CN102972114A - Fertilizer applying method for controlling heavy metal cadmium accumulation of rice - Google Patents
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Abstract
The invention relates to a fertilizer applying method for controlling the heavy metal cadmium accumulation of rice and belongs to the technical field of rice planting. The method comprises the following steps that 1) the land preparation is carried out before the seedling transplanting, and sulfides are applied into soil and are fully and uniformly mixed with the soil; or the land preparation is carried out before at least 15 days of the seedling transplanting, sulfates are applied into the soil and are fully mixed with the soil, and the rice field is kept to be in a waterflooding state; 2) during the first top application in the rice production, the sulfides are scattered and applied, and in addition, the soil is kept to be in the waterflooding state; 3) the sulfides or the sulfates are applied according to steps 1) and 2) during the rice planting in each time in the first year or the second year, the method and the step for applying the sulfides or the sulfates after the second year are the same as those of 1) and 2), but the application quantity is halved or is reduced by 3/4, or the sulfides or the sulfates are applied according to the steps 1) and 2) every two years after the second year. The fertilizer applying method has the advantages that sulfur fertilizers with wide resources are used, the consumption is low, the price is low, the use cost is low, and the cadmium content in the rice can be obviously reduced.
Description
Technical field
The invention belongs to the Rice Cropping technical field, be specifically related to a kind of fertilizing method of controlling heavy metal cadmium accumulation of paddy.
Background technology
Cadmium is as a kind of toxic heavy metal, and its pollution to crops is day by day serious, and farmland pollution area expanding day attracts wide attention socially.In recent years, owing to reasons such as industrial "three wastes", dirty filling and a large amount of applying pesticides, fertilizer, heavy metals in farmland is polluted aggravation, and security issues become increasingly urgent for the rice heavy metal.According to Ministry of Agriculture's rice and quality of item supervision and inspection center 2002 and the result that China's various places quality of rice generally investigated safely in 2003, one of quality security problem of rice is the heavy metals exceeding standards such as cadmium, lead, exceeding standard rate is all above 10%, the rice cadmium content of some contaminated regions is up to 0.4-l.0 mg/kg, the highest license content 0.2 mg/kg that surpasses cadmium in China's cereal far away, oneself threatens food security and health, and control and the cadmium pollution of reduction rice need to be resolved hurrily.To control at present two important channels of paddy rice cadmium accumulation by selecting the low cadmium-accumulation kind and reducing the soil available Cd level by the agronomic technique measure.
For current paddy soil and the day by day serious present situation of rice heavy metal cadmium, a large amount of relevant paddy rice low cadmium-accumulation screening varieties hand mouth agronomic culture technical research have been carried out both at home and abroad.The accumulation of paddy rice (rice, lower with) cadmium exists extremely significant kind to ask that difference is the essence and basis of paddy rice low cadmium-accumulation screening varieties.Differences and the non-stable lasting difference of right paddy rice cadmium accumulation, the metabolic pathway of this species diversity and rice in utilization mineral element is closely related, or even these metabolic pathways have determined this species diversity, such as paddy rice the approach that utilizes of ferro element have just been determined the accumulation of paddy rice cadmium to a great extent.Current screening to the low cadmium-accumulation rice varieties is not taken above-mentioned factor into account, and often there is obvious areal variation in the low cadmium-accumulation kind that therefore screens, even also has significant difference between year.In current production, also can be used for the production of low cadmium-accumulation rice without any a rice varieties both at home and abroad.
The cadmium (available Cd) that can be absorbed by plants in the soil is to affect the paddy rice cadmium to absorb and the key factor that accumulates.Therefore, reduce the accumulation of rice cadmium by agronomic culture technical measures reduction paddy soil available Cd content its theoretical foundation is arranged.So oneself at home and abroad extensively carries out the current relevant research that accumulates by the approach such as the regulation and control of rice field rich water, scholar's earth pH regulation and control, soil redox potential regulation and control reduction rice cadmium.The rich water regulation and control reduce rice field available Cd content by rational fertilising and moisture irrigation technique exactly, it is a more effective approach that its medium-term and long-term waterflooding is irrigated, right long-term waterflooding is irrigated and is expended a large amount of irrigation waters, this is unpractical for water resource day by day serious northern China region and some southern drought regions, also be unfavorable for paddy growth, its value is very limited.Liming improves soil pH, and reducing paddy soil available Cd content also is a more effective Technology Ways, but there is great drawback in this technology.When the soil pH value improved, the metal mineral nutritive element contents such as soil available iron, zinc, manganese, copper, nickel declined to a great extent, grievous injury paddy growth and affect yield of brown rice.In view of Cadmium in Soil mainly by the absorption approach of the mineral nutrient elements such as iron, manganese, copper, zinc by root system absorption and utilization, by the constituent contents such as available iron of regulation and control in the soil, be control heavy metal cadmium accumulation of paddy important channel.Publication number is that the Chinese patent of CN101133710A discloses and utilizes Cadmium in Soil to enter this approach in the plant body by the iron Absorption And Metabolism approach of rice root, has invented by soil and has executed the ferrous fertile control rice cadmium accumulation agronomic technique of the attitude measure of integrating; Publication number is that the Chinese patent of CN101507400A then openly utilizes Cadmium in Soil to absorb approach by manganese to be absorbed by rice root and enter in the plant body and by the process that the manganese transporting pathway enters overground part and seed, invented utilization soil and executed chelating attitude manganese (divalence) and spray the agronomic technique measure that manganese control paddy rice cadmium accumulates.Yet, utilize chelating attitude divalent metal usage amount relatively bigger than normal, and price is higher, causes high expensive.
