AU2021104055A4 - Organic Fertilizer for Improving Remediation Effect of Acidified Soil and Preparation Method Thereof - Google Patents
Organic Fertilizer for Improving Remediation Effect of Acidified Soil and Preparation Method Thereof Download PDFInfo
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- 239000002689 soil Substances 0.000 title claims abstract description 58
- 239000003895 organic fertilizer Substances 0.000 title claims abstract description 38
- 230000000694 effects Effects 0.000 title claims abstract description 30
- 238000005067 remediation Methods 0.000 title claims abstract description 18
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- QGBSISYHAICWAH-UHFFFAOYSA-N dicyandiamide Chemical compound NC(N)=NC#N QGBSISYHAICWAH-UHFFFAOYSA-N 0.000 claims abstract description 24
- 235000001674 Agaricus brunnescens Nutrition 0.000 claims abstract description 23
- 239000010871 livestock manure Substances 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 241000233866 Fungi Species 0.000 claims abstract description 15
- 238000002156 mixing Methods 0.000 claims abstract description 15
- 239000000203 mixture Substances 0.000 claims abstract description 14
- 239000004927 clay Substances 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 7
- 239000003112 inhibitor Substances 0.000 claims abstract description 6
- 239000002994 raw material Substances 0.000 claims abstract description 5
- 210000003608 fece Anatomy 0.000 claims description 5
- 238000005469 granulation Methods 0.000 claims description 4
- 230000003179 granulation Effects 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 239000002699 waste material Substances 0.000 claims description 4
- 238000000855 fermentation Methods 0.000 claims description 3
- 230000004151 fermentation Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 241000287828 Gallus gallus Species 0.000 claims description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 18
- 239000003337 fertilizer Substances 0.000 abstract description 18
- 239000002253 acid Substances 0.000 abstract description 11
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 9
- 239000005416 organic matter Substances 0.000 abstract description 5
- 230000008439 repair process Effects 0.000 abstract description 3
- 230000035558 fertility Effects 0.000 abstract description 2
- 238000006396 nitration reaction Methods 0.000 abstract 1
- 230000002786 root growth Effects 0.000 abstract 1
- 230000020477 pH reduction Effects 0.000 description 9
- 239000000047 product Substances 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- 241000209140 Triticum Species 0.000 description 7
- 235000021307 Triticum Nutrition 0.000 description 7
- 238000011282 treatment Methods 0.000 description 6
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 5
- 230000002378 acidificating effect Effects 0.000 description 5
- 238000001514 detection method Methods 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 5
- 239000011591 potassium Substances 0.000 description 5
- 229910052700 potassium Inorganic materials 0.000 description 5
- 241000209094 Oryza Species 0.000 description 4
- 235000007164 Oryza sativa Nutrition 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 4
- 230000004720 fertilization Effects 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 229910052698 phosphorus Inorganic materials 0.000 description 4
- 239000011574 phosphorus Substances 0.000 description 4
- 235000009566 rice Nutrition 0.000 description 4
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 3
- -1 ammonium ions Chemical class 0.000 description 3
- 239000004202 carbamide Substances 0.000 description 3
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 235000015097 nutrients Nutrition 0.000 description 2
- 239000010902 straw Substances 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 244000028550 Auricularia auricula Species 0.000 description 1
- 235000000023 Auricularia auricula Nutrition 0.000 description 1
- 241000271566 Aves Species 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 240000006499 Flammulina velutipes Species 0.000 description 1
- 235000016640 Flammulina velutipes Nutrition 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 240000000359 Triticum dicoccon Species 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000012272 crop production Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000005183 environmental health Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 244000144972 livestock Species 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001546 nitrifying effect Effects 0.000 description 1
- 239000000618 nitrogen fertilizer Substances 0.000 description 1
- 235000003715 nutritional status Nutrition 0.000 description 1
- 230000001151 other effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000004016 soil organic matter Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F3/00—Fertilisers from human or animal excrements, e.g. manure
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/10—Solid or semi-solid fertilisers, e.g. powders
- C05G5/12—Granules or flakes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/22—Improving land use; Improving water use or availability; Controlling erosion
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
- Y02P60/21—Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Fertilizers (AREA)
Abstract
The invention relates to an organic fertilizer for improving the remediation effect of acidified
soil. The fertilizer is prepared from the following raw materials in parts by weight: 5-10 parts
of biochar, 40-60 parts of mushroom residue of edible fungi, 10-20 parts of livestock manure,
5-10 parts of clay and 0.5-1 part of nitrification inhibitor dicyandiamide. The preparation
method is as follows. Evenly mix biochar, mushroom residue of edible fungi and livestock
manure according to the metering ratio. Adding water until the water content of the material
reaches 50-60%, continuously mixing evenly. Then fermenting with a film covering for 20-25
days to obtain a mixture. Adding clay and dicyandiamide into the mixture, mixing evenly,
crushing and granulating. According to the invention, mushroom residue is rich in organic
matter. Biochar is alkaline and rich in bases, so that acidity can be neutralized. Dicyandiamide
inhibits nitration of nitrogen in mushroom residue and livestock manure to control the
generation of acid. The fertilizer has a wide preparation source, low and controllable cost. It
can improve the soil fertility, repair acidity in acidified soil and promote crop root growth.
