CN105037014A - South red soil dry land nutrient dilatation conditioner and preparing method thereof - Google Patents
South red soil dry land nutrient dilatation conditioner and preparing method thereof Download PDFInfo
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Abstract
The invention provides a preparing method of south red soil dry land nutrient dilatation conditioner. The conditioner is prepared from, by weight, 25-35% of raw material zeolite, 10-15% of coal cinder, 14-20% of carbonizational husks, 12-17% of coal ash, 17-23% of decomposed coal and 3-8% of polyacrylamide in a blending and pelleting mode. By means of the prepared conditioner, the adsorption capacity of soil to nutrients can be greatly increased, the adsorption ability of soil to nutrients can be enhanced, the physical structure of soil can be obviously improved, the soil acidiy can be adjusted, contradiction among soil water, air and nutrient substances is coordinated, and the conditioner can be widely applied to south red soil dry land and provide a good basis for the high and stable yield of crops.
Description
Technical field
The invention belongs to soil agrochemistry field, be specifically related to a kind of preparation method of Southern Red Soil nonirrigated farmland nutrient dilatation amendment.
Background technology
Red soil is one of southern In The Soils, distributes in zonality, by the impact of soil parent material, the factors of soil formation, general moisture and nutrient storage capacity less, cation exchange capacity is at about 5cmol/kg, acid heavy, leak Lous fertilizer, barrenr, and Agricultural Output rate is lower.But such SOIL DISTRIBUTION is wide, area is large, and aboundresources, is improved by the application of the various technology of agricultural, product, fostered and apply fertilizer, and can become the important production base of subtropics cash crop and forest, fruit tree, production potential are very large.
Due to the soil water, to support storage capacity less in Southern Red Soil nonirrigated farmland, fertilizer and fertilizer-preserving ability poor, between nutrient and water, gas, the contradiction such as inharmonious, so crop root growth is poor, vigor is low and crop nutrition content assimilated efficiency is not high, causes agriculture big area balanced increase production to be restricted.Conventional solution is that organic fertilizer or farm manure carry out fertilizing soil; but fertilizer have take effect slow; the shortcomings such as quantity is large, source is unstable, specificity is poor and action effect is limited; especially at present large-scale cultivation causes red soil region fertilizer input quantity to reduce year by year, makes this contradiction.Therefore, soil conditioner, as one of soil improvement, the important measures of fostering and apply fertilizer, is more and more taken seriously and accepts.
At present, CN101445730A discloses a kind of soil structure conditioner for red-yellow soil, CN1304973A discloses a kind of soil conditioning agent without deep ploughing, CN102911671A discloses a kind of preparation method of the soil conditioner based on rice hull waste, these technology are all effective to red soil structural improvement, and limited to soil nutrients and soil capacity enlargement effect.
Summary of the invention
For the deficiencies in the prior art, the present invention by screening a large amount of sorbing material, structural improvement material and acid adjustment material, composite and repetition test, there is provided one significantly can improve Cation Exchange Capacity in Soils, effective increase Nutrient absorption amount, Soil structure and the Southern Red Soil nonirrigated farmland nutrient dilatation amendment making full use of agriculture and industry waste can be improved again, further, provide the preparation method of this amendment, further, the using method of this amendment is provided.
A kind of soil nutrient dilatation amendment of the present invention, comprises following raw material: zeolite 25% ~ 35%, cinder 10% ~ 15%, carbonized rice husks 14% ~ 20%, flyash 12% ~ 17%, weathered coal 17% ~ 23%, polyacrylamide 3%-8% by weight percentage.
Preferably, the molecular weight of described polyacrylamide is 300-500 ten thousand.
Preferably, described polyacrylamide is anionic polyacrylamide.
Preferably, described soil nutrient dilatation amendment is particulate state.
The present invention further also provides the preparation method of described soil nutrient dilatation amendment, and it comprises the steps:
Step 1: prepare carbonized rice husks;
Step 2: carbonized rice husks is pulverized together with zeolite, cinder;
Step 3: add flyash, weathered coal in the material after pulverizing, fully mix, obtain mixture;
Step 4: carry out granulation to described mixture, adds appropriate binding agent, after master batch is shaping, adds polyacrylamide, obtain shaped granule in granulation process;
Step 5: dried by described shaped granule, sieves out the particle that particle diameter is 2mm ~ 5mm, namely obtains Southern Red Soil nonirrigated farmland nutrient dilatation amendment.
