CN102249748B - Method for promoting crop straw to become efficiently decomposed by use of alkaline residues and application thereof - Google Patents
Method for promoting crop straw to become efficiently decomposed by use of alkaline residues and application thereof Download PDFInfo
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Abstract
A method for promoting crop straw to become efficiently decomposed by the use of alkaline residues and an application thereof. The method provided by the invention comprises the following steps of: crushing the straw and adjusting the water content to 60-70 wt%, adding inocula with uniformly mixing, adjusting the carbon/nitrogen ratio to 20-30 by the use of urea, adding alkaline residues which account for 5-15 wt% of the above mixture, culturing the materials in airtight condition for 50-60 days, ventilating once three days for 5-15 minutes each time, and adjusting the water content within 60-70 wt% during the period. According to the test, peanuts and rice straw are used as raw materials, two inocula are selected, and different levels of alkaline residues are respectively added; the promotion effect of adding different levels of alkaline residues under the condition of constant temperature incubation on the efficient decomposition of straw is studied, so as to provide an appropriate chemical additive for the aerobic composting of straw and raise the agricultural utilization value of straw.
Description
Technical field
The invention belongs to the agricultural crop straw processing technology field, relate in particular to a kind of alkaline residue that utilizes and promote method and application that agricultural crop straw becomes thoroughly decomposed.
Background technology
Annual approximately 700,000,000 tons the agricultural crop straw that produces of China, major part all is not used effectively.Compost then is the effective means of utilizing stalk resource.In recent years, more scholar seeks the method that promotes that compost efficiently becomes thoroughly decomposed from improving compost environment, substance, joining approach such as executing microbial inoculum.Mu Ke Jun etc. studies show that, with FeSO
4The relative blank increase of pig manure straw compost total nitrogen content 5.3%, NO for additive treating
3-N content increases respectively 969mg.kg
-1, have obvious guarantor's nitrogen effect, improve compost quality.The inoculation microbial inoculum can make compost material reach a high temperature fast, control the generation of foul smell in the composting process, shortens the compost maturity process.Zhao Jingyin etc. add microbial preparation EM in chicken manure, significantly improve organic substance and retention rate nitrogen in the compost, reduce the gaseous loss of nitrogen.But present most of result cooperates unclassified stores as subjects take stalk, and less for stalk fiting chemical additive report.Alkaline residue is as industry byproduct, and its enormous amount does not all obtain than good utilisation always.And contain the required Ca of a large amount of farm crop, Mg, Si, the multiple elements such as K, P in the alkaline residue, and can strengthen the beneficial microorganism activity, promote organic decomposition.
Summary of the invention
The technical problem that solves: the present invention is directed to the low problem of present agricultural crop straw utilization ratio, a kind of method and application in paddy rice, peanut stalk are processed thereof that utilizes alkaline residue to promote that agricultural crop straw efficiently becomes thoroughly decomposed is provided.
Technical scheme: utilize alkaline residue to promote the method that agricultural crop straw efficiently becomes thoroughly decomposed, it is characterized in that: first with crushed stalk and regulate water content to 60～70%wt, add the microbial inoculum mixing, regulate carbon/nitrogen ratio to 20～30 with urea, add the alkaline residue that accounts for said mixture quality 5～15% again, streams closed was cultivated 50～60 days, ventilation once every three days, each ventilation 5～15 minutes, during regulate water content and remain on 60～70%wt.
Described microbial inoculum is liquid EM bacterium or solid-state bacterium.
The application of aforesaid method in processing rice straw or peanut stalk.
The application of aforesaid method in processing rice straw, the addition of described alkaline residue is 5% of mixture quality, the microbial inoculum that applies is liquid EM bacterium.
The application of aforesaid method in processing the peanut stalk, the addition of described alkaline residue accounts for 15% of mixture quality, and the microbial inoculum that applies is solid-state bacterium.
Beneficial effect: it is raw material that peanut and rice straw are adopted in this test, and (solid-state microbial inoculum name is called straw decomposing inoculant, and main component comprises microorganism, wheat bran, straw powder, inorganic salt to select two kinds of microbial inoculums; Liquid EM microbial inoculum, main component is: the microorganisms such as photosynthetic bacterium, lactobacillus, yeast flora, actinomycete group, thread flora), add respectively again the different levels alkaline residue, research different levels alkaline residue adds the facilitation effect that stalk is efficiently become thoroughly decomposed under the constant temperature culture condition, for the aerobic compost of stalk provides suitable chemical additive, improve the stalk agricultural use and be worth.
