicide blended frame, adopt multiple multiple (mixing) to close technology and measure, make product really reach the double effects of infertile field and weeding.Through the exploration in surplus 10 years, systematic study fertile medicine blended do mutually effect, the biological effect of using ensuing crop, product production technique, store effect, performance index and supporting use technology.The series product that are developed into gone to river in Jiangsu composite fertilizer of regional institute of agricultural sciences factory, Tongcheng City, Anhui chemical industry company limited, Yuanjiang City, Hunan farmingization company limited and the industrialization development of Henan Zhumadian area Feng Wang insecticide factory, product is applied in area, the middle and lower reach of Yangtze River.
In addition, " one executes spirit " of " the rice weeding compound fertilizer " of Guangxi Inst. of Chemical Engineering, the development of Guangxi graduation factory and the development of the fertile limited liability company of Yulin City of Guangxi Zhuang Autonomous Shibaoling medicine once registered achievement, do not commercially produce but change over to so far.Guangxi land of happiness bio tech ltd in 2003 is succeeded in developing to use at the paddy rice initial stage has fertilising, two kinds of effects of weeding---0.101% benzyl fourth fertilizer granules (golden rice dragon), succeeded in developing 0.32% benbbensulfuronmethyl Butachlor technical 92 fertilizer granules (golden rice dragon No. 2) in 2006, and in national paddy rice planting range, apply, obtained good economic and social benefit.In general, domestic research and development to the Weed removal medicinal fertilizer product is less, and product category is few, and turnout is few, can not satisfy the demand in market far away.
Continuous development along with China's rice cultivating technique, cultivation mode is developed into various modes coexistences such as present transplanting, rice transplanting, no-tillage cast-transplanted and direct sowing of rice by original single transplanting method, wherein, no-tillage cast-transplanted and direct sowing of rice become the main flow cultivation mode of paddy rice because of it has easy, saving of labor, advantage such as easy to operate is applied greatly.Direct sowing of rice is exactly a kind of planting type that directly seed is sowed at the land for growing field crops without seedling, transplanting.In China's southeastern coast various places development rapidly, popularizing area also constantly increases in recent years at present.Facts have proved that direct sowing of rice has following advantage: the one, saving of labor, laborsaving, characteristics such as output is high, precocity.But because rice paddy seed directly broadcasts sowing in big Tanaka, seed rice and weed seed germinate simultaneously, add that the Direct-seeding Rice sowing is rare, and the space between seedling is big, and light, temperature, fertilizer, water condition are good, also are beneficial to weed growth, prevent and kill off as untimely attention, tend to cause crop smothering.Therefore, scientificlly and effectively preventing and kill off crop smothering is that the Direct-seeding Rice success is in the key of denying.
The applicant had once developed a kind of Weed removal medicinal fertilizer for paddy rice-0.101% benbbensulfuronmethyl Butachlor technical 92 fertilizer granules; and with its product and production technology application patent protection; but this Weed removal medicinal fertilizer for paddy rice only is applicable to transplanted rice field and seedling throwing field and uses; be not suitable for rice direct seeding field; and the dust disposal expense in its manufacturing process is bigger, and cost is higher.Along with the news speed propelling in the live field of rice in China, rice direct seeding field presses for a kind of Weed removal medicinal fertilizer that can use in the paddy rice seedling phase.For this reason, the applicant needs fertile feature according to rice direct seeding field field weed kind, characteristics and paddy growth, with fertile part that rationally is mixed, materials such as adding weedicide benbbensulfuronmethyl, the third careless amine and tensio-active agent, safe auxiliary agent, stablizer form stable medicine fertilizer mixing particle agent.This product integrates medicine, fertilizer, has weeding and fertilizer efficiency function, is applicable to transplanted rice field, seedling throwing field and the use of live field, particularly can be directly used in live water in field rice seedling phase weeding.Products innovation is: (1) selected weedicide benbbensulfuronmethyl, the third careless amine are under the effect of tensio-active agent, safe auxiliary agent, produce the base with the fertilizer nitrogen and add effect, the weedicide that has overcome conventional benbbensulfuronmethyl, the third careless amine compatibility can only be in the limitation of rice seedling throwing field use, the low levels medicine fertilizer mixing particle agent of being developed can directly apply to the double weeding of rice direct seeding field seeding stage fertilising, to rice safety.(2) on the technology, overcome the technology weakness of conventional " powder-dilution " mixing granulation medicine fertilizer, introduce the Technology of " coating-dilution " coating granulation medicine fertilizer, solved low component agricultural chemicals uniform mixing processing technology, processing package stability technology and the safe and efficient release tech of weeding effective constituent in carrier fertilizer.(3) product has carried out field medicine effect test through the scientific research arbitration department-agriculture chemical examination institution, Guangdong Province etc. of The Ministry of Agriculture of the People's Republic of China, MOA agriculture chemical examination institution fixed point, the result proves: this product can directly be used at the rice direct seeding field seeding stage, preventive effect to weeds in paddy field reaches more than 84.70%, to rice safety, can promote paddy growth, have production-increasing function.
