CN107459423A - One kind suppression cadmium plant nutrient agent and preparation method thereof and application process - Google Patents
One kind suppression cadmium plant nutrient agent and preparation method thereof and application process Download PDFInfo
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- CN107459423A CN107459423A CN201710662258.1A CN201710662258A CN107459423A CN 107459423 A CN107459423 A CN 107459423A CN 201710662258 A CN201710662258 A CN 201710662258A CN 107459423 A CN107459423 A CN 107459423A
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B1/00—Superphosphates, i.e. fertilisers produced by reacting rock or bone phosphates with sulfuric or phosphoric acid in such amounts and concentrations as to yield solid products directly
- C05B1/02—Superphosphates
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B79/00—Methods for working soil
- A01B79/02—Methods for working soil combined with other agricultural processing, e.g. fertilising, planting
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C21/00—Methods of fertilising, sowing or planting
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- 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
- A01G7/00—Botany in general
- A01G7/06—Treatment of growing trees or plants, e.g. for preventing decay of wood, for tingeing flowers or wood, for prolonging the life of plants
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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
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- Engineering & Computer Science (AREA)
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- Biodiversity & Conservation Biology (AREA)
- Forests & Forestry (AREA)
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Abstract
One kind suppression cadmium plant nutrient agent and preparation method thereof and application process, the nutritional agents include：Nitrogenous fertilizer, calcium superphosphate, potash fertilizer, plant nutrient agent, modified straw, bentonite and iron carbon.The preparation method will each raw material be well mixed, air-dry or drying, grind,.The application process is when turning over, and is applied with 200~340kg/ mus, then turn over；After waterflooding before rice transplanting, ensure that mass concentration is 0.5~1.0% in its water after；Booting latter stage and full heading time, the nutritional agents aqueous solution is subjected to foliage-spray, the dosage of nutritional agents is 40~70kg/ mus.Nutritional agents of the present invention makes cadmium content difference as little as 0.40mg/kg, 0.35mg/kg, 0.15mg/kg in stalk root, spike of rice, rice, and drop cadmium rate is up to 64.3%, 58.3% and 77.3% respectively；Preparation method of the present invention is simple, and cost is low；Application process of the present invention presses down cadmium efficiency high, and effect is good.
Description
Technical field
The present invention relates to a kind of plant nutrient agent and preparation method thereof and application process, and in particular to one kind suppression cadmium plant battalion
Support agent and preparation method thereof and application process.
Background technology
The national Soil Pollution Investigation publication of Chinese Ministry of Environmental Protection and Ministry of Land and Resources in April, 2014 issue is shown, with agriculture
Many heavy metal pollution such as field soil, air, irrigation water, trade waste, the arable land in the whole nation nearly 1/5th is by dirt
Dye.According to incompletely statistics, the whole nation is contaminated at present ploughs up to 10,000,000 hm2, total cultivated area more than 20% is accounted for, often
Year because economic loss caused by soil pollution up to 20,000,000,000 yuan, wherein every year because the grain of heavy metal pollution is up to 12,000,000 t.It is special
Be not more ground such as Hunan, Guangdong, Hubei, Zhejiang, Guizhou, Sichuan all there occurs the contaminated event of rice, and be reported out,
Cadmium rice just like turns into an important factor for being detrimental to health.As the pilot province of heavy metal pollution arable land repairing and treating, lake
South turns into the breach on China's regulation " poison ground ".