Description
Organic Fertilizer for Improving Remediation Effect of Acidified Soil and
Preparation Method Thereof
The invention belongs to the field of fertilizers, and particularly relates to an organic
fertilizer for improving soil acidification remediation effect and a preparation method
thereof.
At present, a large area of soil in the south of China shows an accelerated trend of
acidification. Excessive soil acidity will lead to lower crop yield and worse quality.
Meanwhile, harmful elements will be released into soluble state, which will affect
environmental health and sustainable development of society.
Although soil acidification is a natural process, it is often accelerated by human
influences. The acceleration of soil acidification is mainly due to human activities, and
the long-term excessive application of physiological acid fertilizer and ammonium
nitrogen fertilizer such as urea is an important reason for accelerating soil acidification
(John LH et al.,. 2006; Wang Jidong et al., 2016). Among them, urea, which is widely
used, is often hydrolyzed to produce ammonium ions. Every 1 mole of ammonium ions
will produce 2 moles of hydrogen ions during nitrification, which becomes an important
source of accelerated acidification of soil.
Using organic fertilizer to repair acidified soil has a good market prospect and application
value. When the organic fertilizer is applied to acidic soil reasonably, on the one hand, it
promotes crop production. At the same time, organic matter and alkaline substances in
organic fertilizer neutralize acid in acidic soil. Organic matter can also complex some heavy metals, reducing the dissolution of heavy metals in acidic soil. However, for a long time, the basic materials of organic fertilizer production come from various sources, including livestock manure and straw, etc. The remediation effect of different materials of organic fertilizer on acidic soil has not been reported. Biochar itself is alkaline, rich in calcium, magnesium, potassium and other base ions, and a large number of carboxyl and aromatic structures. At the same time, it has large specific surface area, strong adsorption capacity, water and fertilizer conservation, and carbon locks nitrogen and activates phosphorus and potassium. Therefore, biochar is regarded as an ideal choice for the improvement and restoration of acidified soil and the improvement of low-yield soil such as desertified soil and albic soil. Biochar is known as "black gold" in international academic circles. The application of biochar in acid soil has obvious effect on increasing yield and improving soil. However, the cost of biochar is high, and the price of organic fertilizer produced is difficult to be accepted by the market due to the high addition ratio.
However, the low addition ratio of biochar often has no obvious improvement effect on
acidic soil.
The object of the invention is to solve the defects of the prior art, and provide an organic
fertilizer for improving the soil acidification and remediation effect. Therefore the acidity
of acidified soil can be efficiently repaired while the soil fertility is improved, and the
organic fertilizer is low in cost, environment-friendly and efficient.
Another object of the present invention is to provide a preparation method of the organic
fertilizer.
Technical scheme
An organic fertilizer for improving the remediation effect of acidified soil is prepared
from the following raw materials in parts by weight: 5-10 parts of biochar, 40-60 parts of
mushroom residue of edible fungi, 10-20 parts of livestock manure, 5-10 parts of clay and
0.5-1 part of nitrification inhibitor dicyandiamide.
The biochar is formed by cracking and carbonizing crop straws or wood at low oxygen
and high temperature. It can be made by oneself or purchased in the market.
