CN104478555A - Method for guaranteeing safe output of rice planted in moderate and mild cadmium contaminated soil and preparation used in method - Google Patents
Method for guaranteeing safe output of rice planted in moderate and mild cadmium contaminated soil and preparation used in method Download PDFInfo
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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
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- C05—FERTILISERS; MANUFACTURE THEREOF
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- C05B17/00—Other phosphatic fertilisers, e.g. soft rock phosphates, bone meal
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Abstract
The invention discloses a preparation for guaranteeing safe output of rice planted in moderate and mild cadmium contaminated soil. The preparation is prepared from the following main raw materials by weight: 20g to 30g of L-methionine, 150g to 220g of L-cysteine, 100g to 150g of sodium silicate, 100g to 120g of potassium pyrophosphate and 12g to 16g of compound sodium nitrophenolate. The invention also provides a preparation method of the preparation and also provides a method for guaranteeing safe output of the rice planted in the moderate and mild cadmium contaminated soil by utilizing the preparation. By adopting the preparation, the content of total cadmium in rice seeds planted in moderate and mild cadmium contaminated region is not larger than 0.2mg/kg.
Description
Technical field
To the invention belongs in environment protection heavy-metal contaminated soil to administer and agricultural product security field, relate to and a kind ofly ensure preparation of the rice grain Safety output that cadmium mild or moderate contaminated soil is planted and using method thereof.
Background technology
The situation is tense for China's heavy metal pollution of soil, had a strong impact on agricultural product quality and food safety." national Soil Pollution Investigation publication " that Environmental Protection Department and Ministry of Land and Resources combine issue on April 17th, 2014 shows national soil always to put an exceeding standard rate is 16.1%, and arable soil point position exceeding standard rate is more up to 19.4%.Wherein, the arable land of heavy metal cadmium, more than 1.33 ten thousand hm2, relates to 11 and economizes 25 areas.Cadmium is one of heavy metal element that known toxicity is the strongest, its transport property is stronger, easily be absorbed by plants and be transferred to over-ground part, thus cause plant quality to decline, and threaten human health by food chain, also can to crop growth damage when cadmium exceedes certain limit simultaneously, cause plant biomass to decline.The mankind take in for a long time by the agricultural-food of cadmium severe contamination, comprise rice, vegetables etc., easily cause cadmium to accumulate in vivo, there will be the symptom of chronic cadium poisoning during beginning, cause " bone aching " time serious.
The Chinese staple food of 65% is rice, and therefore paddy rice becomes Chinese topmost food crop, but paddy rice is again absorb the stronger crop of cadmium ability in large farm crop, and its seed cadmium level is only second to romaine lettuce.In the area that some heavy metal contaminations are serious, the effective cadmium content in rice field or even national permissible value 26 times, often cause rice cadmium to exceed standard.China's food hygienic standard (GB2762-2012) is 0.2mg/kg to the limit standard of cadmium in rice, has investigation to show, in the rice on market, China many ground, about 10% cadmium content exceeds standard.Because the extensive feature with land use cultivated by China's grain, cause being difficult to take precautions against and stop Cadmium Pollution in Soils.
At present, about cadmium pollution soil restorative procedure comprises soil moved in improve the original method, leaching method and solidification method etc., these method cost intensive, need special device and professional, and can not tackle the problem at its root.Although the economic environmental protection of the phytoremediation technology of recent development, its cycle is very long and be not suitable for the few national conditions in the many arable lands of Chinese people.Therefore, by the absorption andaccumulation adopting suitable soil redeposition and agronomic measures etc. to control paddy rice cadmium, be the approach ensureing that the Main Economic of rice safety is feasible.