Cadmium is one of maximum heavy metal of toxicity, long-term a large amount of intakes, can cause the disease of kidney, liver, nerve etc..Once
It is by cadmium pollution water body and agricultural land soil through sensational Japanese Itai-itai diseases, enters through food chain caused by human body.Liu Zhi
Field experiment result that a man of virtue and ability etc. are carried out in heavy-metal contaminated soil around Dabaoshan Mining Area in Guangdong finds, rice Cd, Pb, Cu,
As exceeding standard rate respectively reaches 100%, 71.43%, 4.76%, 14.29%.It follows that cause major reason caused by cadmium rice
It is the soil by heavy metal pollution, because the harmfulness of heavy metal is big, hardly possible is repaired, characteristic easy to migrate, the harm president of soil
Phase is present, and the method on soil remediation mainly has physics, chemical method and biological control measure at present, but these methods are effective
Property, be difficult to produce a desired effect in terms of persistence and economy.In view of the economic benefit of grain, in, slight pollution area,
By some special methods and means, how to alleviate the concept that heavy metal migrates from soil to rice and be suggested, rice cadmium control
System turns into new research direction in the range of edible heavy metal concentration.
CN102180734A discloses a kind of Chemical Mixed Fertilizer and preparation method for reducing the exceeded rice field rice cadmium content of cadmium, surpasses cadmium
Mark rice field（Cd ＜ 0.6mg/kg）Soil activation state cadmium have dropped 31.9~58.5%, rice cadmium and reduce 28.7~51.7%（Its
Content ＜ 0.2mg/kg）.But suppression cadmium method of this method primarily directed to soil cadmium content when relatively low, and contain in Chemical Mixed Fertilizer
There are 13 kinds of materials, species is various, and the property change to soil has complexity.
CN106069429A discloses a kind of method for reducing semilate rice Cd concentration of brown rice, be passivated by plant extraction, soil,
Blade face resistance control, the collective effect of water management realize the double goal for reducing paddy soil cadmium and Cd concentration of brown rice.Although the party
Method mode is various, still, weakens the suppression cadmium effect of the preparation and method of application of soil heavy metal passivant to cadmium rice.
CN105594529A discloses a kind of method for reducing cadmium content in rice, and this method passes through biomass carbon and soil
Heavy metal deactivator, the collective effect of water-soluble foliage silicon fertilizer cause content of the cadmium in rice to reduce；Biomass carbon is used as can
The active principle of the cadmium content in rice is reduced, its raw material is easy to get, and cost is low；Using biomass carbon made from tabacco straw with flooding
Water management further reduces the cadmium content in rice.But the problem of cadmium content is exceeded be present in the tobacco planted in this method,
And soil heavy metal passivant amount of application is big, influenceed to caused by agricultural land soil property big.
CN106069427A discloses a kind of method for reducing Brown Rice cadmium content, using biomass carbon and calcium magnesium phosphate
When spreading fertilizer over the fields Soil tillage, amount of application is 600~1000 kg/hm2, it is limy in the limewash that boot stage and pustulation period apply
Measure as 150~325 kg/hm2.Because lime requirement is big, though lime has certain suppression cadmium effect to soil, change
The physicochemical property of soil, there is certain harm to plant, cure the symptoms, not the disease.
CN106631520A discloses a kind of rice selenium-rich drop cadmium foliar fertilizer, has good suppression cadmium performance, foliar fertilizer
Selenium-rich drop cadmium efficiency high, effect stability, the yield of rice are good.But foliar fertilizer can only locally suppress the migration of cadmium, the method pair
The effect of high concentration cadmium pollution soil has certain limitation, and effect is had a greatly reduced quality.
CN104402606A discloses a kind of rice suppression cadmium nutritional agents and its preparation, application method, the nutritional agents and laid particular emphasis on
The research of rice essential amino acid and selenium-rich, for the reduction amplitude of cadmium only 40% or so, drop cadmium effect is general in rice.
In summary, prior art is entered in the case where ensureing the nutritional condition of rice in the more serious agricultural land soil of cadmium pollution
Row suppression Cadmium treated, has that DeGrain, method of application are single, amount of application is big and passivator complicated component easily causes secondary dirt
The problems such as dye.
The content of the invention
The technical problems to be solved by the invention are to overcome drawbacks described above existing for prior art, there is provided one kind can suppress
Cadmium migrates from more serious soil is polluted to rice, reduces cadmium content in rice, passivator is simple and easy to get, and cost is low, secondary
Pollute few suppression cadmium plant nutrient agent.