Furthermore, the mushroom residue of edible fungi is the leftover or waste of edible fungi
production, and the water content does not exceed 30%.
Furthermore, the water content of the livestock manure is not more than 40% The
livestock manure is selected from fresh pig manure, chicken manure or their mixture.
The preparation method of the organic fertilizer for improving the remediation effect of
acidified soil comprises the following steps.
(1) Evenly mixing biochar, mushroom residue of edible fungi and livestock manure
according to a metering ratio. Adding water until the water content of the material is 50
%, continuously mixing evenly. Then fermenting with a film covering for 20-25 days
to obtain a mixture.
(2) Adding clay and dicyandiamide into the mixture, mixing evenly, crushing,
granulating and bagging.
Furthermore, in the step (1), the film-covered fermentation temperature is 20-30°C.
Furthermore, in the step (2), the particle size of the granulation is 8-15mm.
The invention has the beneficial effects as follows.
1) The organic fertilizer contains biochar. Biochar can effectively supplement alkaline
substances in soil, improve soil organic matter, increase soil porosity and meet crop
growth. Moreover, biochar's addition ratio is not high, therefore the cost is controllable.
2) The nitrogen content and other nutrients in livestock manure and waste mushroom
residue are fully utilized. The waste is changed into valuable after secondary
fermentation, thus reducing the environmental pollution.
3) The nitrification inhibitor dicyandiamide is used to improve the fertilizer efficiency of
nitrogen contained in livestock manure and mushroom residue. At the same time, the
inhibition effect of nitrifying bacteria is used to reduce the acid generation of nitrogen
cycle after applying organic fertilizer. Therefore, the acidification repair effect of the
above organic fertilizer is further promoted, and the fertilizer efficiency improvement and
acidification inhibition effect kill two birds with one stone.
4) Through the compounding of biochar, mushroom residue, livestock manure and
dicyandiamide, the organic fertilizer produced has high organic matter content,
comprehensive nutrients and excellent product quality.
) The organic fertilizer has good cost control, takes cheap mushroom residue as the main
component. It has low proportion of biochar and dicyandiamide, especially low
application amount of dicyandiamide and good cost control.
6) According to different requirements, the products can be mixed evenly and applied in
powder form. The products can also be granulated into high-grade commercial organic
fertilizer, which can be applied by machines.
In order to better understand the above technical scheme, a detailed description of the
above technical scheme is given below with specific embodiments. In the following
embodiments, the biochar used was provided by Henan Shangqiu Sanli Co., Ltd.. The
mushroom residue of edible fungi was provided by the Spring and Autumn Fungi
Industry Professional Cooperative in tinghu district, Yancheng City. The livestock
manure was provided by large farmers in Binhai County, and the water content is about
38%. The agricultural dicyandiamide was produced by Zhengzhou Xinwei Chemical
Industry with a purity of 99%. The clay was collected from the fluvo-aquic soil in the old
channel of the Yellow River, and its pH is alkaline. But they are not limited to this.
Embodiment 1
An organic fertilizer for improving the remediation effect of acidified soil is prepared
from the following raw materials in parts by weight: 7 parts of biochar, 50 parts of
mushroom residue of edible fungi, 15 parts of livestock manure, 8 parts of clay and 0.7
part of nitrification inhibitor dicyandiamide. The mushroom residue is mushroom residue
of Auriculariaauricula with a water content of 37%.
The preparation method of the organic fertilizer for improving the remediation effect of
acidified soil comprises the following steps.
(1) Evenly mixing biochar, mushroom residue of edible fungi and livestock manure
according to the metering ratio. Adding water until the water content of the material
reaches 50%, continuously mixing evenly. Then fermenting with a film covering at 25C
for 22 days to obtain a mixture. Spreading the mixture to control the moisture.
(2) Adding clay and dicyandiamide into the mixture, mixing evenly, crushing and
granulating. The particle size of the granulation is 10mm.
Embodiment 2
An organic fertilizer for improving the remediation effect of acidified soil is prepared
from the following raw materials in parts by weight: 8 parts of biochar, 55 parts of
mushroom residue of edible fungi, 18 parts of livestock manure, 7 parts of clay and 0.9
part of nitrification inhibitor dicyandiamide. The mushroom residue is mushroom residue
of Flammulina velutipes with water content of 24%.
