CN106358553A - Method for applying phosphate fertilizer to reduce content of mercury in rice grains of heavy mercury polluted rice field - Google Patents
Method for applying phosphate fertilizer to reduce content of mercury in rice grains of heavy mercury polluted rice field Download PDFInfo
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- CN106358553A CN106358553A CN201610812227.5A CN201610812227A CN106358553A CN 106358553 A CN106358553 A CN 106358553A CN 201610812227 A CN201610812227 A CN 201610812227A CN 106358553 A CN106358553 A CN 106358553A
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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
- A01C21/005—Following a specific plan, e.g. pattern
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Abstract
The invention relates to a method for applying a phosphate fertilizer to reduce the content of mercury in rice grains of a heavy mercury polluted rice field, belonging to the technical field of agricultural product heavy metal pollution prevention and treatment. The method is characterized by comprising the following steps: in the heavy mercury polluted rice field (the soil Hg concentration is 2mg/kg, which is 4 times the national limit standard), applying 100kg/hm<2> (at a middle phosphorus application level by an effective component P2O5) of the phosphate fertilizer for three times, namely, applying 1/2 of the total phosphatic fertilizer 3 days before rice transplanting, and applying 1/4 of the total phosphatic fertilizer 5 days before earing and 10 days after head sprouting respectively; throwing the phosphate fertilizer 3 days before rice transplanting, namely, uniformly throwing the phosphate fertilizer into the rice field; applying the phosphate fertilizer in a leaf surface spraying mode 5 days before earing and 10 days after head sprouting, dissolving a water-soluble phosphate fertilizer into water, and spraying 300L of water with the phosphate fertilizer to each hectare of the rice field. Compared with a common high-level one-time phosphate fertilizer application method used in practical rice production, the method has an application effect that the content of mercury in the rice grains can be greatly reduced (the content of the mercury in indica type rice is reduced by 61.54%, and the content of mercury in japonica rice is reduced by 56.67%), and the yield of rice is not greatly reduced.
Description
Technical field
The present invention is a kind of phosphate fertilizer method reducing rice grain mercury content in severe mercury pollution rice field, belongs to agricultural production
Product Heavy Metal Pollution technology.
Background technology
In Chinese industrial occupancy and developed area, with the increase of population, industrial expansion and agricultural chemicals
A large amount of uses, the heavy metal pollution of agricultural land soil is increasingly serious.According to investigations, the whole nation by heavy metal pollution farm land area about
There are 25,000,000 hectares, up to 12,000,000 tons of grain contaminated by heavy metals every year.Ministry of Agriculture's environment monitoring system to national 24 provinces,
82,230,000 mu of severe contamination area of 320, city land investigation finds, agricultural products farmland pollution exceeded area in land for growing field crops accounts for polluting agriculture
The 20% of field area, wherein 80% soil and crop pollution are exceeded to be due to heavy metal pollution.
China is one of with serious pollution country of hydrargyrum (hg) in the world, especially industry prosperity, densely populated city and
Surrounding area.According to statistics, China every year produce pollution environment hg reach 1.9 × 108Kg, the cultivated area being polluted by hg has 3.2
×104hm2, problem is extremely serious.It was found that in some areas of southern Jiangsu, soil hg damage ratio is more serious, topsoil hg content
Reach more than 10 times of background value, and vertical section distribution is substantially, illustrates that the input of pollutant in process of industrialization is soil
The leading factor of hg accumulation.Dirty to the whole province's Heavy Metal in Vegetable Farm Soil according to agricultural product quality supervision and inspection center of Jiangsu Province
Dye situation is sampled detecting, southern area of Jiangsu Province vegetable field heavy metal pollution situation is more serious.According to China's non-polluted farm product and
Pollution-free food certification work emphasis monitoring 5 heavy metal species, have 54.8% vegetable field comprehensive pollution indexes be more than 1, and hg and
The share rate of cadmium is higher.In 6 non-polluted farm products that Jiangsu Province in 2006 is cancelled, 4 are had to be because that soil hg content surpasses
Caused by mark.