Publication number is that the Chinese patent of CN101507400A discloses a kind of method controlling heavy metal cadmium accumulation of paddy, the antagonistic action of this patent utilization manganese element heavy metal element cadmium, although realize when not affecting paddy rice normal growth and growing, the problem of Cd accumulation in rice can be alleviated to a certain extent, but still there is following problem in this technology: the adjust dosages that (1) uses is large, only just need when whole ground to use in soil in 15 ~ 90 kilograms of/hectare of, manganese amount bivalent manganese inner complex, cost is high; (2) application times is many, needs frequently to use bivalent manganese inner complex conditioning agent, complex operation, and add labor cost within the whole breeding time of paddy rice; (3) for paddy rice, manganese is within the scope of finite concentration, and it is trace element, is conducive to paddy growth, but after exceeding finite concentration, just become harmful element, suppress paddy growth, affect rice yield, this is for peasant household, is difficult to hold, and increases operation easier.Therefore needing to find paddy growth, is environmentally friendly, and paddy rice can be helped again to reduce the transport of the heavy metals such as cadmium in its body and accumulation simultaneously, realizes material that Safe Agricultural Product exports or preparation seems more have realistic meaning.
Summary of the invention
It is environmentally friendly that the technical problem to be solved in the present invention is to provide one, and paddy rice can be helped again to reduce the transport of the heavy metals such as cadmium in its body and accumulation simultaneously, realizes preparation that Safe Agricultural Product exports and using method.
In order to solve the problems of the technologies described above, the invention provides a kind of safe rice growth ensureing that cadmium mild or moderate contaminated soil (i.e. the soil of cadmium content≤1.5mg/kg) is planted and export preparation used (namely, reduce the preparation of cadmium content in rice grain), the main raw material of said preparation is made up of the component of following weight: METHIONINE 20-30g, Cys 150-220g, water glass 100-150g, potassium pyrophosphate 100-120g and sodium nitrophenolate 12-16g.
The safe rice growth that the present invention also provides the plantation of above-mentioned guarantee cadmium mild or moderate contaminated soil simultaneously exports the compound method of preparation used, comprises the steps:
1), add 1L water in reactor, regulate water temperature to 50-60 DEG C,
2), add METHIONINE 20-30g, Cys 150-220g (being preferably 150-210g), water glass 100-150g (being preferably 130-140g), potassium pyrophosphate 100-120g and sodium nitrophenolate 12-16g (being preferably 12-15g) successively in batches, after 50-60 DEG C of isothermal reaction 25-35min (being preferably 30min), next component is added again, until in 50-60 DEG C of isothermal reaction 25-35min (being preferably 30min) after adding as the sodium nitrophenolate of last component after each component adds;
3), step 2) gained reaction product is cooled to room temperature, filtration, sterilizing, is fillingly finished product---ensure that the safe rice growth of cadmium mild or moderate contaminated soil plantation exports preparation used (that is, reducing the preparation of cadmium content in rice grain).
Remarks illustrate: room temperature refers generally to 10-30 DEG C, filter and generally refer to 2500 object filter screens, and sterilizing generally refers in 121 DEG C of heating 20 minutes.
As preparation of the present invention the improvement of compound method:
Step 2) be: add METHIONINE 30g, Cys 210g, water glass 140g, potassium pyrophosphate 120g and sodium nitrophenolate 15g successively respectively.
The present invention also provides the safe rice growth output method utilizing the guarantee cadmium mild or moderate contaminated soil plantation that prepared by aforesaid method and the preparation that obtain carries out simultaneously:
(spraying) above-mentioned preparation is used respectively in following 5 periods:
Period is 1.: before rice transplanting during whole ground,
Period is 2.: transplant latter one month (basic close to or be in tillering phase), described transplanting is carried out after one week in whole ground administered formulation,
Period is 3.: 1st ~ 7 days paddy rice jointing stages,
Period is 4.: paddy rice blooming stage 1st ~ 5 days,
Period is 5.: after paddy rice blooming stage 7th ~ 21 days,
Period 1. ~ period 2.: each period uses once, and the consumption of each preparation is 2.5-3.5L/ mu, dilutes 200-300 doubly (volume is doubly) when using;
Period 3. ~ period 5.: each period uses once (morning 9 before), each above-mentioned preparation consumption 1.5-3.0L/ mu, dilutes 400-600 doubly (volume is doubly) when using.