Summary of the invention
Problem for the prior art existence, the present invention is the most critical factor that the rice root cadmium absorbs and accumulates according to effective cadmium content of soil (concentration), utilize the chemical property of cadmium and the solvability of different compound in solution thereof etc., design provides a kind of technical scheme of controlling the fertilizing method of heavy metal cadmium accumulation of paddy.
Cadmium is a kind of transition elements, and divalent cadmium ion belongs to lewis acid (Lewis Acid, LA), and according to its " soft or hard acid theoretical ", it is as " soft acid ", can with S
2+(or sulfydryl-SH) (lewis base, " soft base ") forms highly stable compound.Cadmium in the plant body can with multiple sulfhydryl compound, form stable compound such as glutathione, phytochelatin (PCs) and cysteine etc., the key mechanism that this mechanism has generally been turned out to be the plant cadmium detoxifies.In the middle of the environment such as soil, Cd can form slightly solubility CdS by sulphide, and its dissociation constant only is 8.0 * 10
-27, even be 6.3 * 10 far below FeS(
-18).
Sulphur is the required moderate-element of crop, and it mainly exists with organic in soil, and organic sulphur can reach more than 80% of soil total sulfur in the paddy soil.In oxidisability (aerobic) soil, inorganic states sulphur mainly exists with the form of sulphate; In flooded soils, sulphate is reduced formation sulphide.Studies show that, if sulphur is excessive in the soil, in long-term inundating process, might causes the generation of hydrogen sulphide, and then cause paddy rice hydrogen sulfide poisoning (〉 0.03 mg/L).But because soil has a large amount of iron to have (existing with the reduction-state ferrous iron in the flooded soils), ferrous ion can form the slightly solubility ferrous sulfide with sulphide, significantly reduces concentration of hydrogen sulfide.So generally, except sulphate soil, hydrogen sulfide poisoning can not occur in the rice field.And in fact, comprise the many Rice Production state of China, and if any Bangladesh, often there are the generation of paddy rice a lack of sulfur symptom in China, India, the states such as Indonesia, and therefore, sulfur fertilizer also normal as fertilizer sources uses.
Utilize the chemical reaction equilibrium principle, although FeS and CdS are insoluble chemical compound, the dissociation constant of FeS is far above CdS, and therefore FeS also is easy to be replaced by Cd and forms the more CdS of indissoluble in soil; The most of time rice field all is in waterflooding and the stronger state of reproducibility, and the sulphate attitude inorganic sulfur in the soil by research and practice, has finally been developed the fertilizing method of control heavy metal cadmium accumulation of paddy substantially all to be reduced to these characteristics of sulphide.
Described a kind of method of controlling heavy metal cadmium accumulation of paddy, it is characterized in that adopting soil to execute the sulfur-containing compounds such as sulphide, sulphur and gypsum, improve and improve the paddy soil sulfide content by appropriateness, utilize sulphide and cadmium to form the slightly solubility cadmium sulfide, reduce effective cadmium level in the soil, and then reduce rice root to the absorption of cadmium, and reduce and the shop accumulation of control rice, specifically comprise:
Described a kind of fertilizing method of controlling heavy metal cadmium accumulation of paddy is characterized in that may further comprise the steps:
1) before shoot transplanting equipment, during whole ground, in soil, applies in sulphur 0.25～5.0 kg/666.7m
2Sulphide, and with the abundant mixing of soil; Or in shoot transplanting equipment before at least 15 days whole ground, in soil, apply in sulphur 0.25～5.0 kg/666.7m
2Sulphate, and with the abundant mixing of soil, keep the rice field to be in the waterflooding state;
When 2) topdress the first time in Rice Production, spread fertilizer over the fields in sulphur 0.25～5.0 kg/666.7m
2Sulphide, and keep the waterlogging state;
When 3) First Year and Second Year carry out Rice Cropping at every turn according to step 1) and 2) execute sulphide or sulphate, execute the method and step 1) and 2 of sulphide or sulphate after the Second Year) identical, but amount of application reduces by half or reduces 3/4, perhaps after the Second Year next year according to step 1) and 2) execute sulphide or sulphate.
Described a kind of fertilizing method of controlling heavy metal cadmium accumulation of paddy, it is characterized in that described sulphide is one or more mixtures in vulcanized sodium, potassium sulfide, calcium sulfide, pyrite, marcasite, magnetic iron ore and the sulphur, described sulphate is one or more mixtures in gypsum, ammonium sulfate, ferrous sulfate, iron sulfate, potassium sulphate, sodium sulphate, calcium sulphate and the magnesium sulfate.