Preferably, the carbonized rice husks in described step 1 is obtained by following methods: husk is carried out high temperature cabonization, and temperature controls at 500 ~ 600 DEG C, and carbonization time is 8 ~ 20h, and cooling, obtains carbonized rice husks.
Preferably, described carbonization time is 12h.
Preferably, described binding agent be attapulgite, wilkinite, slaked lime, sesbania powder, desulfurated plaster, any one of the plaster of paris or its arbitrary combination; More preferably, described binding agent is any one in attapulgite, wilkinite or its combination.
Preferably, the feed postition of described polyacrylamide is: be sprayed onto after polyacrylamide is water-soluble in tablets press; Or, polyacrylamide is spread in tablets press in powder form.
Further, the invention provides the using method of Southern Red Soil dryland soil nutrient dilatation amendment: method of application is disposable bottom application; Amount of application is determined according to applicable object.Such as, when grain and oil crop, the cash crop such as plantation peanut, legume crop, sesame and cassava, amount of application is: every mu of 50 ~ 100kg; When whole ground, spread fertilizer over the fields in soil surface, shallowly to turn over.When raising fruit trees, amount of application is: every mu of 100 ~ 150kg, and full garden is spread fertilizer over the fields; Or in conjunction with fertilizer ditch spread under tree crown drip.
Compare with texture modifier or modification method with Upland Red Soil acid soil improving agent of the prior art, the present invention adopts the beneficial effect of technique scheme to be:
1, the present invention significantly can improve Cation Exchange Capacity in Soils, effectively increases soil to the adsorptive power of nutrient and adsorptive capacity.This is because, to after a large amount of Nutrient absorption material screening, the present invention is by finding that zeolite, weathered coal and cinder have stronger characterization of adsorption to npk nutrient, this research shows, every gram of zeolite can adsorb 12.41 milligrams of purity nitrogens and 15.8 milligrams of pure potassium, every gram of weathered coal can adsorb 3.25 milligrams of pure phosphorus, and cinder also can adsorb a certain amount of nitrogen, potassium.Can significantly improve Cation Exchange Capacity in Soils in being manured into soil in rational ratio mixing by these three kinds of materials, significantly increase the adsorptive capacity to npk nutrient, in addition, in the present invention, flyash and PAM also have certain absorption property to N P and K.
2, the present invention significantly can reduce the soil weight, increase soil porosity and macro aggregate ratio, coordinate soil moisture, temperature, relation between air and nutritive substance, be conducive to root system movable and absorb water and nutrient, for growth and development of plants provides good condition.This is because PAM of the present invention, weathered coal, carbonized rice husks and flyash all significantly can reduce the soil weight, increase soil porosity and macro aggregate ratio, wherein relative with PAM effect best with carbonized rice husks in increase soil porosity, relative with weathered coal best with PAM in raising macro aggregate ratio.In addition, the PAM in the present invention, weathered coal, carbonized rice husks and flyash have water suction and water retention property strongly, and wherein PAM is that arid biogeographic zone applies more water-keeping material; The water regain of weathered coal, carbonized rice husks and flyash is all more than one times of material itself.Red soil structure can be effectively improved after the present invention is composite by a certain percentage by PAM, weathered coal, carbonized rice husks and flyash four kinds of materials and grittiness material zeolite and cinder; regulate soil three phases (solid phase: liquid phase: gas phase); coordinate soil moisture, temperature, relation between air and nutritive substance; prevent seepage and the loss of fertilizer; improve Upland Red Soil preserve moisture and fertility performance and fertilizer nutrient utilization, available protecting ecotope.
3, the present invention effectively can improve the soil fertility of Upland Red Soil, promotes Land capability.This is because, as mentioned above, the increase of Cation Exchange Capacity in Soils, Soil structure improves, the enhancing of soil water-reataining fertilizer-keeping ability, the coordination between the soil water, fertilizer, gas, heat, and fertility can be improved naturally; Secondly, the weathered coal in the present invention, carbonized rice husks and flyash, all containing mass efficient nutrient, effectively can improve the nutrient content in soil after being manured into soil; Again, weathered coal in the present invention, carbonized rice husks, flyash, cinder and PAM are organic materials, significantly soil organic carbon can be increased after being manured into soil, strengthen Soil Microorganism content and mobility thereof, improve the ratio of nutrient and the speed of microorganism turnover nutrient such as microorganism mortgage nitrogen phosphorus sulphur, indirectly promote soil fertility.