Remarks illustrate: period 1. ~ period 2. directly facing to this soil spraying preparation, period 3. ~ period is 5. to rice root and foliage spraying preparation.
Safe rice growth as guarantee cadmium mild or moderate contaminated soil plantation of the present invention exports the improvement of method:
Period 1. ~ period 2.: the consumption of each preparation is preferably 3.0-3.5L/ mu, dilutes 250 times;
3. period be: 5th ~ 7 days paddy rice jointing stages (being more preferred from 5 ~ 6 days),
4. period be: paddy rice blooming stage 1st ~ 3 days (being more preferred from 2 ~ 3 days),
5. period be: after paddy rice blooming stage 14th ~ 16 days,
Period 3. ~ period 5.: the consumption of each preparation is preferably 1.5-1.8L/ mu, dilutes 500 times.
The present invention afterwards to maturation, according to rice growth characteristic, determines above-mentioned time of application in transplanting.
The invention has the beneficial effects as follows: invention formulation has preparation feature simple, easy to use.Composition of the present invention is specific amino acids, silicon and phosphorus nutrient and growth regulator sodium nitrophenolate, control cadmium in realization to move in rice grain, outside enrichment, also promote paddy growth, have no side effect, belong to environmentally friendly effective reduction cadmium to accumulate in rice grain, realize the preparation that Safe Agricultural Product exports.Carry out in the mode sprayed during use, similar with pesticide spraying, simple to operation, and in Rice Production, wholely, nursery, transplanting, field management all adopt agriculture ordinary method.
The technology of the present invention cardinal principle absorbs in paddy rice, moves and accumulate by adopting the nutrients such as amino acid (METHIONINE and Cys), water glass and the potassium pyrophosphate containing sulfydryl and cadmium ion generation bonding to carry out regulation and control cadmium to cadmium exposure paddy rice, finally realize mild or moderate cadmium pollution area rice grain Safety output.Pass through soil application on the one hand, make itself and cadmium that stronger bonding action occur, it is made to be deposited in soil, retardance paddy rice is to the absorption of cadmium, the above-mentioned specific amino acids and the inorganic nutrients material that absorb soil and foliage-spray is passed through on the other hand in growth process of riceplant, promote that the albumen containing respective substance synthesizes on the one hand, there is stronger bonding action in this proteinoid and cadmium, the nutrient absorbed on the other hand is as silicate, also there is stronger bonding action with cadmium in phosphate radicals etc., these effects change the chemical existing forms of cadmium in paddy rice, the cadmium of this kind of bonding is deposited in stems and leaves of rice, do not transport, thus reduce total cadmium content in cadmium exposure paddy rice seed, realize seed Safety output.The present invention provides good solution route in the rice grain cadmium pollution of mild or moderate cadmium pollution area.
In sum, the rice grain cadmium content that the present invention can realize planting in mild or moderate cadmium pollution area limits the limit value of cadmium in rice lower than China's food hygienic standard (GB2762-2012), and namely total cadmium must not more than 0.2mg/kg; And preparation of the present invention is easy to preparation, simultaneously easy and simple to handle, with low cost, be highly suitable for agriculture Production of Large Fields.
Embodiment
Embodiment 1,
Ensure that the safe rice growth of cadmium mild or moderate contaminated soil plantation exports the compound method of preparation used: in reactor, add 1L water, regulate water temperature to 50-60 DEG C, add METHIONINE 30g respectively successively, Cys 210g, water glass 140g, potassium pyrophosphate 120g and sodium nitrophenolate 15g, adds next component again after each component adds after 50-60 DEG C of isothermal reaction 30min, until in 50-60 DEG C of isothermal reaction 30min after adding as the sodium nitrophenolate of last component; Gained reaction product is cooled to room temperature, filtration (cross 2500 object filter screens), sterilizing (in 121 DEG C of heating 20 minutes), is fillingly finished product---ensure that the safe rice growth of cadmium mild or moderate contaminated soil plantation exports preparation used (that is, reducing the preparation of cadmium content in rice grain).