The preparation method of the organic fertilizer for improving the remediation effect of
acidified soil comprises the following steps:
(1) Evenly mixing biochar, mushroom residue of edible fungi and livestock manure
according to the metering ratio. Adding water until the water content of the material
reaches 60%, continuously mixing evenly. Then fermenting with a film covering at 24C
for 25 days to obtain a mixture.
(2) Adding clay and dicyandiamide into the mixture, mixing evenly, crushing and
granulating. The particle size of the granulation is 10mm.
1. Product detection test
The detection basis is NY/T525-2002 and GB18877-2002. The current organic fertilizer
standards in China and the organic fertilizer detection results of Embodiments 1-2 of the
present invention are shown in Table 1.
Table 1 Indicators Unit Standard Detection Detection results results of of Embodiment 2 Embodiment 1 N+P205 +K20 % >4 4.9 5.6 Organic matter % >30 44.2 46.8
Moisture (H20) % <20 16.9 18.1 Acidity and alkalinity (pH) 5.5-8 7.8 7.5 2. Application test
(1) Implementation time: 2015-2018, test site: Rice-wheat rotation base in Yunyang
Town, Danyang City, Jiangsu Province. The soil developed from silty Hunan sediments.
Before implementation, the soil nutrient status was: alkali-hydrolyzable nitrogen
90.2mg/kg, available phosphorus 13.3mg/kg, available potassium 88.0mg/kg, organic
matter content 13.8g/kg, pH 5.84(water-soil ratio 2.5:1).
Test scheme: field layout experiment, with a plot area of 30 square meters. The
experiment was divided into six groups with three repetitions in each group. Group (1):
blank control without any fertilizer. Group (2): the local conventional fertilization is to
apply the local common chemical fertilizer, and the pure dosage of nitrogen, phosphorus
and potassium was 20, 6 and 8kg/mu respectively. Group (3): 400g/mu of common
commercial organic fertilizer was applied on the basis of local conventional fertilization.
Commercial organic fertilizer was provided by Taizhou A Gurlis Company. Group (4):
400g/mu of common commercial organic fertilizer was applied on the basis of local
conventional fertilization. Commercial organic fertilizer was provided by Taizhou Green
Square Garden Co., Ltd. Group (5): the organic fertilizer in Embodiment 1 lacked
dicyandiamide. Group (6): the organic fertilizer in Embodiment 1 contained
dicyandiamide. Except for no fertilization, the management of topdressing in the later
stage of other treatments was consistent. When wheat was harvested, taking S-shaped
samples for each treatment and 5 points for each plot. After mixing, air-drying, grinding
and measuring pH. The results are shown in Table 2.
Table 2: Soil pH of different groups in the same sampling period under field experiment Treatment 2015 wheat 2016 wheat 2017 wheat 2018 rice season season season season Group (1) 5.78 5.86 5.80 6.05 Group (2) 5.64 5.53 5.49 5.87 Group (3) 5.89 5.97 6.08 6.13 Group (4) 5.83 5.88 5.96 6.08 Group (5) 6.10 6.18 6.21 6.22 Group (6) 6.18 6.32 6.41 6.45 It can be seen from Table 2 that on the basis of the same chemical fertilizer application, the application of organic fertilizer has a certain acid prevention effect. Compared with
Group (2), the soil pH of Group (3) and Group (4) with chemical fertilizer application is
obviously improved, indicating that the application of organic fertilizer has a certain acid
control effect, but the effect is limited. Group (5) is the product of the present invention
without dicyandiamide. Group (6) is the product of the present invention. It has a better
acid control effect than Group (3) and Group (4) applying common commercial organic
fertilizer. In both wheat season and rice season, the increase of soil pH is obvious.
Compared with the Group (5) without dicyandiamide, the acid control effect of
Embodiment 1 with dicyandiamide is more obvious. The highest pH increase in wheat
season was 0.2 unit, and that in rice was 0.23 unit. Compared with pure chemical
fertilizer wheat season, the highest pH increase was nearly 1 unit, and that of rice was
nearly 0.6 unit. This indicates that a small amount of dicyandiamide has a better effect on
acid control of organic fertilizer.