4, the amendment that prepared by the present invention belongs to basic prod, and pH value is 8.67, can regulate the pH value of southern dry land acidic soil, in and free acid, the active aluminum in passivation soil, solves " acid, poison " problem of southern dry land soil.
Accompanying drawing explanation
In order to be illustrated more clearly in the specific embodiment of the invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Figure 1 shows that the schema of the preparation method of a kind of Southern Red Soil nonirrigated farmland nutrient dilatation amendment of the present invention;
Figure 2 shows that the soil profile after executing soil nutrient dilatation amendment and not executing amendment process is cut into slices electron microscope photo scanning (SEM);
Embodiment
Hereafter will describe embodiments of the invention in detail by reference to the accompanying drawings.It should be noted that the combination of technical characteristic or the technical characteristic described in following embodiment should not be considered to isolated, they can mutually be combined thus be reached better technique effect.
Embodiment 1
Step 1: prepare carbonized rice husks
Be placed in by husk in carbide furnace and carry out high temperature cabonization, temperature controls at 500 ~ 600 DEG C, carbonization about 12h, and after carbonization terminates, forced draft cooling, to room temperature, obtains carbonized rice husks.
Step 2: crushing material
To be weight percentage benchmark with the weight of soil nutrient dilatation amendment, get zeolite 30% by weight percentage, cinder 10% and carbonized rice husks 18% are pulverized in pulverizer;
Step 3: mixing of materials
By the material after above-mentioned pulverizing in stirrer, add flyash 12%, weathered coal 20% by weight ratio simultaneously, fully mix, obtain mixture;
Step 4: granulation
Said mixture material is carried out granulation in granulating disc, adds wilkinite 5% simultaneously, after master batch is shaping, adds polyacrylamide 5%.
Step 5: dry and screening
Carried out drying and sieving by above-mentioned shaping particle, return be greater than 5mm to granulation again after pulverizing in disintegrating machine with the particle being less than 1mm, the granule measurement of 2mm-5mm, packaging, obtain target product.
Embodiment 2
Step 1: prepare carbonized rice husks
Be placed in by husk in carbide furnace and carry out high temperature cabonization, temperature controls at 500 ~ 600 DEG C, carbonization about 8h, and after carbonization terminates, forced draft cooling, to room temperature, obtains carbonized rice husks.
Step 2: crushing material
To be weight percentage benchmark with the weight of soil nutrient dilatation amendment, get zeolite 30% by weight ratio, cinder 10% and carbonized rice husks 27% are pulverized in pulverizer;
Step 3: mixing of materials
By the material after above-mentioned pulverizing in stirrer, add weathered coal 20% simultaneously, fully mix, obtain mixture;
Step 4: granulation
Said mixture material is carried out granulation in granulating disc, adds wilkinite 8% simultaneously, after master batch is shaping, adds polyacrylamide 5%.
Step 5: dry and screening
Carried out drying and sieving by above-mentioned shaping particle, return be greater than 5mm to granulation again after pulverizing in disintegrating machine with the particle being less than 1mm, the granule measurement of 2mm-5mm, packaging, obtain target product.
Embodiment 3
Step 1: prepare carbonized rice husks
Be placed in by husk in carbide furnace and carry out high temperature cabonization, temperature controls at 500 ~ 600 DEG C, carbonization about 20h, and after carbonization terminates, forced draft cooling, to room temperature, obtains carbonized rice husks.
Step 2: crushing material
To be weight percentage benchmark with the weight of soil nutrient dilatation amendment, to get zeolite 35% by weight ratio and cinder 10% is pulverized in pulverizer;
Step 3: mixing of materials
By the material after above-mentioned pulverizing in stirrer, add weathered coal 23% and flyash 14% simultaneously, fully mix, obtain mixture;
Step 4: granulation
Said mixture material is carried out granulation in granulating disc, adds wilkinite 10% simultaneously, after master batch is shaping, adds polyacrylamide 8%.
Step 5: dry and screening
Carried out drying and sieving by above-mentioned shaping particle, return be greater than 5mm to granulation again after pulverizing in disintegrating machine with the particle being less than 1mm, the granule measurement of 2mm ~ 5mm, packaging, obtain target product.