Adopt above-mentioned preparation to carry out plot experiment, contaminated soil test potted plant [earthen container, volume, diameter 0.4m, high 0.4m], soil used picks up from Shangyu, Zhejiang, and Cadmium in Soil content is 0.82mg/kg.Potted plant growth paddy rice, adopts two rice varieties, and one is " good 33 ", and one is " China two excellent 164 ", and two rice varieties are arranged to preparation process respectively and do not process (contrast).During the front whole ground of rice transplanting and latter one month of rice transplanting (transplanting), respectively to using above-mentioned preparation in soil, each above-mentioned preparation consumption 3.5L/ mu, dilutes 250 times; After transplanting to maturation, according to rice growth characteristic, determine time of application, after the 5th day jointing stage, blooming stage the 2nd day and blooming stage the 14th day, respectively use 1 above-mentioned preparation (before morning 9, to rice root and foliage spraying preparation), each amount of application is 1.7L/ mu, dilutes 500 times.After rice transplanting (transplanting) about 120 days, paddy rice was ripe, and results paddy rice, measures the total cadmium content content of the paddy rice grain of rice.The total cadmium content of the different treatment paddy rice grain of rice is in table 1.
Remarks illustrate:
Dilute 250 times, be: in 1 volume preparation doubly, add 249 volumes water doubly dilute.All the other by that analogy.
The method that the detection of cadmium content specifies by GB/T 5009.15 measures.
The total cadmium content of the paddy rice grain of rice (mg/kg) under table 1 different treatment
A, b, c, d represent 0.05 level difference significance.
As shown in Table 1, two rice varieties are after preparation process provided by the present invention, cadmium in the grain of rice significantly declines, after results, cadmium content limits the limit value (i.e. total cadmium must not more than 0.2mg/kg) of cadmium in rice lower than China's food hygienic standard (GB2762-2012) in seed, in good 33 grain of rices, total cadmium content is 0.024mg/kg, in China's two excellent 164 grain of rices, total cadmium content is 0.114mg/kg, visible employing preparation provided by the invention and using method thereof, the Safety output of the upper rice grain of mild or moderate cadmium pollution soil (i.e. the soil of cadmium content≤1.5mg/kg) can be realized.
Embodiment 2,
Ensure that the safe rice growth of cadmium mild or moderate contaminated soil plantation exports the compound method of preparation used: in reactor, add 1L water, regulate water temperature to 50-60 DEG C, add METHIONINE 25g, Cys 190g, water glass 130g, potassium pyrophosphate 110g and sodium nitrophenolate 14g successively in batches, after 50-60 DEG C of isothermal reaction 30min, next component is added again, until in 50-60 DEG C of isothermal reaction 30min after adding as the sodium nitrophenolate of last component after each component adds; Gained reaction product is cooled to room temperature, filtration, sterilizing, is fillingly finished product---ensure that the safe rice growth of cadmium mild or moderate contaminated soil plantation exports preparation used (that is, reducing the preparation of cadmium content in rice grain).
Adopt above-mentioned preparation to carry out plot experiment, contaminated soil test potted plant [earthen container, volume, diameter 0.4m, high 0.4m], soil used picks up from Shangyu, Zhejiang, and Cadmium in Soil content is 0.82mg/kg.Potted plant growth paddy rice, adopts two rice varieties, and one is China two excellent 164 for praising 33, one, and two rice varieties are arranged to preparation process respectively and do not process (contrast).During the front whole ground of rice transplanting and latter one month of rice transplanting (transplanting), respectively to using above-mentioned preparation in soil, each above-mentioned preparation consumption 3.2L/ mu, dilutes 250 times; After transplanting to maturation, according to rice growth characteristic, determine time of application, after the 6th day jointing stage, blooming stage the 3rd day and blooming stage the 16th day, respectively use 1 above-mentioned preparation (before morning 9, to rice root and foliage spraying preparation), each amount of application is 1.6L/ mu, dilutes 500 times.