Technology contents
The prescription effective constituent of Weed removal medicinal fertilizer of the present invention comprises by the Weed removal medicinal fertilizer gross weight:
Benbbensulfuronmethyl 0.02%-0.15%;
The third careless amine 0.10%-1.0%;
Tensio-active agent 0.20%-1.0%;
Safener 0.06%-0.5%;
Solubility promoter 0.5%-2.0%;
Carrier fertilizer 40%-65%;
All the other are filler.
This medicine fertilizer also can contain one or more compounds, and wherein the total content of zinc, boron, iron and cu microelements compound is the 0.5%-3.0% of Weed removal medicinal fertilizer gross weight; Tensio-active agent is one of methyl sodiosul foaliphatate or styrenated phenol Soxylat A 25-7 or their mixture, and content is the 0.20%-1.0% of Weed removal medicinal fertilizer gross weight; Safener is 4,6-two chloro-2-phenyl-pyrimidines, and content is the 0.06%-0.5% of Weed removal medicinal fertilizer gross weight; Solubility promoter is one of N-N-methyl-2-2-pyrrolidone N-, tetramethylene sulfone, methyl alcohol or their mixture, and content is the 0.5%-2.0% of Weed removal medicinal fertilizer gross weight; Carrier fertilizer content is the 40%-65% of Weed removal medicinal fertilizer gross weight, and the available nutrient that is contained is one of urea, ammonium chloride, ammonium sulfate, monoammonium phosphate or their mixture, and its nitrogen nutrient total content is the 12%-25% of Weed removal medicinal fertilizer gross weight; Filler is silico-calcium soil or clay or their mixture.
The present invention also provides a kind of manufacture method of Weed removal medicinal fertilizer for paddy rice:
According to the fertile principle of " coating-dilution " coating granulation medicine, by the Weed removal medicinal fertilizer gross weight, the former medicine of 0.02%-0.15% benbbensulfuronmethyl, the former medicine of the 0.10%-1.0% third careless amine, the 0.20%-1.0% tensio-active agent, the 0.06%-0.5% safener, the mixed solution of 0.5%-2.0% solubility promoter mixes in airtight whipping appts with the carrier fertilizer of 40%-65% and the filler of surplus, obtain stable fertilizer granules through the coating granulation, after the assay was approved, carry out finished product packing, the powder sieving thing turns back to mixed processes after crushed, wherein said tensio-active agent is one of methyl sodiosul foaliphatate or styrenated phenol Soxylat A 25-7 or their mixture, and wherein said solubility promoter is the N-N-methyl-2-2-pyrrolidone N-, tetramethylene sulfone, one of methyl alcohol or their mixture.
Also can contain one or more compounds in the fertilizer granules that this manufacture method is produced, trace compound total contents such as its zinc, boron, iron and copper are the 0.5%-3.0% of Weed removal medicinal fertilizer gross weight.
Carrier fertilizer content in this manufacture method is the 40%-65% of Weed removal medicinal fertilizer gross weight, the available nutrient that is contained is one of urea, ammonium chloride, ammonium sulfate, monoammonium phosphate or their mixture, and its nitrogen nutrient total content is the 12%-25% of Weed removal medicinal fertilizer gross weight; Safener is 4,6-two chloro-2-phenyl-pyrimidines, and content is the 0.06%-0.5% of Weed removal medicinal fertilizer gross weight; Tensio-active agent is one of methyl sodiosul foaliphatate or styrenated phenol Soxylat A 25-7 or their mixture, and content is the 0.20%-1.0% of Weed removal medicinal fertilizer gross weight; Solubility promoter is one of N-N-methyl-2-2-pyrrolidone N-, tetramethylene sulfone, methyl alcohol or their mixture, and content is the 0.5%-2.0% of Weed removal medicinal fertilizer gross weight; Filler is silico-calcium soil or kaolin or clay or their mixture.