Embodiment 4
Step 1: prepare carbonized rice husks
Be placed in by husk in carbide furnace and carry out high temperature cabonization, temperature controls at 500 ~ 600 DEG C, carbonization about 12h, and after carbonization terminates, forced draft cooling, to room temperature, obtains carbonized rice husks.
Step 2: crushing material
To be weight percentage benchmark with the weight of soil nutrient dilatation amendment, get zeolite 32% by weight ratio, cinder 8% and carbonized rice husks 20% are pulverized in pulverizer;
Step 3: mixing of materials
By the material after above-mentioned pulverizing in stirrer, add flyash 12%, weathered coal 20% simultaneously, fully mix, obtain mixture;
Step 4: granulation
Said mixture material is carried out granulation in granulating disc, adds wilkinite 4% simultaneously, after master batch is shaping, adds polyacrylamide 4%.
Step 5: dry and screening
Carried out drying and sieving by above-mentioned shaping particle, return be greater than 5mm to granulation again after pulverizing in disintegrating machine with the particle being less than 1mm, the granule measurement of 2mm ~ 5mm, packaging, obtain target product.
Embodiment 5
Step 1: prepare carbonized rice husks
Be placed in by husk in carbide furnace and carry out high temperature cabonization, temperature controls at 500 ~ 600 DEG C, carbonization about 8h, and after carbonization terminates, forced draft cooling, to room temperature, obtains carbonized rice husks.
Step 2: crushing material
To be weight percentage benchmark with the weight of soil nutrient dilatation amendment, get zeolite 25% by weight ratio, cinder 10% and carbonized rice husks 14% are pulverized in pulverizer;
Step 3: mixing of materials
By the material after above-mentioned pulverizing in stirrer, add flyash 16%, weathered coal 17% simultaneously, fully mix, obtain mixture;
Step 4: granulation
Said mixture material is carried out granulation in granulating disc, adds wilkinite 10% simultaneously, after master batch is shaping, adds polyacrylamide 8%.
Step 5: dry and screening
Carried out drying and sieving by above-mentioned shaping particle, return be greater than 5mm to granulation again after pulverizing in disintegrating machine with the particle being less than 1mm, the granule measurement of 2mm ~ 5mm, packaging, obtain target product.
Embodiment 6
Step 1: prepare carbonized rice husks
Be placed in by husk in carbide furnace and carry out high temperature cabonization, temperature controls at 500 ~ 600 DEG C, carbonization about 20h, and after carbonization terminates, forced draft cooling, to room temperature, obtains carbonized rice husks.
Step 2: crushing material
To be weight percentage benchmark with the weight of soil nutrient dilatation amendment, get zeolite 26% by weight ratio, cinder 15% and carbonized rice husks 20% are pulverized in pulverizer;
Step 3: mixing of materials
By the material after above-mentioned pulverizing in stirrer, add flyash 12%, weathered coal 19% simultaneously, fully mix, obtain mixture;
Step 4: granulation
Said mixture material is carried out granulation in granulating disc, adds wilkinite 0% simultaneously, after master batch is shaping, adds polyacrylamide 8%.
Step 5: dry and screening
Carried out drying and sieving by above-mentioned shaping particle, return be greater than 5mm to granulation again after pulverizing in disintegrating machine with the particle being less than 1mm, the granule measurement of 2mm ~ 5mm, packaging, obtain target product.
Simultaneous test
Using the soil nutrient dilatation amendment of embodiment 1 as sample, a series of test is carried out on peanut to southern dry land nutrient dilatation amendment of the present invention, has achieved good effect.
Test is carried out in Dongxiang County, Jiangxi Province and typical red hills area, Yujiang County, if do not execute amendment and local farmers habits fertilization (CK), local farmers habits fertilization basis enrich on 50kg soil nutrient of the present invention dilatation amendment (CK+T50) and local farmers habits fertilization basis and enrich 75kg soil nutrient dilatation of the present invention amendment (CK+T75) three process, each process repeats for three times, totally 9 communities, the group arrangement of random district, plot area 30m
2.