In the rice straw treating processes:
Each pH that processes all between 8～9, is slight alkalinity, reaches the straw decomposing index.Cooperate solid fungicide that the raising of full phosphorus is had better effects, the EM microbial inoculum is then more obvious to full potassium content raising effect, and wherein the full phosphorus of 5% and 15% alkaline residue, full potassium and total nitrogen content all are in higher level.15% alkaline residue cooperates the humic acids content of solid fungicide, EM microbial inoculum all to reach the higher level of this experiment, is respectively 83.1,83.3g.kg
-1, improve respectively 28.4%, 28.7% with respect to blank, and humic acid content reaches respectively 68.24,48,22g.kg
-1, illustrate that a large amount alkaline residue is to the formation best results of straw decomposition product humic acids.The GI value of contrast is lower than 50%, and three groups of GI value major parts of processing take alkaline residue as additive reach more than 80%, illustrates that the alkaline residue interpolation not only promotes straw decomposing, also effectively eliminates the toxic action that straw decomposition produces.The GI that 5% and 10% alkaline residue is processed is higher, reaches respectively 92.5% and 83.45%, illustrates that low amount alkaline residue just can reach well short rice straw and become thoroughly decomposed and innoxious effect.Comprehensive this test-results shows: 5% alkaline residue cooperates microbial inoculum best to the rice straw promoter action of efficiently becoming thoroughly decomposed.
In peanut stalk treating processes:
The equal slight alkalinity of pH that each is processed, suitable microbial growth.The humic acids content that 5% and 15% alkaline residue is processed is respectively 98.45 and 97.42g.kg
-1, be higher than blank, and this Hu Fu of two groups ratio being on close level, E4/E6 is all lower, shows that low amount and a large amount alkaline residue are to the formation best results of straw decomposition product humic acids.The GI value of control treatment all is lower than 50%, but after adding alkaline residue, and along with the raising of its consumption, GI is and increases progressively trend, and when the alkaline residue consumption was 15%, GI was 80.17, reached to become thoroughly decomposed and innoxious standard.Comprehensive this experimental result shows: 15% alkaline residue cooperates microbial inoculum best to the effect of efficiently becoming thoroughly decomposed of peanut stalk.
Description of drawings
Fig. 1 is that different alkaline residue additions are on impact (humic acids (HE, the g.kg of rice straw decomposition product humic acids and character thereof
-1));
Fig. 2 is that different alkaline residue additions are on impact (humic acid (HA, the g.kg of rice straw decomposition product humic acids and character thereof
-1));
Fig. 3 is that different alkaline residue additions are on the impact (Hu Fu ratio) of rice straw decomposition product humic acids and character thereof;
Fig. 4 is that different alkaline residue additions are on the impact (optical density(OD) (E4/E6)) of rice straw decomposition product humic acids and character thereof;
Fig. 5 is that different alkaline residue additions are on the impact of rice straw compost germination index;
Fig. 6 is that different alkaline residue additions are on the impact of peanut straw decomposition product germination index (GI).
Embodiment
1 materials and methods
1.1 test materials
Rice straw is taken from Yingtan red soil station, Jiangxi Province, its carbon containing 403.79g/kg, nitrogen 6.37g/kg, phosphorus 0.88g/kg, potassium 21.21g/kg; Alkaline residue pH is 11.48, calcic 179.4g/kg, magnesium 79.17g/kg, phosphorus 0.29g/kg, copper 12.03mg/kg, zinc 79.47mg/kg, cadmium 0mg/kg, and its heavy metal content is far below national standard of soil environment quality requirement; This experiment is chosen two kinds of composite fungus agents for examination, is respectively liquid EM bacterium, the solid-state bacterium that blue sky, Jurong clear water company provides.
1.2 test method
This experiment arranges blank, CK, and three horizontal alkaline residue additions cooperate totally 9 processing (table 1) of two kinds of microbial inoculums, employing constant incubator, 30 ℃ of constant temperature aerated culture.The rice straw of at first 80g being pulverized is regulated water content to 65% with distilled water, meanwhile adds the microbial inoculum mixing, for reaching the required best C/N of microorganism growth, regulates it to 25 with urea, adds at last the alkaline residue of three horizontal additions.Place incubator to cultivate 54 days on the 500mL uncovered culturing bottle that material is housed, ventilation was once ventilated 10 minutes at every turn every three days, and regulated water content with distilled water and (reach hand and hold agglomeratingly, open i.e. loose state) about 65%.Material is cultured to 54 days, and with its mixing and the approximately 60g that takes a sample, wherein 20g is air-dry for subsequent use.
