CN109320375A - A kind of organic fertilizer and its preparation method and application for promoting root surface of rice iron film to generate - Google Patents
A kind of organic fertilizer and its preparation method and application for promoting root surface of rice iron film to generate Download PDFInfo
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- CN109320375A CN109320375A CN201811293974.8A CN201811293974A CN109320375A CN 109320375 A CN109320375 A CN 109320375A CN 201811293974 A CN201811293974 A CN 201811293974A CN 109320375 A CN109320375 A CN 109320375A
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- Prior art keywords
- rice
- organic fertilizer
- parts
- root surface
- iron film
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Classifications
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- 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
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/80—Soil conditioners
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G22/00—Cultivation of specific crops or plants not otherwise provided for
- A01G22/20—Cereals
- A01G22/22—Rice
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B13/00—Fertilisers produced by pyrogenic processes from phosphatic materials
- C05B13/02—Fertilisers produced by pyrogenic processes from phosphatic materials from rock phosphates
-
- 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
Abstract
A kind of organic fertilizer and its preparation method and application for promoting root surface of rice iron film to generate, the organic fertilizer for promoting root surface of rice iron film to generate by weight, including following components: decomposed horsehit 45-65 parts；8-12 parts of flyash；30-40 parts of calcium magnesium phosphate.The method of above-mentioned organic fertilizer is prepared the following steps are included: horsehit is put into fermentor by a., then plus water carries out spontaneous fermentation, obtains decomposed horsehit and air-dries；B. calcium magnesium phosphate is crushed, is then uniformly mixed with flyash, obtains inorganic nutrients；C. it takes the decomposed horsehit after air-drying and pulverizes, be then uniformly mixed with inorganic nutrients, water damping is added to obtain mixture；D. mixture is granulated, then through centrifugal drying, screening, finally obtains the heretofore described organic fertilizer for promoting root surface of rice iron film to generate.Above-mentioned organic fertilizer is remarkably improved root surface of rice iron film thickness, absorption of the rice to cadmium is obstructed, to reduce the cadmium content in rice.
Description
Technical field
The present invention relates to agricultural fertilizer technical field, in particular to a kind of organic fertilizer for promoting root surface of rice iron film to generate and
Preparation method and application.
Background technique
The quality of rice and soil are closely related, and the waste water generated, exhaust gas discharge, phosphate fertilizer containing cadmium are smelted in mining now
Etc. factors cause large area arable land cadmium pollution.Common rice is significantly stronger than other crops such as corn and soybean for the absorption of cadmium
Kind, hybrid rice are even more preferably at least twice common rice for the assimilation effect of cadmium.Long-term intake rice containing cadmium, is easy to make kidney
Dirty generation slow poisoning causes the symptoms such as albuminuria, acidaminuria and glycosuria, and then causes high risks to human health.It is existing
Reduce rice cadmium content mode be mostly by improve soil to the adsorptivity of cadmium come so that in soil free state cadmium from
Sub- content reduces, and the purpose for reducing rice cadmium content is realized with this.This drop cadmium mode has the disadvantage in that in practical application
1, soil can be changed by external environment influence, such as the soil moisture and humidity etc. to the adsorption capacity of cadmium and will lead to soil pair
The adsorption capacity of cadmium changes, and the timeliness and stability of absorption are to be improved.2, due to needing to add the heavy metals such as zinc, this has
Machine fertilizer can bring new heavy metal pollution after chronic administration.
The study found that the root system of rice in order to adapt to anaerobic environment, forms flourishing ventilation during long-term evolution
Oxygen in atmosphere, can expeditiously be transported root table by tissue.Fe is the main component of the earth's crust, in nature at the mistake of soil
Cheng Zhong, various oxides lodge in soil, and soil is under accumulated water state, due to the reduction of chemistry and biology, make
Obtain the Fe in soil2+Concentration sharply increases, Fe2+Red is evident that since continuous oxidation acts on root surface and is oxidized to
Iron film.In terms of root border cells mainly include following two to the main influence of rice: 1, when root surface of rice iron film is relatively thin, will promote
Absorption of the rice to cadmium, and the iron film of root surface of rice can obstruct rice to cadmium in paddy soil more than after certain thickness instead
It absorbs；2, itself is a the nutrition accumulation libraries for being gathered in root for root surface of rice iron film, while also having to rice absorbing phosphorus
Facilitation can effectively improve rice yield.