(1) Southern Red Soil nonirrigated farmland nutrient dilatation amendment is used on the impact of red soil micromorphology, unit weight and porosity
Electron-microscope scanning (SEM) method is adopted to observe undisturbed siol profile section after improved materials process, result as seen from Figure 2, the soil profile of control treatment (CK) is finer and close, haftplatte and hole less, the obvious passivation of soil soil block cloddy after peasant habit fertilising basis enriches the process of 50kg and 75kg soil nutrient of the present invention dilatation amendment, compactness reduce, hole increases, and it is larger to show consumption, the more obvious trend of effect.In addition, from table 1, compared with processing with contrast (CK), the soil weight that peasant habit fertilising basis enriches the process of 50kg and 75kg soil nutrient dilatation of the present invention amendment significantly reduces by 3.06% and 3.71% respectively, and voidage adds 3.98% and 5.88% respectively.As can be seen here, soil nutrient dilatation amendment of the present invention significantly can increase soil porosity, improvement Soil structure.
(2) impact of nutrient dilatation amendment in Southern Red Soil nonirrigated farmland on red soil pH value and soil nutrient is used
Using southern dry land nutrient dilatation amendment, having good effect to regulating the pH value of southern dry land acidic soil.As can be seen from Table 1, compared with contrast (CK), the red soil pH value that peasant habit fertilising basis is used soil nutrient dilatation amendment 50kg/ mu of the present invention and the process of 75kg/ mu rises 0.28 and 0.41 pH unit, soil exchangeable Al respectively
3+have dropped 24.32% and 35.61% respectively.Illustrate thus, soil nutrient dilatation amendment of the present invention can effective sweetening of the soil active acid, and the active aluminum in passivation soil, effectively solves " acid, poison " problem of southern dry land soil.
Compared with processing with contrast (CK), soil organic matter, full nitrogen, rapid available phosphorus and available potassium that peasant habit fertilising basis enriches the soil nutrient dilatation amendment of the present invention process of 50kg/ mu and 75kg/ mu all significantly increase, the process that wherein amount of enriching is large be significantly higher than the little process of the amount of enriching, as can be seen here, use soil nutrient dilatation amendment of the present invention and can significantly improve the amount retained of nutrient in soil such as the soil organism, full nitrogen, rapid available phosphorus and available potassium, effectively strengthen soil to the adsorptive power of nutrient.
(3) impact of nutrient dilatation amendment in Southern Red Soil nonirrigated farmland on red soil cation exchange capacity and characterization of adsorption is used
Cation Exchange Capacity in Soils (CEC) is the size of the adsorbable various cationic total amount of soil colloid, cation exchange capacity, can be used as the index evaluating soil fertilizer ability.From table 1, the CEC of CK+T50 and CK+T75 process comparatively CK process significantly improves 17.7% and 22.5% respectively, illustrate that on peasant habit fertilising basis, enrich soil nutrient dilatation amendment of the present invention can significantly improve Cation Exchange Capacity in Soils, expands the capacity of adsorption by soil nutrient thus.
Table 1 executes field soil nutrient content and pH value under composite soil modifier treatment condition
Note: mark lowercase alphabet in table and show LSD the result of multiple comparisons, same column same letter represents difference not significantly (P<0.05), below occurs that the form of letter has same meaning.
The analysis of npk nutrient characterization of adsorption is carried out to the topsoil soil sample do not executed amendment (contrast) and execute the process of 50kg and 75kg soil nutrient dilatation of the present invention amendment, result is from table 2, compared with contrast (CK), the soil that peasant habit fertilising basis enriches the process of 75kg/ mu soil nutrient dilatation amendment adds 66.7%, 33.4% and 614.5% respectively to the maximal absorptive capacity of nitrogen, phosphorus, potassium; Sorptive affinity constant improves 67.2%, 14.7% and 4% respectively.As can be seen here, use soil nutrient dilatation amendment of the present invention and effectively can improve soil to the maximal absorptive capacity of npk nutrient and sorptive affinity constant, wherein maximum with k adsorption element, secondly, phosphorus is relatively minimum for nitrogen.