The compounded preparation of pesticide prescription that is used to prevent and kill off paddy field weed is a lot, and the pesticide active ingredient that Weed removal medicinal fertilizer of the present invention is selected for use is the benbbensulfuronmethyl and the third careless amine.Benbbensulfuronmethyl (bensulfuron) belongs to sulfonylurea herbicide, it is side switch amino acid synthetic inhibitor, behind the crop bud, before the weeds bud or dispenser behind the bud, can prevent and kill off broadleaf weeds and rice field nutgrass flatsedge, to most of annual higher with perennial broadleaf weed and sedge weed preventive effect, but relatively poor to the gramineous weeds preventive effect, the regulation using dosage under to rice safety.The third careless amine (pretilachlor) is the amides herbicide before seedling stage, is mainly used in and prevents and kill off rice terrace annual gramineae and some broadleaf weeds, as barnyard grass grass, Semen Euphorbiae, Herba Cyperi Difformis, Sheathed Monochoria, fescue, Herba Fimbristylis miliaceae, Herba Clinopodii Polycephali etc.; It mainly absorbs by plumule and mesocotyl, hypocotyl, directly disturbs weeds body internal protein synthetic, and influences photosynthesis and respiration, makes the weeds primary leaf be difficult to elongation, the seedling distortion, and dark green leaf color, growth stops, and finally causes withered.Two kinds of medicaments, the structure difference, mechanism of action difference by rationally being mixed, can be prevented and kill off broad-leaved and gramineous weeds simultaneously, has enlarged herbicidal spectrum, has improved preventive effect.Reduced dosage simultaneously, paddy rice and environmentAL safety have been improved.
Weed removal medicinal fertilizer of the present invention is the regulation of fertilizer requirement that grows according to live water in field rice, the best period of using at Weed removal medicinal fertilizer for paddy rice is in Honda growth early stage behind the rice growing, and these phase paddy rice need are fertile in the N element, therefore, select at the nutriment in a fertilizer of medicine fertilizer, mainly, mix composition by a certain percentage, help paddy rice rapid absorption nutrient with urea, ammonium chloride etc. based on nitrogenous fertilizer.
Add safener in the Weed removal medicinal fertilizer prescription, effectively the security of medicine fertilizer to live water in field rice seedling improved in the defense sector, to promote rice growth, improves output.
Add beneficial element silicon, calcium etc. in the Weed removal medicinal fertilizer prescription; Add trace element zinc, boron, iron, copper etc., guarantee paddy rice normal health growth under the trace element in capacity, can prevent effectively that paddy rice from sitting the root and stem of certain plants, strengthen the paddy rice anti contravariance ability, reduce disease and pest and take place, promote the paddy rice early growth and quick tiller.
In order to understand essence of an invention better, the field control effectiveness test of Weed removal medicinal fertilizer is described with example below, be arranged in provinces and regions agricultural chemicals arbitration departments such as agriculture chemical examination institution, Guangdong Province by The Institute for the Control of Agrochemicals of the Ministry of Agriculture,PRC and carried out the field control effectiveness test checking, be summarized as follows.
Reagent agent:
(1) fertilizer granules of the present invention.
(2) 10% benbbensulfuronmethyl wettable powders, the limited product of triumphant agricultural chemical industry in the Xinyi, Jiangsu Province.
(3) sweep not special 300 grams per liter missible oil, Switzerland is just reaching earlier Crop protection company limited product.
Controlling object:
(1) barnyard grass grass [Echinochloa crusgalli (L.) Beauv.]
(2) Sheathed Monochoria [Monochoria vaginalis (Burm.f.) Preslex Kunth]
(3) Herba Cyperi Difformis [Cyperus difformis L.]
Test is handled:
(1), the fertile GR of medicine of the present invention, 8kg/ mu (commodity amount).
(2), the fertile GR of medicine of the present invention, 10kg/ mu (commodity amount).
(3), the fertile GR of medicine of the present invention, 12kg/ mu (commodity amount).
(4), the fertile GR of medicine of the present invention, 20kg/ mu (commodity amount).
(5), 10% benbbensulfuronmethyl WP, 20g/ mu (commodity amount).