Summary of the invention
The purpose of the present invention is to provide a kind of organic fertilizers for promoting root surface of rice iron film to generate, by greatly improving
Root surface of rice iron film thickness, to obstruct absorption of the rice to heavy metal cadmium.
To solve the above-mentioned problems, using following technical scheme: a kind of organic fertilizer for promoting root surface of rice iron film to generate is pressed
Parts by weight meter, including following components:
Decomposed horsehit 45-65 parts；
8-12 parts of flyash；
30-40 parts of calcium magnesium phosphate.
Preferably, the organic fertilizer that above-mentioned promotion root surface of rice iron film generates includes following components:
55 parts of decomposed horsehit；
10 parts of flyash；
35 parts of calcium magnesium phosphate.
It is highly preferred that P in the calcium magnesium phosphate2O5Weight content be 15%-20%.
The method for preparing the organic fertilizer that above-mentioned promotion root surface of rice iron film generates, comprising the following steps:
A. horsehit is put into fermentor, then plus water carries out spontaneous fermentation, obtains decomposed horsehit and air-dries；
B. calcium magnesium phosphate is crushed, is then uniformly mixed with flyash, obtains inorganic nutrients；
C. it takes the decomposed horsehit after air-drying and pulverizes, be then uniformly mixed with inorganic nutrients, water damping is added to obtain mixture；
D. mixture is granulated, then through centrifugal drying, screening, finally obtains heretofore described promotion rice
The organic fertilizer that root border cells generate.
Compared to the prior art, the invention has the following advantages:
The present invention not only effectively increases the pH value of soil by addition calcium magnesium phosphate and flyash, improves acid soil,
Inhibit the activity of cadmium, and also improve the content of effective silicon and phosphorus in soil, silicon and phosphorus can generate antagonism to Rice Absorbed Cadmium
Effect, and inhibit the absorption to cadmium.Especially it is noted that the length of fiber is longer in decomposed horsehit, the left side 2cm can reach
The right side, decomposition rate in the soil is slower, can exist for a long time in the soil, and redox of soil electricity is reduced in decomposable process
Position, improves the content of effective iron content, so that root surface of rice iron film be promoted to be continuously generated, and then substantially increases root surface of rice
The accumulation thickness of iron film clearly to the assimilation effect of barrier heavy metal cadmium and is not readily susceptible to external environment influence, stablizes
Property it is preferable, will not also bring new heavy metal pollution, meanwhile, the raising of above-mentioned root border cells thickness is for promoting the growth of rice
Development and the raising of yield are also very favorable.
It generates and accumulates in conclusion organic fertilizer provided by the invention can effectively facilitate root surface of rice iron film, finally obtain
Root surface of rice iron film it is thicker, absorption of the rice to heavy metal cadmium in paddy soil can be effectively obstructed, to significantly reduce rice
In cadmium content.After tested, the application of the organic fertilizer can make cadmium content up to the rice of output in the heavy Cd contamination soil of 5mg/kg
Rice cadmium content is no more than 0.03mg/kg, far below threshold limit value 0.2mg/kg specified in national food safety standard, in addition,
The root border cells of formation can also effectively facilitate rice absorbing phosphorus, to effectively improve rice yield, be suitble in Rice Cropping
It is promoted and applied.
Specific embodiment
Embodiment is given below so that the present invention to be specifically described, it is necessary to which indicated herein is following embodiment
It is used to further illustrate the present invention, should not be understood as limiting the scope of the invention, the ordinary skill in the field
Personnel still fall within protection scope of the present invention to some nonessential improvement of the invention made or adjustment according to this embodiment.