Hydrargyrum is the environmental contaminants that on the earth, effect on environment is big, have serious toxicity to biology.What is more important, hg and
Its compound either aerobic still under anaerobic, can effect through microorganism, be transformed into the higher first of toxicity
Base hydrargyrum or dimethylmercury.The organic compound of hg has serious neurotoxicity, will produce after amplifying through biological concentration and food chain
The more serious consequence of life.Since " minamata disease " event of Japan in 1956, the natural environment being polluted by hg is sent out to the mankind
The warning going out is continuously increased, and hg is in soil -- and the transmission speed in botanical system and terrestrial food chain is constantly accelerated, and hg pollution is asked
Topic causes extensive concern and the attention of people.Hg by United Nations Environment Programme (unep), World Health Organization (WHO) (who),
International food and agricultural organization (fao) and much national government are classified as the environmental contaminants of priority acccess control.Therefore, hg Soil-crops-
Movement in human system and accumulation are paid high attention to.
In Soil Mercury Pollution area, the mercury content in rice grain not only can be subject to Soil Mercury Pollution situation and rice varieties
Impact, also suffer from the impact of cultivation technique.During paddy growth, the agronomic measures such as fertilising, water management can change
The physics and chemistry situation of soil and the upgrowth situation of Oryza sativa L., thus existence and the effectiveness to plant of mercury in soils can be changed,
Impact Oryza sativa L. is to the absorption of hydrargyrum and distribution.Different rice field phosphorus application amounts and application process to absorption in rice plant for the hydrargyrum and are moved
Move and have different impacts.But in terms of the impact to rice grain mercury content of the fertilizing standards with regard to phosphate fertilizer and Dressing date, also
Lack very much research.
The present invention, on the basis of applicant studies for many years, discloses rice grain in a kind of reduction severe mercury pollution rice field
The phosphate fertilizer method of mercury content, can be greatly lowered the mercury content of rice grain, and rice yield is not decreased obviously.
Content of the invention
The technical problem to be solved is: provides rice grain mercury content in a kind of reduction severe mercury pollution rice field
Phosphate fertilizer method, the mercury content of in severe mercury pollution rice field rice grain can be greatly lowered, and rice yield not have
It is decreased obviously.
The technical solution adopted for the present invention to solve the technical problems is: Oryza sativa L. seed in a kind of reduction severe mercury pollution rice field
The phosphate fertilizer method of grain mercury content, is characterized in that: in severe mercury pollution rice field, (soil hg concentration is 2mg/kg, reaches state
4 times of family's limit standard), total phosphorus application amount is 100kg/hm2(middle Supplied P level, with effective ingredient p2o5Meter), apply in three times,
Transplant seedlings the 1/2 of the total phosphorus application amount of its 3 days Shi respectively in Oryza sativa L., first 5 days of heading, the total phosphorus application amount of each Shi of latter 10 days of heading 1/4.
Transplant seedlings first 3 days apply phosphorus using spreading fertilizer over the fields, phosphate fertilizer is uniformly spread fertilizer over the fields in rice field.Ear first 5 days and ear latter 10 days
Apply phosphorus adopt foliage-spray method, with water soluble phosphorous fertilizer spraying soluble in water, per hectare water consumption 300l.
The invention has the beneficial effects as follows: after severe mercury pollution area in rice field is implemented, rice grain can be greatly lowered
Mercury content, rice yield is not decreased obviously.With the conventional disposable phosphate fertilizer method of high level in Oryza sativa L. actual production
Compare, the mercury content fall of rice grain is big (long-grained nonglutinous rice declines 61.54%, and japonica rice declines 56.67%), and rice yield does not have
It is decreased obviously (long-grained nonglutinous rice only declines 1.79%, and japonica rice only declines 1.59%).In rice field severe mercury pollution area (soil hg concentration
For 2mg/kg, reach 4 times of national limit standard), by the enforcement of this application art solutions, rice grain can be made
Mercury content significantly declines, and can control the mercury content of rice grain in state health standards limit value (0.02mg/kg, gb2762-
2012) threat to health for the Oryza sativa L. mercury pollution can below, be eliminated.