(6), sweep not special 300 grams per liter EC, 100 gram/mus (commodity amount).
(7)、CK。
Test-results gathers and sees Table 1,2,3.From the various places field test results, fertilizer granules mu of the present invention is with 8 kilograms, 10 kilograms, 12 kilograms and 20 kilograms are to weeds in paddy field such as barnyard grass grass, Sheathed Monochoria, the preventive effect of Herba Cyperi Difformis improves with the increase of dosage, 15 days total strain preventive effects of weeds are respectively 84.30% behind the medicine, 89.44%, 92.54% and 97.62%, 30 days total strain preventive effects of weeds are respectively 84.70% behind the medicine, 88.75%, 93.16% and 96.91%, 45 days total strain preventive effects of weeds are respectively 81.45% behind the medicine, 88.60%, 93.88% and 95.15%, the fresh weight preventive effect is respectively 84.77%, 88.59%, 92.22% and 95.17%; By the safety testing of Weed removal medicinal fertilizer, all find no symptom of chemical damage to paddy rice.
The Weed removal medicinal fertilizer of this research, mature production technology, steady quality.The technology contents of invention is described with example below, but content of the present invention is not limited thereto.Feed intake as can be seen from ten batches of productions of table 4: the product appearance quality is better, and every technical indicators such as active constituent content, moisture are all qualified, and stable yield is 98%, and production efficiency also reaches per hour 7.0 tons of expection, and promptly annual capacity reaches 4.0 ten thousand tons.Compare (table 5) by the manufacture method with medicine, fertile mixing granulation simultaneously, this coating comminution granulation all is better than the mixing granulation method in ratio of briquetting, anti-degraded and environmental protection dedusting etc.By relatively, proved the fertile design and manufacture technology science of this medicine, processing technology is feasible, lectotype selection is suitable, quality product reaches a standard, can produce in batches fully.
Direct sowing of rice field weed field control effectiveness test investigation statistics table is prevented and kill off in the third grass particle agent of table 1 0.2% benzyl
Direct sowing of rice field weed field control effectiveness test investigation statistics table is prevented and kill off in the third grass particle agent of table 2 0.2% benzyl
Direct sowing of rice field weed field control effectiveness test investigation statistics table is prevented and kill off in the third grass particle agent of table 3 0.2% benzyl
Table 40 batch products quality situations
Table 5 granulating and forming rate and degradation rate situation
Description of drawings
Fig. 1 is the technological process of production figure of Weed removal medicinal fertilizer of the present invention.
Embodiment
With reference to the fertile technological process of production figure of medicine of the present invention.By the Weed removal medicinal fertilizer gross weight, the former medicine of 0.02%-0.15% benbbensulfuronmethyl, the former medicine of the 0.10%-1.0% third careless amine, the 0.20%-1.0% tensio-active agent, the 0.06%-0.5% safener, the 0.5%-2.0% solubility promoter mixes in airtight whipping appts with carrier fertilizer and the filler of 40%-65%, obtain stable fertilizer granules through the coating granulation, after the assay was approved, carry out finished product packing, the powder sieving thing turns back to mixed processes after crushed.
Product is tested through heat storage stability, and the pesticide active ingredient rate of decomposition can be controlled in below 5% in the Weed removal medicinal fertilizer, meets the industry specification of quality; Gained fertilizer granules size is even, slick and sly, hardness is suitable, loose no dust does not lump.
Claims (8)
1. Weed removal medicinal fertilizer for paddy rice, its effective constituent comprises by the Weed removal medicinal fertilizer gross weight:
Benbbensulfuronmethyl 0.02%-0.15%,
The third careless amine 0.10%-1.0%,
Tensio-active agent 0.20%-1.0%,
Safener 0.06%-0.5%,
Solubility promoter 0.5%-2.0%,
Carrier fertilizer 40%-65%,
All the other are filler,
Wherein said tensio-active agent is one of methyl sodiosul foaliphatate or styrenated phenol Soxylat A 25-7 or their mixture, and described solubility promoter is one of N-N-methyl-2-2-pyrrolidone N-, tetramethylene sulfone, methyl alcohol or their mixture.
2. Weed removal medicinal fertilizer for paddy rice according to claim 1 comprises also that wherein one or more contain the compound of zinc, boron, iron and cu microelements, and this compound total content is the 0.5%-3.0% of Weed removal medicinal fertilizer gross weight.