After rice transplanting (transplanting) about 120 days, paddy rice was ripe, and results paddy rice, measures the total cadmium content content of the paddy rice grain of rice.The total cadmium content of the different treatment paddy rice grain of rice is in table 2.
The total cadmium content of the paddy rice grain of rice (mg/kg) under table 2 different treatment
A, b, c, d represent 0.05 level difference significance.
As shown in Table 2, two rice varieties are after preparation process provided by the present invention, cadmium in the grain of rice significantly declines, after results, cadmium content limits the limit value (i.e. total cadmium must not more than 0.2mg/kg) of cadmium in rice lower than China's food hygienic standard (GB2762-2012) in seed, in good 33 grain of rices, total cadmium content is 0.078mg/kg, in China's two excellent 164 grain of rices, total cadmium content is 0.137mg/kg, visible employing preparation provided by the invention and using method thereof, the Safety output of the upper rice grain of mild or moderate cadmium pollution soil (i.e. the soil of cadmium content≤1.5mg/kg) can be realized.
Embodiment 3,
Ensure that the safe rice growth of cadmium mild or moderate contaminated soil plantation exports the compound method of preparation used: in reactor, add 1L water, regulate water temperature to 50-60 DEG C, add METHIONINE 20g, Cys 150g, water glass 130g, potassium pyrophosphate 100g and sodium nitrophenolate 12g successively in batches, after 50-60 DEG C of isothermal reaction 30min, next component is added again, until in 50-60 DEG C of isothermal reaction 30min after adding as the sodium nitrophenolate of last component after each component adds; Gained reaction product is cooled to room temperature, filtration, sterilizing, is fillingly finished product---ensure that the safe rice growth of cadmium mild or moderate contaminated soil plantation exports preparation used (that is, reducing the preparation of cadmium content in rice grain).
Adopt above-mentioned preparation to carry out plot experiment, contaminated soil test potted plant [earthen container, volume, diameter 0.4m, high 0.4m], soil used picks up from Shangyu, Zhejiang, and Cadmium in Soil content is 0.82mg/kg.Potted plant growth paddy rice, adopts two rice varieties, and one is China two excellent 164 for praising 33, one, and two rice varieties are arranged to preparation process respectively and do not process (contrast).During the front whole ground of rice transplanting and latter one month of rice transplanting (transplanting), respectively to using above-mentioned preparation in soil, each above-mentioned preparation consumption 3.0L/ mu, dilutes 250 times; After transplanting to maturation, according to rice growth characteristic, determine time of application, after the 5th day jointing stage, blooming stage the 3rd day and blooming stage the 15th day, respectively use 1 above-mentioned preparation (before morning 9, to rice root and foliage spraying preparation), each amount of application is 1.5L/ mu, dilutes 500 times.After rice transplanting about 120 days, paddy rice was ripe, and results paddy rice, measures the total cadmium content content of the paddy rice grain of rice.The total cadmium content of the different treatment paddy rice grain of rice is in table 3.
The total cadmium content of the paddy rice grain of rice (mg/kg) under table 3 different treatment
A, b, c, d represent 0.05 level difference significance.