Specific embodiment
Embodiment 1: a kind of phosphate fertilizer method reducing rice grain mercury content in severe mercury pollution rice field, in whole water
In the rice production cycle, total phosphorus application amount is 100kg/hm2(middle Supplied P level, with effective ingredient p2o5Meter), apply in three times, respectively
The 1/2 of the total phosphorus application amount of 3 days Shi before Oryza sativa L. is transplanted seedlings, first 5 days of heading, the total phosphorus application amount of each Shi of latter 10 days of heading 1/4.Due to not
P with phosphate fertilizer variety2o5Content is variant, will be calculated according to the active constituent content of concrete phosphate fertilizer variety and specifically apply during fertilising
Fertilizer amount.
Transplant seedlings first 3 days apply phosphorus using spreading fertilizer over the fields, phosphate fertilizer is uniformly spread fertilizer over the fields in rice field.Ear first 5 days and ear latter 10 days
Apply phosphorus adopt foliage-spray method, with water soluble phosphorous fertilizer spraying soluble in water, per hectare water consumption 300l.
Prove that the present embodiment can be greatly lowered severe mercury pollution rice field Zhong Shui further below by the mode of list
The mercury content of rice seed, and rice yield is not decreased obviously.In table, data is to be 2mg/kg, reach country in soil hg content
Obtain under the conditions of 4 times (serious pollution degree) of limit standard, other control measures are carried out by Rice Production routine.
The rice grain mercury content that table 1 rice field difference is applied under phosphorus method compares (unit: mg/kg)
Note: phosphorus period code is applied in rice field
A: as base manure one-time use.
B: points 2 times administrations, respectively before Oryza sativa L. is transplanted seedlings 3 days and after transplanting seedlings the total phosphorus application amount of 30 days each Shi 1/2.
C: points 3 times fertilisings, respectively before transplanting seedlings in Oryza sativa L. the total phosphorus application amount of 3 days Shi 1/2,10 after first 5 days of heading, heading
The 1/4 of the total phosphorus application amount of its each Shi.
The rice yield that table 2 rice field difference is applied under phosphorus method compares (unit: kg/hm2)
From Supplied P level with terms of applying phosphorus period two, Tables 1 and 2 is analyzed visible:
(1) analyze from Supplied P level
Under different Supplied P level, the order of rice grain mercury content is: low Supplied P level > high Supplied P level > in apply
Phosphorus level.Under different Supplied P level, rice yield order is: high Supplied P level > in Supplied P level > low Supplied P level, but in
Rice yield under Supplied P level than high Supplied P level fall very little, below 3.5%.
(2) from applying phosphorus period analysises
Different interim when applying phosphorus, the order of rice grain mercury content is: disposably applies phosphorus > apply phosphorus in two times > points three
Secondary apply phosphorus.And, apply the rice yield also highest of phosphorus in three times.
Comprehensive Supplied P level and apply the impact to rice grain mercury content and rice yield for the phosphorus period, applies phosphorus water in selection
The mercury content applied phosphorus method, rice grain can be greatly lowered that is flat, applying in three times, the mercury content of rice grain is controlled
Below state health standards limit value, rice yield is not also decreased obviously.
Claims (1)
1. a kind of phosphate fertilizer method reducing rice grain mercury content in severe mercury pollution rice field, is characterized in that: in severe hydrargyrum
In pollution rice field (soil hg concentration is 2mg/kg, reaches 4 times of national limit standard), total phosphorus application amount is 100kg/hm2(in apply
Phosphorus level, with effective ingredient p2o5Meter), apply in three times, respectively before Oryza sativa L. is transplanted seedlings the total phosphorus application amount of 3 days Shi 1/2, ear front 5
My god, the 1/4 of the total phosphorus application amount of latter 10 days each Shi of heading.