Embodiment 1
A kind of method for preparing organic fertilizer that promotion root surface of rice iron film generates, comprising the following steps:
A. horsehit is put into fermentor, adds suitable quantity of water to carry out spontaneous fermentation, obtains decomposed horsehit and air-dry；
B. the calcium magnesium phosphate of 30 parts by weight is crushed, is then uniformly mixed with the flyash of 8 parts by weight, inorganic support is made
Point；
C. 45 parts by weight of decomposed horsehit after air-drying are taken and are pulverized, is then uniformly mixed with inorganic nutrients, water damping is added to obtain
To mixture；
D. mixture is granulated using granulating disc, then through centrifugal drying, screening, obtains organic fertilizer.
Wherein, P in calcium magnesium phosphate2O5Weight content be 15%.
Embodiment 2
A kind of method for preparing organic fertilizer that promotion root surface of rice iron film generates, comprising the following steps:
A. horsehit is put into fermentor, adds suitable quantity of water to carry out spontaneous fermentation, obtains decomposed horsehit and air-dry；
B. the calcium magnesium phosphate of 40 parts by weight is crushed, is then uniformly mixed with the flyash of 12 parts by weight, inorganic support is made
Point；
C. 65 parts by weight of decomposed horsehit after air-drying are taken and are pulverized, is then uniformly mixed with inorganic nutrients, water damping is added to obtain
To mixture；
D. mixture is granulated using granulating disc, then through centrifugal drying, screening, obtains organic fertilizer.
Wherein, P in calcium magnesium phosphate2O5Weight content be 20%.
Embodiment 3
A kind of method for preparing organic fertilizer that promotion root surface of rice iron film generates, comprising the following steps:
A. horsehit is put into fermentor, adds suitable quantity of water to carry out spontaneous fermentation, obtains decomposed horsehit and air-dry；
B. the calcium magnesium phosphate of 35 parts by weight is crushed, is then uniformly mixed with the flyash of 10 parts by weight, inorganic support is made
Point；
C. 55 parts by weight of decomposed horsehit after air-drying are taken and are pulverized, is then uniformly mixed with inorganic nutrients, water damping is added to obtain
To mixture；
D. mixture is granulated using granulating disc, then through centrifugal drying, screening, obtains organic fertilizer.
Wherein, P in calcium magnesium phosphate2O5Weight content be 18%.
Pot experiment
(1) manure use handles soil
Flowerpot specification: upper diameter × lower diameter × height=25cm × 18cm × 26cm amounts to 18 flowerpots, and every basin is packed into
5kg soil.
Test group: amount to 9 flowerpots, numbering in order is No. 1-9.Total cadmium content is in the soil of 1-3 flowerpot
1.0mg/kg applies preparation-obtained organic fertilizer in embodiment 1；Total cadmium content is 3.0mg/kg in the soil of 4-6 flowerpot,
Apply preparation-obtained organic fertilizer in embodiment 2；Total cadmium content is 5.0mg/kg in the soil of 7-9 flowerpot, and application is implemented
Preparation-obtained organic fertilizer in example 3.The dosage of the above organic fertilizer is the 1/19 of soil quality, i.e., what each flowerpot applied has
Machine fertilizer quality is 0.26kg.
Control group: amount to 9 flowerpots, numbering in order is No. 1-9, wherein total cadmium content is in the soil of 1-3 flowerpot
Total cadmium content is 3.0mg/kg in the soil of 1.0mg/kg, 4-6 flowerpot, and total cadmium content is in the soil of 7-9 flowerpot
5.0mg/kg, above 9 flowerpots do not apply organic fertilizer.
(2) rice cultivation
Rice paddy seed is sterilized 15 minutes with 5% liquor natrii hypochloritis, is then germinateed in moist sterilizing quartz sand,
After 3 weeks by the almost the same transplantation of seedlings of size into flowerpot, 3 plants of every basin.All flowerpots are randomly put in the greenhouse, and are flooded
Water process, water level about in the above 3cm of native table, apply the compound fertilizer of a N:P:K=15:15:15 every 3 weeks, and compound fertilizer passes through commercially available
It obtains, compound fertilizer's amount of application is 3.5g/ basin.