Further technical problems to be solved of the invention are to overcome drawbacks described above existing for prior art, there is provided Yi Zhonggong
Skill is simple, and cost is low, suitable for the preparation method of the suppression cadmium plant nutrient agent of industrialized production.
Further technical problems to be solved of the invention are to overcome drawbacks described above existing for prior art, there is provided a kind of
Press down cadmium efficiency high, the application process for the suppression cadmium plant nutrient agent that suppression cadmium effect is good, and method of application is various, amount of application is few.
The technical solution adopted for the present invention to solve the technical problems is as follows：One kind suppression cadmium plant nutrient agent, including it is following
Component：Nitrogenous fertilizer, calcium superphosphate, potash fertilizer, plant nutrient agent, modified straw, bentonite and iron carbon.Present invention suppression cadmium plant nutrient agent
In, nitrogenous fertilizer, calcium superphosphate and potash fertilizer are as base manure, and modified straw, bentonite and iron carbon are as passivator.Present invention suppression cadmium plant
Passivator in nutritional agents can change the physicochemical property of the existing forms of cadmium or soil in soil, by making in agricultural land soil
With passivator, the water-soluble state of cadmium, tradable ionic state and oxidation state can be turned into stable state, reduce cadmium in soil
Migration and bioavailability.
Preferably, the parts by weight of suppression each raw material of cadmium plant nutrient agent are：5~15 parts of nitrogenous fertilizer, calcium superphosphate 7~20
Part, 6~20 parts of potash fertilizer, 5~12 parts of plant nutrient agent, 20~30 parts of modified straw, 2~6 parts of bentonite and 15~38 parts of iron carbon.
Above-mentioned each raw material is while plant nutrient is fed, and by taking rice as an example, can effectively reduce activated state cadmium from soil-stalk-rice
Content is shifted in rice, the activated state content of cadmium can reduce by 70~80% in soil, and the cadmium content in rice can reduce by 50~70%,
Largely reduce the cadmium content in rice.
It is highly preferred that the parts by weight of suppression each raw material of cadmium plant nutrient agent are：8~12 parts of nitrogenous fertilizer, calcium superphosphate 10
~16 parts, 9~15 parts of potash fertilizer, 7~10 parts of plant nutrient agent, 20~30 parts of modified straw, 2~6 parts of bentonite and iron carbon 17~
30 parts.
It is further preferred that the parts by weight of suppression each raw material of cadmium plant nutrient agent are：10 parts of nitrogenous fertilizer, calcium superphosphate
28 parts of 13 parts, 12 parts of potash fertilizer, 9.5 parts of plant nutrient agent, 23.5 parts of modified straw, 4 parts of bentonite and iron carbon.
Preferably, the nitrogenous fertilizer is the one or more in night soil, swine excrement, sulfate of ammoniac, nitric acid ammonia or urea etc..More
It is preferred that ammonium nitrate:Urea=1:4 mixing nitrogenous fertilizer or sulfate of ammoniac, nitric acid ammonia or urea=1:1:3 mixing nitrogenous fertilizer.
Preferably, the potash fertilizer is the one or more in potassium chloride, potassium sulfate, potassium carbonate or potassium nitrate etc..It is further preferred that
Potassium chloride:Potassium sulfate:Potassium carbonate=2:2:1 mixing potash fertilizer or potassium chloride:Potassium sulfate:Potassium nitrate=1:1:2 mixing potash fertilizer.