Transplant seedlings first 3 days apply phosphorus using spreading fertilizer over the fields, phosphate fertilizer is uniformly spread fertilizer over the fields in rice field.Ear first 5 days and latter 10 days apply of heading
Phosphorus adopts foliage-spray method, with water soluble phosphorous fertilizer spraying soluble in water, per hectare water consumption 300l.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610812227.5A CN106358553A (en) | 2016-09-08 | 2016-09-08 | Method for applying phosphate fertilizer to reduce content of mercury in rice grains of heavy mercury polluted rice field |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610812227.5A CN106358553A (en) | 2016-09-08 | 2016-09-08 | Method for applying phosphate fertilizer to reduce content of mercury in rice grains of heavy mercury polluted rice field |
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| CN201610812227.5A Pending CN106358553A (en) | 2016-09-08 | 2016-09-08 | Method for applying phosphate fertilizer to reduce content of mercury in rice grains of heavy mercury polluted rice field |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109220138A (en) * | 2018-09-29 | 2019-01-18 | 常州大学 | A kind of method that reduction rice grain cadmium content is administered in combination in silicophosphate fertilizer |
| RU2683637C1 (en) * | 2018-03-06 | 2019-03-29 | Федеральное государственное бюджетное учреждение науки Федеральный научный центр "Владикавказский научный центр Российской академии наук" (ВНЦ РАН) | Method for reducing mercury content in ecosystems |
| CN113396789A (en) * | 2021-07-07 | 2021-09-17 | 江苏省农业科学院 | Method for planting rice in weakly acidic soil with slight mercury pollution |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103435379A (en) * | 2013-08-13 | 2013-12-11 | 镇江市农业科学技术实业公司 | Manufacturing and applying method for fertilizer capable of reducing heavy metal pollution on strawberries |
| CN103548631A (en) * | 2013-10-24 | 2014-02-05 | 中国科学院高能物理研究所 | Method for reducing mercury content in rice |
| CN104488965A (en) * | 2014-11-17 | 2015-04-08 | 浙江大学 | Preparation capable of reducing mercury content in paddy rice grains and usage method thereof |
| CN105085004A (en) * | 2015-07-22 | 2015-11-25 | 中国水利水电科学研究院 | Compound fertilizer for mercury contaminated soil and preparation method therefor and application thereof |
-
2016
- 2016-09-08 CN CN201610812227.5A patent/CN106358553A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103435379A (en) * | 2013-08-13 | 2013-12-11 | 镇江市农业科学技术实业公司 | Manufacturing and applying method for fertilizer capable of reducing heavy metal pollution on strawberries |
| CN103548631A (en) * | 2013-10-24 | 2014-02-05 | 中国科学院高能物理研究所 | Method for reducing mercury content in rice |
| CN104488965A (en) * | 2014-11-17 | 2015-04-08 | 浙江大学 | Preparation capable of reducing mercury content in paddy rice grains and usage method thereof |
| CN105085004A (en) * | 2015-07-22 | 2015-11-25 | 中国水利水电科学研究院 | Compound fertilizer for mercury contaminated soil and preparation method therefor and application thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2683637C1 (en) * | 2018-03-06 | 2019-03-29 | Федеральное государственное бюджетное учреждение науки Федеральный научный центр "Владикавказский научный центр Российской академии наук" (ВНЦ РАН) | Method for reducing mercury content in ecosystems |
| CN109220138A (en) * | 2018-09-29 | 2019-01-18 | 常州大学 | A kind of method that reduction rice grain cadmium content is administered in combination in silicophosphate fertilizer |
| CN113396789A (en) * | 2021-07-07 | 2021-09-17 | 江苏省农业科学院 | Method for planting rice in weakly acidic soil with slight mercury pollution |
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Application publication date: 20170201 |