(3) cadmium content and root surface of rice iron film content in brown rice are detected after rice is mature
1. collecting paddy, is shelled after air-drying using hulling machine, obtain brown rice, drying to constant weight at a temperature of 70 DEG C by brown rice
Afterwards, sample is obtained after crushing, sample is placed in counteracting tank, and HNO is added3And H2O2, it is then placed in microwave dissolver and carries out
Resolution using the cadmium content in flame atomic absorption spectrophotometer (AA-6300C, Shimadzu) detection digestion solution, and will test result note
It records to the following table 1.
The brown rice cadmium content of 1 test group of table and control group output
2. rinsing the soil for removing the attachment of rice root surface with tap water, then rice root is carried out again using deionized water
Once flushing is blotted surface moisture with filter paper after flushing.Root after cleaning is placed in 50mL centrifuge tube, with even two sulfurous
Hydrochlorate-citrate-bicarbonate salt method root surface of rice iron film, leaching liquor volume used are 30mL, and by 0.03mol/L's
Na3C6H5O7·2H2The NaHCO of O and 0.125mol/L3Mixed liquor, 0.6g Na2S2O4Composition.Gained leaching liquor is placed in and is turned
Speed is 280rmin-1Shaking table on vibrate 1h after, pour into the volumetric flask of 50mL, then with deionized water rinse root 3 times, wash
Liquid is poured into together in above-mentioned volumetric flask, is settled to 50mL.Using flame atomic absorption spectrophotometer (AA-6300C, Shimadzu) to capacity
The iron content of extracting solution is tested in measuring bottle, and be will test result and recorded to shown in the following table 2.
The root border cells iron content of 2 test group of table and control group output rice
By table 1, table 2 it is found that test group is added to the organic fertilizer for promoting root surface of rice iron film to generate in the present invention, finally
Obtained root surface of rice iron film iron content is tested to dramatically increase, so that effectively obstructed rice root absorbs cadmium from soil,
Therefore the cadmium content of brown rice is extremely low in test group.It is found through overtesting, the application of the organic fertilizer can make cadmium content up to 5mg/kg's
The Cd concentration of brown rice of output is no more than 0.03mg/kg in heavy Cd contamination soil, far below providing in national food safety standard
Threshold limit value 0.2mg/kg.And control group, since the organic fertilizer not being added, the root border cells iron content tested is lower, rough
Rice cadmium content is several ten times of test group, and cadmium content severely exceeds.
Claims (5)
1. a kind of organic fertilizer for promoting root surface of rice iron film to generate, which is characterized in that by weight, including following components:
Decomposed horsehit 45-65 parts；
8-12 parts of flyash；
30-40 parts of calcium magnesium phosphate.
2. organic fertilizer according to claim 1, which is characterized in that including following components:
55 parts of decomposed horsehit；
10 parts of flyash；
35 parts of calcium magnesium phosphate.
3. organic fertilizer according to claim 1 or 2, which is characterized in that P in the calcium magnesium phosphate2O5Weight content be
15%-20%.
4. the method for preparing the described in any item organic fertilizers of claim 1-3, which comprises the following steps:
A. horsehit is put into fermentor, then plus water carries out spontaneous fermentation, obtains decomposed horsehit and air-dries；
B. calcium magnesium phosphate is crushed, is then uniformly mixed with flyash, obtains inorganic nutrients；
C. it takes the decomposed horsehit after air-drying and pulverizes, be then uniformly mixed with inorganic nutrients, water damping is added to obtain mixture；
D. mixture is granulated, then through centrifugal drying, screening, finally obtains heretofore described promotion root surface of rice
The organic fertilizer that iron film generates.
5. application of the described in any item organic fertilizers of claim 1-3 in Rice Cropping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811293974.8A CN109320375B (en) | 2018-11-01 | 2018-11-01 | Organic fertilizer for promoting generation of iron film on rice root surface and preparation method and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811293974.8A CN109320375B (en) | 2018-11-01 | 2018-11-01 | Organic fertilizer for promoting generation of iron film on rice root surface and preparation method and application thereof |
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| CN109320375A true CN109320375A (en) | 2019-02-12 |
| CN109320375B CN109320375B (en) | 2022-03-11 |
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