Preferably, the plant nutrient agent is the mixture of honey and molasses, wherein, the mass content of honey for 0.08~
2.0%（More preferably 0.5~1.5%）.The honey includes the honey of all kinds, such as rape flower honey, pagodatree flower honey, sweet osmanthus honeybee
Honey, chrysanthemum indicum honey or red jujube flower honey etc..Honey has anti-inflammation, promotes digestion to improve immunity, the work promoted longevity
With, and the content of selenium reaches 0.217mg/kg in molasses, belongs to natural organic selenium.The plant nutrient agent there is volume increase to increase crops
The effect of receipts, and selenium has certain inhibitory action to cadmium.
Preferably, the preparation method of the modified straw is：After stalk is dried, shred, sieve, charing, obtain charing straw
Stalk；Add edta solution in stalk is carbonized again, after whip modified, wash to neutrality, dry,.It is modified
Stalk there is the characteristics of hole is more, and specific surface area is big, and adsorption capacity is strong.
Preferably, in the preparation method of the modified straw, the mesh number of the sieving is 10~50 mesh.The stalk of the particle diameter
By the modified advantages of good adsorption effect to cadmium.
Preferably, in the preparation method of the modified straw, the temperature of the charing is 500~600 DEG C, the time of charing
For 20~40min.Under the temperature and time, the charred effect of stalk is best.
Preferably, in the preparation method of the modified straw, the quality of the charing stalk and edta solution
Volume ratio（g/mL）For 1:40~60, the mass concentration of the edta solution is 0.5~1.5%.In the modifying agent
Dosage under, absorption of the modified stalk to cadmium is more sensitive, if dosage is very few, absorb cadmium effect it is poor.
Preferably, in the preparation method of the modified straw, the temperature of the whip modified is 20~40 DEG C, whip modified
Rotating speed be 100~200r/min, the time of whip modified is 10~15h.Under the described conditions, stalk can fully and modifying agent
React, and be attached on stalk.
Preferably, in the preparation method of the modified straw, the temperature of the drying is 50~80 DEG C, and the dry time is
20~30h.
Preferably, the iron carbon is that the mass ratio of iron powder and activated carbon is 1:0.5~4.0（More preferably 1:1~3）Mixing
Thing.Absorption of the iron carbon dust for heavy metal cadmium under the ratio has efficient ability.
Technical scheme is as follows used by the present invention further solves its technical problem：A kind of system for pressing down cadmium plant nutrient agent
Preparation Method, nitrogenous fertilizer, calcium superphosphate, potash fertilizer, plant nutrient agent, modified straw, bentonite and iron carbon are well mixed, are placed in cool place
Place air-dries or 30~50 DEG C of drying in baking oven, grinds,.
Technical scheme is as follows used by the present invention further solves its technical problem：A kind of suppression cadmium plant nutrient agent
Application process, in rice terrace, suppression cadmium plant nutrient agent is applied in the following order：Before cultivation, during the 1st Soil tillage, with 200
~340kg/ mus are in the ranks applied in soil, then turning over 1~2 time makes soil be well mixed with suppression cadmium plant nutrient agent；Waterlogging
Afterwards, before rice transplanting, suppression cadmium plant nutrient agent is applied according to waterflooding amount, the mass concentration for ensureing to press down cadmium plant nutrient agent in water is 0.5
~1.0%；Booting latter stage and full heading time, the aqueous solution that suppression cadmium plant nutrient agent is configured to mass concentration 2~8% carry out blade face spray
Apply, uniformly spray on the surface of leaf, untill the dropping liquid of blade face, the dosage of suppression cadmium plant nutrient agent is 40~70kg/ mus.This hair
Bright to be applied using multi-level, it, which reduces the effect of cadmium content in rice, will be substantially better than single application.Applied in Soil tillage,
Present invention suppression cadmium plant nutrient agent can be done directly on the inside of arable layer, profound suppression cadmium effect can be achieved, and dosage is larger；
And applied before rice transplanting, now present invention suppression cadmium plant nutrient agent can be done directly on farming layer surface, can be fast though dosage is small
Speed is absorbed by rice；And the mode of foliage dressing can make rice leaf quickly absorb present invention suppression cadmium plant nutrient agent, carry
Its high utilization rate, while can also make the space on blade face occupied by the suppression cadmium composition and nutrient in suppression cadmium plant nutrient agent,
So as to reduce the content that available Cd migrates from soil to plant.To sum up, by the administration of these three different levels, can both subtract
The dosage of few passivator, the migration rate of heavy metal cadmium can be suppressed again.