Table 1 test is processed and is arranged
1.3 analytical procedure
The pH of straw decomposition product, water content and nutrient according to document [Lu Rukun. the soil agrochemistry analytical procedure. Beijing: Scientia Agricultura Sinica press, 1999] method that provides measures.Wherein full phosphorus employing nitric acid-perchloric acid disappears and boils-molybdenum-antimony anti-spectrophotometric method, and full potassium adopts nitric acid-perchloric acid to disappear and boils-flame photometry, and full nitrogen adopts Kjeldahl determination.
Soil ulmin forms and humic acids carbon adopts 0.1mol trisodium phosphate and 0.1mol sodium hydroxide extraction, TOC instrument carbon determination.E4/E6 adopts spectrophotometer method.
Seed germination index (GI) is measured with reference to the method for Zhang Xiaoping, with distilled water local radish seed is rinsed well first, and is got the moisture that thieving paper blots seed-coat behind the seed soaking 4h.Get 5g (dry weight basis) compost material, namely get vat liquor with distilled water by filtering after material-water ratio=1: 5 vibration half an hour.Draw the 10.0mL vat liquor and be added in the culture dish of the 9cm that is covered with 2 layers of qualitative filter paper, evenly put into 20 radish seeds in every culture dish, take distilled water as blank.In 28 ℃ of constant incubators, cultivate 72h, measure rate of emergence and root long.
The public calculation formula of germination index is as follows:
Germination index (GI)=(average root of the percentage of germination of processing * processing is long)/(average root of blank percentage of germination * blank is long) * 100%
2 results and analysis
2.1 different alkaline residue additions are on the impact of straw decomposition product pH
Table 2 is processed the pH value of lower rice straw decomposition product for using the different levels alkaline residue.It is generally acknowledged organic materials and in decay process, produce NH owing to containing the N material decomposition
3, cause the decomposition product to be in little alkali state.Add the lower pH value difference of different levels alkaline residue processing not little, all between 8-9 (table 2) belongs to slight alkalinity, meets the straw decomposing standard.
The pH of table 2 different treatment
2.2 different alkaline residue additions are on the impact of straw decomposition product nutrient content
As known from Table 3, solid fungicide is more remarkable to the raising effect of full phosphorus, total nitrogen content, and the EM microbial inoculum is more obvious to the raising of full potassium content.Each full phosphorus of processing, full potassium and total nitrogen content are all than rice straw original value (0.88,21.21 and 6.73g.kg
-1) height, significant difference between individual processing, this is because stalk is weightless in decay process, and full phosphorus, full potassium absolute content are constant, thus cause the raising of its relative content.The content of tatal phosphorus that adds the processing of 5% alkaline residue is higher, is 2.11g/kg.Full potassium content then is that 15% alkaline residue is higher, is cooperating two kinds of microbial inoculums to be respectively 36.45 and 42.73g/kg under processing.As shown in Table 3, the total nitrogen content that 5% and 15% alkaline residue is processed is higher, contrasts high 5.6%-7.4%, and rice straw decomposition product nutrient level is better.
The different alkaline residue additions of table 3 are on the impact of straw decomposition product nutrient content
2.3 different additive forms the straw compost soil ulmin and the impact of character
Soil ulmin is the important factor that affects soil ecology, crumb structure, soil fertility and plant-growth, so humic acids content and composition are the important indicators of stalk fertilizer efficiency, the humic acids composition also is one of straw decomposing index simultaneously.Most of humic acids content of processing is high than blank as seen from Figure 1, particularly cooperate the processing 3 of two kinds of microbial inoculums all to reach the higher level of this experiment, be respectively 83.1,83.3g/kg, improve respectively 28.4%, 28.7% with respect to blank, illustrate that a large amount alkaline residue is to the formation best results of straw decomposition product humic acids.
Humic acid (HA) content that the major part of two groups of interpolation microbial inoculums is processed is all high by 3.7%～69.2% than blank.Cooperate the processing 3 of solid fungicide and the processing 1 of EM microbial inoculum, its HA content is respectively 50.1 and 68.2g.kg
-1(Fig. 2), be the higher level of this processing, particularly last HA/FA (Fig. 3) that processes reaches more than 4.Humic acids is comprised of Humic acids and fulvic acids, and the size of Hu Fu ratio can show the quality of humic acids, illustrates that above two kinds of processing not only can carry decomposition product content of humic acid, can also be from improving in essence the humic acids quality.