(2) Implementation scheme: red soil in Jiangxi, yellow brown soil in Anhui and paddy
soil in Danyang, Jiangsu were collected and potted indoors. Each pot was filled with 5kg
of soil, and there were 5 treatments, including Group (1) control treatment of pure
chemical fertilizer. Nitrogen, phosphorus and potassium were applied according to the
pure amount of 200, 80 and 120mg/kg of soil, and then mixed evenly. Group (2) applied
the product without dicyandiamide in Embodiment 1 based on the Group (1), and the application amount was 30g/ pot. Group (3) applied the product containing dicyandiamide in Embodiment 1 based on the Group (1). The pots were arranged in random blocks. The results are shown in Table 3.
Table 3 Changes of soil pH in different groups under soil culture Treatment Pre- pH of 10d pH of 30d pH of 60d pH of 80d experiment culture culture culture culture pH Red Group (1) 6.63 7.34 7.19 6.83 6.41 soil Group (2) 6.63 7.45 7.31 7.09 6.98 Group (3) 6.63 7.47 7.42 7.33 7.34 Yellow Group (1) 5.98 6.34 6.10 5.97 6.03 brown Group (2) 5.98 6.41 6.25 6.14 6.08 soil Group (3) 5.98 6.41 6.33 6.28 6.21 Paddy Group (1) 5.83 6.24 6.02 5.73 5.64 soil Group (2) 5.83 6.53 6.15 6.01 5.94 Group (3) 5.83 6.64 6.52 6.48 6.37 It can be seen from Table 3 that the urea added in the culture experiment hydrolyzed and
released a large amount of hydroxide, which led to a general increase in pH after 10 days
of culture, but a rapid decrease in pH after 30 days. Later, due to the nitrification of
nitrogen and other effects, a large acid was produced, the pH of Group (1) and Group (2)
dropped rapidly.
The above is only the preferred embodiment of the present invention, and it should be
pointed out that the scope of protection of the present invention is not limited to this. Any
person familiar with the technical field who makes equivalent substitution or change
according to the technical scheme and inventive concept of the present invention within
the technical scope disclosed by the present invention should be covered within the scope
of protection of the present invention.
Claims (6)
1. An organic fertilizer for improving the remediation effect of acidified soil,
characterized by being prepared from the following raw materials in parts by weight: 5
parts of biochar, 40-60 parts of mushroom residue of edible fungi, 10-20 parts of
livestock manure, 5-10 parts of clay and 0.5-1 part of nitrification inhibitor
dicyandiamide.
2. The organic fertilizer for improving the remediation effect of acidified soil according
to Claim 1, characterized in that the mushroom residue of edible fungi is leftover or waste
from the edible fungi production, and the water content does not exceed 30%.
3. The organic fertilizer for improving the remediation effect of acidified soil according
to Claim 1 or 2, characterized in that the water content of the livestock manure does not
exceed 40%, and is selected from fresh pig manure, chicken manure or their mixture.
4. The preparation method of organic fertilizer for improving the remediation effect of
acidified soil according to Claim 1, 2 or 3, characterized by comprising the following
steps:
(1) evenly mixing biochar, mushroom residue of edible fungi and livestock manure
according to a metering ratio, adding water until the water content of the material is 50
%, continuously mixing evenly, and then fermenting with a film covering for 20-25
days to obtain a mixture;
(2) adding clay and dicyandiamide into the mixture, mixing evenly, crushing, granulating
and bagging.
5. The preparation method of organic fertilizer for improving the remediation effect of
acidified soil according to Claim 4, characterized in that in the step (1), the film-covered
fermentation temperature is 20-30°C.
6. The preparation method of organic fertilizer for improving the remediation effect of
acidified soil according to Claim 4, characterized in that in the step (2), the particle size
of the granulation is 8-15 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2021104055A AU2021104055A4 (en) | 2021-07-12 | 2021-07-12 | Organic Fertilizer for Improving Remediation Effect of Acidified Soil and Preparation Method Thereof |
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| CN113999682A (en) * | 2021-11-05 | 2022-02-01 | 中国科学院大学 | Soil remediation agent with pH adjusting effect and preparation method thereof |
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