Beneficial effects of the present invention are as follows：
（1）Present invention suppression cadmium plant nutrient agent can suppress in soil on the premise of essential amino acid is contained in ensureing rice
Cadmium migrates into rice, and the cadmium content in stalk root, spike of rice, rice can as little as 0.40mg/kg, 0.35mg/kg, 0.15mg/
Kg, drop cadmium rate may be up to 64.3%, 58.3%, 77.3% respectively, suppress cadmium and migrated from more serious soil is polluted to rice, greatly
The big content for reducing cadmium in rice, meets rice cadmium content requirement in China's food security standard, so as to alleviate cadmium in rice
The problem of seriously polluted, and cost is low, secondary pollution is few, and powerful guarantee is provided for agricultural product and food security；
（2）Preparation method technique of the present invention is simple, and cost is low, suitable for industrialized production；
（3）Application process of the present invention presses down cadmium efficiency high, and suppression cadmium effect is good, and method of application is various, amount of application is few.
Embodiment
With reference to embodiment, the invention will be further described.
Raw material used in the embodiment of the present invention or chemical reagent, unless otherwise specified, obtained by routine business approach
.
Reference example 1
The preparation method of modified straw：After stalk is dried, chopping, 20 mesh sieves are crossed, are placed in Muffle furnace, at 550 DEG C, charing
30min, obtain charing stalk；The edta solution of 50mL mass concentrations 1% is added in 1g carbonizes stalk again, at 30 DEG C,
Under rotating speed 150r/min, after whip modified 12h, with milli-Q water to neutrality, at 60 DEG C, 24h is dried,.
One kind suppression cadmium plant nutrient agent embodiment 1~8
The parts by weight of each raw material are as shown in table 1：
The embodiment of the present invention 1~8 of table 1 presses down the parts by weight table of cadmium plant nutrient agent
Note："-" represents to be not added with table.
A kind of preparation method embodiment 1~8 for pressing down cadmium plant nutrient agent
According to each parts by weight of raw materials described in table 1, by nitrogenous fertilizer, calcium superphosphate, potash fertilizer, plant nutrient agent, the modified straw of reference example 1,
Bentonite and iron carbon are well mixed, and 40 DEG C of drying, grind in baking oven,.
Using suppression cadmium performance test：
Experimental plot is arranged at the contaminated rice terrace of Wangcheng area block, is found by the investigation of early stage and monitoring, the rice terrace by
Cadmium pollution is serious, and the mean concentration of available Cd is 1.44mg/kg in rice terrace, is soil intermediate pollution area.
Experimental design：Experiment uses RANDOMIZED BLOCK DESIGN, and the processing of She11Ge areas, per area, processing is repeated 3 times, plot area
（Often repeat）The wide * 13m length=21.71m of 1.67m2, it is roughly equal to 0.033 mu, with thick plastic film ridge wide 0.3m（It is buried
0.3m）Separate；The nutritional agents of 1~10 trial zone is provided by present invention suppression cadmium plant nutrient agent embodiment 1~8, wherein, 1~8 examination
It is embodiment to test area, and 9,10 trial zones are comparative example；11 trial zones are blank control, are provided by the conventional composite fertilizer in market；For
Try rice varieties：Hunan morning Xian 45.