3. Weed removal medicinal fertilizer for paddy rice according to claim 1, wherein said carrier fertilizer are one of urea, ammonium sulfate or their mixture, and its nitrogen nutrient total content is the 12%-25% of Weed removal medicinal fertilizer gross weight.
4. according to the Weed removal medicinal fertilizer for paddy rice of claim 1, wherein said safener is 4,6-two chloro-2-phenyl-pyrimidines.
5. the manufacture method of a Weed removal medicinal fertilizer for paddy rice: by the Weed removal medicinal fertilizer gross weight, the former medicine of 0.02%-0.15% benbbensulfuronmethyl, the former medicine of the 0.10%-1.0% third careless amine, the 0.20%-1.0% tensio-active agent, the 0.06%-0.5% safener, the mixed solution of 0.5%-2.0% solubility promoter mixes in airtight whipping appts with carrier fertilizer and the filler of 40%-65%, mixture is obtained stable fertilizer granules through the coating granulation, after the assay was approved, carry out finished product packing, the powder sieving thing turns back to mixed processes after crushed, wherein said tensio-active agent is one of methyl sodiosul foaliphatate or styrenated phenol Soxylat A 25-7 or their mixture, and described solubility promoter is the N-N-methyl-2-2-pyrrolidone N-, tetramethylene sulfone, one of methyl alcohol or their mixture.
6. manufacture method according to claim 5, fertilizer granules through the benbbensulfuronmethyl third careless amine of coating granulation gained, wherein benbbensulfuronmethyl content is the 0.02%-0.15% of Weed removal medicinal fertilizer gross weight, and the third careless amine content is 0.10%-1.0%, and the nitrogen nutrient total content is 12%-25%.
7. manufacture method according to claim 5, the available nutrient that wherein said carrier fertilizer is contained is one of urea, ammonium sulfate or their mixture, its nitrogen nutrient total content is the 12%-25% of Weed removal medicinal fertilizer gross weight.
8. manufacture method according to claim 5, wherein said safener are 4,6-two chloro-2-phenyl-pyrimidines, and content is the 0.06%-0.5% of Weed removal medicinal fertilizer gross weight.
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102010264A (en) * | 2010-10-15 | 2011-04-13 | 湖南省中科农业有限公司 | Rice herbicide fertilizer and preparation method thereof |
| CN102640686A (en) * | 2012-03-29 | 2012-08-22 | 成都邦农化学有限公司 | Pesticide application method for controlling weeds in paddy field |
| CN102627508B (en) * | 2012-04-26 | 2014-08-06 | 广西乐土生物科技有限公司 | Transplanted rice field pesticide-weeding pesticide-fertilizer mixed agents and production method and application thereof |
| CN102674973B (en) * | 2012-05-28 | 2014-07-02 | 广西乐土生物科技有限公司 | Herbicide-fertilizer for direct-seeding rice field and production method of herbicide-fertilizer |
| CN102942416B (en) * | 2012-11-26 | 2014-04-16 | 李建明 | Rice medicine fertilizer and production method thereof |
| CN103214301B (en) * | 2013-03-25 | 2016-05-11 | 广东中迅农科股份有限公司 | Granule of a kind of dichloro quinolinic acid and bensulfuron-methyl and preparation method thereof |
| CN104447094A (en) * | 2014-12-11 | 2015-03-25 | 广西乐土生物科技有限公司 | Rice fertilizing/weeding/molluscidal labor-saving fertilizer containing bensulfuron-methyl and pretilachlor and production method of fertilizer |
| CN105746559A (en) * | 2016-03-31 | 2016-07-13 | 太仓市璜泾新联农机作业专业合作社 | Long-acting herbicide for paddy field and preparation method thereof |
| CN112825861A (en) * | 2021-02-04 | 2021-05-25 | 四川眉山凯尔化工有限公司 | Compound pesticide herbicide |
| CN114680108A (en) * | 2022-05-07 | 2022-07-01 | 中国水稻研究所 | Granule for improving control effect of herbicide, preparation method and application thereof |
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Application publication date: 20071010 Assignee: Guangxi Letu Biological Technology Co., Ltd. Assignor: Lv Kunming|Liao Kexiang Contract record no.: 2013450000057 Denomination of invention: Weed removal medicinal fertilizer for paddy rice, and fabricating method Granted publication date: 20100609 License type: Exclusive License Record date: 20130704 |
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