As shown in Table 3, two rice varieties are after preparation process provided by the present invention, cadmium in the grain of rice significantly declines, after results, cadmium content limits the limit value (i.e. total cadmium must not more than 0.2mg/kg) of cadmium in rice lower than China's food hygienic standard (GB2762-2012) in seed, in good 33 grain of rices, total cadmium content is 0.097mg/kg, in China's two excellent 164 grain of rices, total cadmium content is 0.154mg/kg, visible employing preparation provided by the invention and using method thereof, the Safety output of the upper rice grain of mild or moderate cadmium pollution soil (i.e. the soil of cadmium content≤1.5mg/kg) can be realized.
The use of comparative example 1-1, cancellation METHIONINE, the consumption by METHIONINE makes 0g into by 30g, and corresponding makes the amount of Cys into 240g by 210g; All the other are equal to embodiment 1.
Comparative example 1-2, " METHIONINE " is made into L-norvaline; Consumption is constant, and all the other are equal to embodiment 1.
Comparative example 2-1, make water glass into Sodium Tetraborate, consumption is constant, and all the other are equal to embodiment 1.
Comparative example 2-2, make water glass into Sodium Silicofluoride, consumption is constant, and all the other are equal to embodiment 1.
Comparative example 2-3, cancel the use of water glass, the consumption by water glass makes 0g into by 140g, accordingly by potassium pyrophosphate 120g by making 250g into, make sodium nitrophenolate into 25g by 15g; All the other are equal to embodiment 1.
Comparative example 3-1, potassium pyrophosphate made into pyrosulfuric acid acid potassium, consumption is constant, and all the other are equal to embodiment 1.
Comparative example 3-2, make potassium pyrophosphate into Sodium Acid Pyrophosphate, consumption is constant, and all the other are equal to embodiment 1.
The use of comparative example 3-3, cancellation potassium pyrophosphate, the consumption by potassium pyrophosphate makes 0g into by 120g, makes water glass into 250g accordingly by 140g, makes sodium nitrophenolate into 25g by 15g; All the other are equal to embodiment 1.
Comparative example 4-1, make sodium nitrophenolate into sodium phenylate, consumption is constant, and all the other are equal to embodiment 1.
Comparative example 4-2, make sodium nitrophenolate into Chemox PE sodium, consumption is constant, and all the other are equal to embodiment 1.
The use of comparative example 4-3, cancellation sodium nitrophenolate, the consumption by sodium nitrophenolate makes 0g into by 15g, and corresponding water glass makes 148g into by 140g, makes potassium pyrophosphate into 127g by 120g; All the other are equal to embodiment 1.
Contrast experiment: by the preparation of above-mentioned all comparative example gained, test according to method described in embodiment 1, acquired results is as following table 4:
Table 4 different comparative example gained preparation is on the impact (mg/kg) of the total cadmium content of the paddy rice grain of rice
| Contrast | Comparative example 1-1 | Comparative example 1-2 | Comparative example 2-1 | |
| Good 33 | 0.264a | 0.149b | 0.179b | 0.197b |
| China two excellent 164 | 0.278c | 0.194d | 0.231d | 0.224d |
| Comparative example 2-2 | Comparative example 2-3 | Comparative example 3-1 | Comparative example 3-2 | |
| Good 33 | 0.157b | 0.205b | 0.173b | 0.131b |
| China two excellent 164 | 0.213d | 0.223d | 0.207d | 0.199d |
| Comparative example 3-3 | Comparative example 4-1 | Comparative example 4-2 | Comparative example 4-3 | |
| Good 33 | 0.143b | 0.145b | 0.141b | 0.124b |
| China two excellent 164 | 0.184d | 0.197d | 0.193d | 0.189d |
A, b, c, d represent 0.05 level difference significance.
From table 4 comparative example result, component METHIONINE, water glass, potassium pyrosulfate, sodium nitrophenolate play very important role in preparation of the present invention, have the effect of stronger prevention cadmium to Migration And Concentration in seed.Want to realize the effect of this preparation in the Safety output ensureing rice grain on mild or moderate cadmium pollution soil, component of the present invention all plays indispensable effect, and they have the effect of synergy.