Under composite soil modifier treatment condition executed by table 2, soil is to the characterization of adsorption of npk nutrient and absorption parameter
Note: R
2for relation conefficient, Xm is maximal absorptive capacity, and K is sorptive affinity constant, and MBC is maximum buffering capacity,
(4) impact of Southern Red Soil dryland soil nutrient dilatation amendment on peanut yield and yield forming index is used
Carry out field measurement in the harvesting peanut phase, gather peanut sample simultaneously and take back laboratory species test.Result is from table 3, with do not execute compared with amendment process (CK), the peanut yield that peasant habit fertilising basis enriches 50kg/ mu (CK+T50) and the process of 75kg/ mu (CK+T75) soil nutrient dilatation amendment increases by 8.4% and 10.9% respectively.From peanut yield component analysis, peasant habit fertilising basis enriches total fruit number of 50kg/ mu and the process of 75kg/ mu soil nutrient dilatation amendment, full fruit number and all kinds of fruits weight average increase to some extent, finally cause theoretical yield comparatively CK process raising 12.3% and 14.2% respectively.As can be seen here, peasant habit fertilising basis enriches soil nutrient dilatation amendment of the present invention and can significantly improve Upland Red Soil peanut yield.
Under composite soil modifier treatment condition executed by table 3, peanut yield is formed and output
Obviously, above-described embodiment is only for clearly example being described, and the restriction not to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And thus the apparent change of extending out or variation be still among the protection domain of the invention.
Claims (10)
1. a soil nutrient dilatation amendment, it is characterized in that, comprise following raw material by weight percentage: zeolite 25% ~ 35%, cinder 10% ~ 15%, carbonized rice husks 14% ~ 20%, flyash 12% ~ 17%, weathered coal 17% ~ 23%, polyacrylamide 3%-8%, binding agent 0-10%.
2. soil nutrient dilatation amendment according to claim 1, is characterized in that, the molecular weight of described polyacrylamide is 300-500 ten thousand.
3. soil nutrient dilatation amendment according to claim 2, is characterized in that, described polyacrylamide is anionic polyacrylamide.
4. the soil nutrient dilatation amendment according to any one of claim 1-3, is characterized in that, described amendment is particulate state.
5. the soil nutrient dilatation amendment according to any one of claim 1-3, it is characterized in that, described binding agent is attapulgite, wilkinite, slaked lime, sesbania powder, desulfurated plaster, any one of the plaster of paris or its arbitrary combination; Preferably, described binding agent is any one in attapulgite, wilkinite or its combination.
6. a preparation method for the soil nutrient dilatation amendment described in claim 1-5, it comprises the steps:
Step 1: prepare carbonized rice husks;
Step 2: carbonized rice husks is pulverized together with zeolite, cinder;
Step 3: add flyash, weathered coal in the material after pulverizing, fully mix, obtain mixture;
Step 4: carry out granulation to described mixture, adds appropriate binding agent, after master batch is shaping, adds polyacrylamide, obtain shaped granule in granulation process;
Step 5: dried by described shaped granule, sieves out the particle that particle diameter is 2mm ~ 5mm, namely obtains Southern Red Soil nonirrigated farmland nutrient dilatation amendment.
7. preparation method according to claim 6, is characterized in that, the carbonized rice husks in described step 1 is obtained by following methods: husk is carried out high temperature cabonization, and temperature controls at 500 ~ 600 DEG C, and carbonization time is 8 ~ 20h, and cooling, obtains carbonized rice husks.
8. preparation method according to claim 7, is characterized in that, described carbonization time is 12h.
9. preparation method according to claim 8, is characterized in that, described binding agent is attapulgite, wilkinite, slaked lime, sesbania powder, desulfurated plaster, any one of the plaster of paris or its arbitrary combination; Preferably, described binding agent is any one in attapulgite, wilkinite or its combination.
10. the preparation method according to any one of claim 6-9, is characterized in that, the feed postition of described polyacrylamide is: be sprayed onto after polyacrylamide is water-soluble in tablets press; Or, polyacrylamide is spread in tablets press in powder form.
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| CN109504394A (en) * | 2018-12-12 | 2019-03-22 | 山西农业大学 | Ecological organic type compound water retaining agent and preparation method thereof and retain water and nutrients soil |
| CN109880634A (en) * | 2019-04-11 | 2019-06-14 | 江西省农业科学院土壤肥料与资源环境研究所 | A kind of soil conditioner and its method for carrying out soil improvement |
| CN114685219A (en) * | 2022-04-29 | 2022-07-01 | 江西省农业科学院土壤肥料与资源环境研究所 | Rice field soil nutrient dilatation conditioner and preparation method and application method thereof |
| CN114685219B (en) * | 2022-04-29 | 2023-09-26 | 江西省农业科学院土壤肥料与资源环境研究所 | Paddy field soil nutrient capacity-expanding conditioner and preparation method and application method thereof |
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