A kind of application process embodiment 1~8 for pressing down cadmium plant nutrient agent
1~8 trial zone suppression cadmium plant nutrient agent application process be：It is in the following order respectively in the trial zone of rice terrace 1~8
Using suppression cadmium plant nutrient agent embodiment 1~8：Before cultivation, during the 1st Soil tillage, with 200~340kg/ mus in soil in the ranks
Using, then turning over 2 times makes soil be well mixed with suppression cadmium plant nutrient agent；After waterlogging, before rice transplanting, applied according to waterflooding amount
Press down cadmium plant nutrient agent, the mass concentration for ensureing to press down cadmium plant nutrient agent in water is 0.5~1.0%；Booting latter stage and full heading time,
The aqueous solution that suppression cadmium plant nutrient agent is configured to mass concentration 2~8% carries out foliage-spray, uniformly sprays on the surface of leaf,
Untill the dropping liquid of blade face, the dosage of suppression cadmium plant nutrient agent is 40~70kg/ mus.
Specifically, nutritional agents dosage, the application process that 1~8 trial zone is applied are as shown in table 2：
Nutritional agents dosage, concentration and the application process table that the trial zone of table 2 1~8 is applied
Comparative example 1
9 trial zones press down cadmium plant nutrient agent with embodiment 7.
9 trial zones press down the application process of cadmium plant nutrient agent and differing only in for embodiment 7：Before cultivation, Soil tillage
When, do not apply suppression cadmium plant nutrient agent.Remaining same embodiment 7.
Comparative example 2
10 trial zones press down cadmium plant nutrient agent with embodiment 8.
10 trial zones press down the application process of cadmium plant nutrient agent and differing only in for embodiment 8：Booting latter stage and Qi Sui
Phase, press down cadmium plant nutrient agent without foliage-spray.Remaining same embodiment 8.
Each position cadmium content is as shown in table 3 in the cadmium content of 1~11 trial zone and the rice of plantation：
Each position cadmium content table in the cadmium content of the trial zone of table 3 1~11 and the rice of plantation
As shown in Table 3, for the trial zone of blank control 11, embodiment 1~8 application of suppression cadmium plant nutrient in farmland
After agent, the content of soil activation state cadmium is decreased obviously, and migration content of the cadmium at each position of rice also declines therewith, particularly,
Cadmium content has a different degrees of reduction in stalk root, spike of rice and rice, drop cadmium rate may be up to 64.3% respectively, 58.3%,
77.3%；Wherein, the drop cadmium rate highest of embodiment 1, embodiment 7 and embodiment 8, particularly, its Cd concentration of brown rice is respectively
0.15mg/kg, 0.17mg/kg, 0.17mg/kg, the cadmium content meet the national standard of cadmium content≤0.2mg/kg in rice.By
Comparative example 1,2 is understood, after method of application is changed, suppresses effect reduction of the cadmium in each position migration of rice, particularly rice
Drop cadmium rate is greatly reduced, and even as low as 22.7%.
Claims (9)
1. one kind suppression cadmium plant nutrient agent, it is characterised in that including following components：Nitrogenous fertilizer, calcium superphosphate, potash fertilizer, plant nutrient
Agent, modified straw, bentonite and iron carbon.
2. press down cadmium plant nutrient agent according to claim 1, it is characterised in that the parts by weight of each raw material are：Nitrogenous fertilizer 5
~15 parts, 7~20 parts of calcium superphosphate, 6~20 parts of potash fertilizer, 5~12 parts of plant nutrient agent, 20~30 parts of modified straw, bentonite 2
~6 parts and 15~38 parts of iron carbon.
3. press down cadmium plant nutrient agent according to claim 1, it is characterised in that the parts by weight of each raw material are：Nitrogenous fertilizer 8
~12 parts, 10~16 parts of calcium superphosphate, 9~15 parts of potash fertilizer, 7~10 parts of plant nutrient agent, 20~30 parts of modified straw, bentonite
2~6 parts and 17~30 parts of iron carbon.