As the important indicator of humic acid quality or condensation degree, aromatization degree, E4/E6 ratio is lower usually for E4/E6, shows that the condensation degree of soil ulmin and aromatization degree are higher, and average retention time is longer.Become thoroughly decomposed phase humic acid E4/E6 ratio generally about 12.As known from Table 4, each is processed the E4/E6 value and all is lower than 12.The E4/E6 optical density value of joining the processing 3 of executing the EM microbial inoculum is minimum, reaches 8.81, and the humify level of the straw decomposition product of this processing is higher.
2.4. the straw decomposition product is on the impact of GI
Seed germination experiment is to measure the directly a kind of of compost or decomposition product phytotoxicity and attached effect and method fast.It has been generally acknowledged that, when GI＞50%, stalk becomes thoroughly decomposed, and GI between 80%～85% as straw decomposing toxicological harmless index.As shown in Figure 5, cooperate three groups of GI major parts of processing of two kinds of microbial inoculums to be higher than 80%, and singly with CK and the blank of microbial inoculum, GI is lower than 50%, does not reach the GI standard of becoming thoroughly decomposed.Illustrate and add the quick composting that alkaline residue can not only promote stalk, can also effectively eliminate the toxic action that straw decomposition produces.Cooperate three groups of increase GI values of processing along with the alkaline residue consumption of EM bacterium to reduce, GI is 63.68% when the alkaline residue consumption is 15%, be lower than the compost safety index, and the GI value of 5% and 10% alkaline residue consumption reaches respectively 92.5% and 83.45%, show the low toxic action that alkaline residue can be eliminated the straw decomposition generation of measuring, reach innoxious standard.
3. conclusion
Each pH that processes all between 8～9, is slight alkalinity, reaches the straw decomposing index.
Each full phosphorus of processing, full potassium content are all high than the initial nutrient content of stalk, and this is because straw decomposition weightlessness causes.Wherein cooperate the straw decomposition product content of tatal phosphorus of solid fungicide higher, cooperate the EM bacterium then to tend to full potassium.All in all, each nutrient content level of 5% alkaline residue and 15% alkaline residue processing all is in higher level.
15% alkaline residue cooperates the humic acids content of solid fungicide, EM microbial inoculum all to reach the higher level of this experiment, be respectively 83.1,83.3g/kg, improve respectively 28.4%, 28.7% with respect to blank, and humic acid content reaches respectively 68.24,48,22g/kg illustrates that a large amount alkaline residue is to the formation best results of straw decomposition humic acids.
The GI value of contrast is lower than 50%, and three groups of GI value major parts of processing take alkaline residue as additive reach more than 80%, illustrates that the alkaline residue interpolation not only promotes straw decomposing, also effectively eliminates the toxic action that straw decomposition produces.The GI that 5% and 10% alkaline residue is processed is higher, reaches respectively 92.5% and 83.45%, illustrates that low amount alkaline residue just can reach well short becoming thoroughly decomposed and innoxious effect.
Comprehensive this test-results shows: 5% alkaline residue cooperates microbial inoculum best to the stalk promoter action of efficiently becoming thoroughly decomposed.
1 materials and methods
1.1 test materials
The peanut stalk is taken from Yingtan red soil station, Jiangxi Province, its carbon containing 359.86g/kg, nitrogen 10.95g/kg, phosphorus 1.54g/kg, potassium 14.81g/kg; Alkaline residue PH is 11.48, calcic 179.4g/kg, magnesium 79.17g/kg, phosphorus 0.29g/kg, copper 12.03mg/kg, zinc 79.47mg/kg, cadmium 0mg/kg, and heavy metal content is far below national standard of soil environment quality requirement.This experiment provides solid-state bacterium by blue sky, Jurong clear water company.
1.2 test method
This experiment arranges blank, and CK and three horizontal alkaline residue addition totally 5 processing (table 1) are adopted constant incubator, 30 ℃ of constant temperature aerated culture.The peanut stalk of at first 80g being pulverized is regulated water content to 65% with distilled water, meanwhile adds the microbial inoculum mixing, for reaching the required best C/N of microorganism growth, regulates it to 25 with urea, adds at last the alkaline residue of three horizontal additions.Place incubator to cultivate 54 days on the 500ml uncovered culturing bottle that material is housed, smash every three days and turn over ventilation once, ventilated 10 minutes at every turn, and regulate water content with distilled water and about 65%, (reach hand and hold agglomeratingly, open i.e. loose state).Material is cultured to 54 days, and with its mixing and the approximately 60g that takes a sample, wherein 20g is air-dry for subsequent use.