Finally, it is also to be noted that what enumerate above is only several specific embodiments of the present invention.Obviously, the invention is not restricted to above embodiment, many distortion can also be had.All distortion that those of ordinary skill in the art can directly derive from content disclosed by the invention or associate, all should think protection scope of the present invention.
Claims (5)
1. ensure that the safe rice growth of cadmium mild or moderate contaminated soil plantation exports preparation used, it is characterized in that the main raw material of said preparation is made up of the component of following weight:
METHIONINE 20-30g, Cys 150-220g, water glass 100-150g, potassium pyrophosphate 100-120g and sodium nitrophenolate 12-16g.
2. ensure that the safe rice growth of cadmium mild or moderate contaminated soil plantation exports the compound method of preparation used, it is characterized in that comprising the steps:
1), add 1L water in reactor, regulate water temperature to 50-60 DEG C,
2), add METHIONINE 20-30g, Cys 150-220g, water glass 100-150g, potassium pyrophosphate 100-120g and sodium nitrophenolate 12-16g successively in batches, after 50-60 DEG C of isothermal reaction 25-35min, next component is added again, until in 50-60 DEG C of isothermal reaction 25-35min after adding as the sodium nitrophenolate of last component after each component adds;
3), step 2) gained reaction product is cooled to room temperature, filtration, sterilizing, is fillingly finished product---ensure that the safe rice growth of cadmium mild or moderate contaminated soil plantation exports preparation used.
3. according to claim 2 preparation compound method, it is characterized in that:
Described step 2) be: add METHIONINE 30g, Cys 210g, water glass 140g, potassium pyrophosphate 120g and sodium nitrophenolate 15g successively respectively.
4. utilize method preparation as described in Claims 2 or 3 and the safe rice growth output method of guarantee cadmium mild or moderate contaminated soil plantation that the preparation that obtain carries out, it is characterized in that:
Above-mentioned preparation is used respectively in following 5 periods:
Period is 1.: before rice transplanting during whole ground,
Period is 2.: transplant latter one month, described transplanting is carried out after one week in whole ground administered formulation,
Period is 3.: 1st ~ 7 days paddy rice jointing stages,
Period is 4.: paddy rice blooming stage 1st ~ 5 days,
Period is 5.: after paddy rice blooming stage 7th ~ 21 days,
Period 1. ~ period 2.: each period uses once, and the consumption of each preparation is 2.5-3.5L/ mu, dilutes 200-300 doubly when using;
Period 3. ~ period 5.: each period uses once, each above-mentioned preparation consumption 1.5-3.0L/ mu, dilutes 400-600 doubly when using.
5. the safe rice growth of guarantee cadmium mild or moderate contaminated soil plantation according to claim 4 exports method, it is characterized in that:
Period 1. ~ period 2.: the consumption of each preparation is 3.0-3.5L/ mu, dilutes 250 times;
3. period be: 5th ~ 7 days paddy rice jointing stages,
4. period be: paddy rice blooming stage 1st ~ 3 days,
5. period be: after paddy rice blooming stage 14th ~ 16 days,
Period 3. ~ period 5.: the consumption of each preparation is 1.5-1.8L/ mu, dilutes 500 times.
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| CN106105926A (en) * | 2016-06-28 | 2016-11-16 | 华南农业大学 | A kind of reduce rice grain cadmium content under high concentration cadmium pollution execute silicon method |
| CN107047163A (en) * | 2017-04-22 | 2017-08-18 | 枞阳县横山生态农业有限公司 | A kind of regional paddy rice planting method of arsenic pollution |
| CN107087638A (en) * | 2017-03-10 | 2017-08-25 | 浙江大学 | Reduce the preparation of arsenic content and its preparation method and usage in rice grain |
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| CN107047163A (en) * | 2017-04-22 | 2017-08-18 | 枞阳县横山生态农业有限公司 | A kind of regional paddy rice planting method of arsenic pollution |
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