4. according to one of claims 1 to 3 suppression cadmium plant nutrient agent, it is characterised in that：The nitrogenous fertilizer is night soil, pig manure
Just, the one or more in sulfate of ammoniac, nitric acid ammonia or urea；The potash fertilizer is in potassium chloride, potassium sulfate, potassium carbonate or potassium nitrate
One or more；The plant nutrient agent is the mixture of honey and molasses, wherein, the mass content of honey for 0.08~
2.0%。
5. according to one of Claims 1 to 4 suppression cadmium plant nutrient agent, it is characterised in that the preparation side of the modified straw
Method is：After stalk is dried, shred, sieve, charing, obtain charing stalk；It is molten that ethylenediamine tetra-acetic acid is added in stalk is carbonized again
Liquid, after whip modified, wash to neutrality, dry,.
6. press down cadmium plant nutrient agent according to claim 5, it is characterised in that：The mesh number of the sieving is 10~50 mesh；Institute
The temperature for stating charing is 500~600 DEG C, and the time of charing is 20~40min；The charing stalk and edta solution
Mass volume ratio be 1:40~60, the mass concentration of the edta solution is 0.5~1.5%；The whip modified
Temperature be 20~40 DEG C, the rotating speed of whip modified is 100~200r/min, and the time of whip modified is 10~15h；It is described dry
Dry temperature is 50~80 DEG C, and the dry time is 20~30h.
7. according to one of claim 1~6 suppression cadmium plant nutrient agent, it is characterised in that：The iron carbon is iron powder and activity
The mass ratio of charcoal is 1:0.5~4.0 mixture.
A kind of 8. preparation method for pressing down cadmium plant nutrient agent as described in one of claim 1~7, it is characterised in that：By nitrogenous fertilizer, mistake
Calcium phosphate, potash fertilizer, plant nutrient agent, modified straw, bentonite and iron carbon are well mixed, In Shade to air-dry or in baking oven
In 30~50 DEG C drying, grind,.
9. a kind of application process for pressing down cadmium plant nutrient agent as described in one of claim 1~7, it is characterised in that in rice terrace
In, suppression cadmium plant nutrient agent is applied in the following order：Before cultivation, during the 1st Soil tillage, with 200~340kg/ mus in soil
In the ranks apply, then turning over 1~2 time makes soil be well mixed with suppression cadmium plant nutrient agent；After waterlogging, before rice transplanting, according to flooding
Water applies suppression cadmium plant nutrient agent, and the mass concentration for ensureing to press down cadmium plant nutrient agent in water is 0.5~1.0%；Booting latter stage and
Full heading time, the aqueous solution that suppression cadmium plant nutrient agent is configured to mass concentration 2~8% carry out foliage-spray, uniformly sprayed in leaf
Surface, untill the dropping liquid of blade face, suppression cadmium plant nutrient agent dosage be 40~70kg/ mus.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107935640A (en) * | 2017-12-29 | 2018-04-20 | 青岛农业大学 | It is a kind of to accelerate decomposed additive of pig manure and its preparation method and application |
| CN110367063A (en) * | 2019-07-29 | 2019-10-25 | 贵州理工学院 | A kind of preparation method of quinoa bitter buckwheat compound nutritional meal |
| CN113528143A (en) * | 2021-07-08 | 2021-10-22 | 华中农业大学 | Rice hull ash powder composite material, and granulation method and application thereof |
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| CN107935640A (en) * | 2017-12-29 | 2018-04-20 | 青岛农业大学 | It is a kind of to accelerate decomposed additive of pig manure and its preparation method and application |
| CN107935640B (en) * | 2017-12-29 | 2021-03-02 | 青岛农业大学 | Additive for accelerating compost maturity of pig manure and preparation method and application thereof |
| CN110367063A (en) * | 2019-07-29 | 2019-10-25 | 贵州理工学院 | A kind of preparation method of quinoa bitter buckwheat compound nutritional meal |
| CN113528143A (en) * | 2021-07-08 | 2021-10-22 | 华中农业大学 | Rice hull ash powder composite material, and granulation method and application thereof |
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