Table 1 test is processed and is arranged
| Project | Process |
| Contrast | Stalk+water |
| CK | Stalk+ |
| 1 | Stalk+microbial inoculum+5% |
| 2 | Stalk+microbial inoculum+10% |
| 3 | Stalk+microbial inoculum+15% alkaline residue |
1.3 analytical procedure
The mensuration of pH according to document [Lu Rukun. the soil agrochemistry analytical procedure. Beijing: Scientia Agricultura Sinica press, 1999] method that provides carries out.
Soil ulmin forms and humic acids carbon adopts 0.1mol trisodium phosphate and 0.1mol sodium hydroxide extraction, TOC instrument carbon determination.E4/E6 adopts spectrophotometer method.
Seed germination index (GI) measuring method is: with distilled water radish seed is rinsed well first, and got the moisture that thieving paper blots seed-coat behind the seed soaking 4h.Get 5g (dry weight basis) compost material, namely get vat liquor with distilled water by filtering after material-water ratio=1: 5 vibration half an hour.Draw the 10.0mL vat liquor and be added in the culture dish of the 9cm that is covered with 2 layers of qualitative filter paper, evenly put into 20 radish seeds in every culture dish, take distilled water as blank.In 28 ℃ of constant incubators, cultivate 72h, measure rate of emergence and root long.The public calculation formula of germination index is as follows:
Germination index (GI)=(average root of the percentage of germination of processing * processing is long)/(average root of blank percentage of germination * blank is long) * 100%
2. results and analysis
2.1 the flat impact on straw decomposition product pH of Different Alkali pulp water
When pH reaches little buck at ordinary times, be fit to microbial growth, can be used as and estimate the reference index of becoming thoroughly decomposed.As can be seen from Table 2, it is flat that each PH that processes is in little buck, substantially reaches the straw decomposing standard.
The PH of table 2 different treatment
2.2 different alkaline residue additions are on the impact of straw decomposition product soil ulmin and character thereof
Soil ulmin is the important factor that affects soil ecology, crumb structure, soil fertility and plant-growth, so humic acids content and composition are the important indicators of compost fertilizer efficiency in the compost, to form also be one of straw decomposing index to humic acids simultaneously.Humic acids and humic acid content all show as 5% alkaline residue＞15% alkaline residue＞10% alkaline residue, and is higher by 44%～68.2% than blank.Three groups of Hu Fu ratios of processing are on close level, and are respectively 37.45,37.87 and 37.70, illustrate that low amount and a large amount alkaline residue can improve the quality of remarkable peanut straw decomposition product.As the important indicator of humic acid quality or condensation degree, aromatization degree, E4/E6 ratio is lower usually for E4/E6, shows that the condensation degree of soil ulmin and aromatization degree are higher, and average retention time is longer.Become thoroughly decomposed phase humic acid E4/E6 ratio generally about 12.As known from Table 3, each processes the E4/E6 value, and all to be lower than the E4/E6 value that 12,5% alkaline residues and 10% alkaline residue process lower, is respectively 6.61 and 6.43.
The different alkaline residue additions of table 3 are on the impact of soil ulmin and character thereof
2.3 different alkaline residue additions are on the impact of peanut straw decomposition product germination index
Germination index is the most frequently used method of research straw decomposing.As shown in Figure 6, three groups of GI that process are apparently higher than contrast, and more than 50%, in general, reach when compost GI＞50% and become thoroughly decomposed, and CK and contrast all do not reach this index, illustrate effectively to have promoted becoming thoroughly decomposed of peanut stalk take alkaline residue as additive.In three processing horizontals, raising along with the alkaline residue level, GI is and increases progressively trend, when the alkaline residue consumption is 15%, GI is 80.17, is in higher level, reaches innoxious standard, show a large amount alkaline residue not only to the short successful that becomes thoroughly decomposed of peanut stalk, and can effectively remove the toxic action that produces in its decay process.
3. conclusion
3.1 the equal slight alkalinity of pH that each is processed, suitable microbial growth.
The humic acids content that 3.25% and 15% alkaline residue is processed is respectively 98.45 and 97.42g.kg
-1, be higher than blank, and two groups of Hu Fu ratios of processing being on close level, E4/E6 is all lower, shows that low amount and a large amount alkaline residue are to the formation best results of straw decomposition product humic acids.
3.3 the GI value of control treatment all is lower than 50%, but after adding alkaline residue, along with the raising of its level, GI is and increases progressively trend, and when the alkaline residue consumption was 15%, GI was 80.17, reached to become thoroughly decomposed and innoxious standard.
3.4 comprehensively this experimental result shows: 15% alkaline residue cooperates microbial inoculum best to the effect of efficiently becoming thoroughly decomposed of peanut stalk, can consider for the composting technology reference.
Claims (3)
1. utilize alkaline residue to promote the method that agricultural crop straw efficiently becomes thoroughly decomposed, it is characterized in that: first with crushed stalk and regulate water content to 60～70%wt, add liquid EM bacterium or solid-state straw decomposing inoculant mixing, regulate carbon/nitrogen to 20～30 with urea, add the alkaline residue that accounts for said mixture quality 5～15% again, streams closed was cultivated 50～60 days, ventilation once every three days, each ventilation 5～15 minutes, during regulate water content and remain on 60～70%wt.
2. the application of the described method of claim 1 in processing rice straw or peanut stalk.
3. the alkaline residue that utilizes according to claim 2 promotes the application of method in processing rice straw that agricultural crop straw efficiently becomes thoroughly decomposed, and it is characterized in that the addition of described alkaline residue is 5% of mixture quality, and the microbial inoculum that applies is liquid EM bacterium.
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| CN102701869B (en) * | 2012-06-27 | 2014-02-19 | 中国科学院南京土壤研究所 | Crop straw leach liquor for improving fertilizer efficiency of mycorrhizal fungi fertilizer and preparation method of crop straw leach liquor |
| CN102976803A (en) * | 2012-12-12 | 2013-03-20 | 中国科学院南京土壤研究所 | Additive for accelerating crop straws to efficiently maturate and application thereof |
| CN108164371B (en) * | 2018-02-28 | 2024-02-02 | 中国科学院南京土壤研究所 | Straw corrosion promotion method and application thereof in acid soil improvement |
| CN108358693B (en) * | 2018-02-28 | 2020-11-24 | 中国科学院南京土壤研究所 | Foliar fertilizer for increasing calcium content in rice grains and preparation method and application thereof |
| CN108329487B (en) * | 2018-02-28 | 2019-02-26 | 南昌工程学院 | A kind of method and application of the extracted humic acid from stalk |
| CN110746220A (en) * | 2019-11-18 | 2020-02-04 | 大连理工大学 | Method for promoting straw decomposition in field returning by urea-alkali composite medicament |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1405269A (en) * | 2001-12-18 | 2003-03-26 | 中国科学院长春地理研究所 | Method for rapidly increasing soil organic matter of dry-farming land |
| CN1493550A (en) * | 2003-08-26 | 2004-05-05 | 洁 谷 | Method of producing bioorganic fertilizer using agricultural waste material |
| CN1552674A (en) * | 2003-06-02 | 2004-12-08 | 郭淑华 | Asiatic ginseng active compound fertilizer |
| CN101289268A (en) * | 2008-05-30 | 2008-10-22 | 李肇忠 | Process for dehydrating activated sludge by waste alkaline residue/alkali liquor |
| CN101381247A (en) * | 2008-08-29 | 2009-03-11 | 东莞市大众农业科技有限公司 | Sulphate-potassium magnesium fertilizer and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1405269A (en) * | 2001-12-18 | 2003-03-26 | 中国科学院长春地理研究所 | Method for rapidly increasing soil organic matter of dry-farming land |
| CN1552674A (en) * | 2003-06-02 | 2004-12-08 | 郭淑华 | Asiatic ginseng active compound fertilizer |
| CN1493550A (en) * | 2003-08-26 | 2004-05-05 | 洁 谷 | Method of producing bioorganic fertilizer using agricultural waste material |
| CN101289268A (en) * | 2008-05-30 | 2008-10-22 | 李肇忠 | Process for dehydrating activated sludge by waste alkaline residue/alkali liquor |
| CN101381247A (en) * | 2008-08-29 | 2009-03-11 | 东莞市大众农业科技有限公司 | Sulphate-potassium magnesium fertilizer and preparation method thereof |
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