Described a kind of fertilizing method of controlling heavy metal cadmium accumulation of paddy when it is characterized in that in the described step 1) before shoot transplanting equipment whole ground, applies in soil in sulphur 0.5～2.5 kg/666.7m
2Sulphide.
Described a kind of fertilizing method of controlling heavy metal cadmium accumulation of paddy is characterized in that before at least 15 days whole ground in shoot transplanting equipment in the described step 1), applies in soil in sulphur 0.5～2.5 kg/666.7m
2Sulphate.
Described a kind of fertilizing method of controlling heavy metal cadmium accumulation of paddy is characterized in that described step 2) in first time in Rice Production when topdressing, spread fertilizer over the fields in sulphur 0.5～2.5 kg/666.7m
2Sulphide.
Above-mentioned a kind of fertilizing method of controlling heavy metal cadmium accumulation of paddy, reasonable in design, the present invention uses the wide material sources sulfur fertilizer, usage amount is low, cheap, use cost is low, generally is applicable to rice field and the crops industrial land of the heavy, medium and light degree cadmium pollution of China's non-sulfuric acid salt soil, can significantly reduce the cadmium content in the rice.Simultaneously, the present invention can also provide as paddy growth the sulphur nutrition of sufficient (but inexcessive), promotes paddy growth and improves rice yield.Compared with prior art, the present invention is economical and effective more, and can think combination with sulfur fertilizer application technique traditionally, more can be accepted by vast farmers, and operating procedure is more simple.
Embodiment
Further specify the present invention below in conjunction with embodiment.
Experimental example 1:
1. experiment material is prepared
(1) cadmium pollution soil is prepared: utilized purple paddy to cultivate, also pass through the cadmium pollution soil of long-term Rice Cropping as this research experiment soil at China Paddy Rice Inst's Fuyang Experimental Base take 2004.
The main physicochemical character of soil: the content of organic matter 36.9 g/kg, full nitrogen 2.73 g/kg, full phosphorus 0.6 g/kg, full potassium 20.1 g/kg, alkali-hydrolyzable nitrogen 232 mg/kg, ammonium nitrogen 9.7 mg/kg, rapid available phosphorus 25.2 mg/kg, available potassium 65 mg/kg, pH 7.3, total cadmium content is 5.70 mg/kg, and it is that 60 mesh sieves are for subsequent use excessively after drying, pulverizing for 1.76 mg/kg. cadmium pollution soils that DTPA extracts the attitude cadmium content.
(2) rice shoot is cultivated: in the morning long-grained nonglutinous rice early 22 and in good early 02 as research material.
Seed through 30～35 ℃ of vernalization 24 h, is seeded in the casting bed of cleaning through dilute sulfuric acid, the culture experiment rice shoot with seed soaking spirit seed soaking 48 h.
2. experiment is processed:
Rice seedling is planted in the 10 L black plastic buckets that 9 kg cadmium pollution dry ground are housed.Three sulphuring treatments (in sulphur) of 0,0.01,0.05 g/kg are set, as the sulphur source, before rice transplanting, sulfur fertilizer are sneaked into cadmium pollution soil with vulcanized sodium, and mixing, the dress basin.After the dress basin, pour water immediately, be in an oxygen-free environment to guarantee soil.Rice seedling 4 caves that every pot transplanting is consistent, 3 strains of every cave, every processing repeats 3 times.Nitrogen, phosphorus, potassium apply with composite fertilizer, and every basin applies composite fertilizer 5 g.Water management except transplanting time keeps waterflooding in 7 days, is adopted conventional conventional management pattern other period.
3. mensuration project
In the sampling of rice harves phase, determination and analysis; Species test
The plant sample is divided into seed (polished rice) and overground part two parts.
Sample is dried 3 days to constant weight through 80 ℃.Dry sample is through pulverizing, and takes by weighing 0.5000g and disappear by the 1:3 proportioning concentration with red fuming nitric acid (RFNA) and perchloric acid to boil, and disappears to boil to be settled to 50ml with redistilled water afterwards, utilizes full spectrum direct-reading inductively coupled plasma atomic emission spectrometer (ICP-AES) mensuration cadmium content.
4. results and analysis
4.1 rice yield characteristic under the different disposal
Though be morning 22 or in good early 02, use sulfur fertilizer structure of output all made moderate progress by (table 1), this is mainly manifested in every total grain panicle number, the real grain of every fringe number.But use 0.05 mg/kg vulcanized sodium cause in good early 02 thousand kernel weight descend to some extent, but not remarkable.On output, use sulfur fertilizer improved middle morning 22 and in good early 02 output.Increase this angle of rice yield from sulfur fertilizer, the soil in this experiment probably effective sulphur is not enough.
The output of paddy rice performance under the different sulphuring treatments of table 1
4.2 rice plant cadmium content under the different disposal
Though be morning 22 or in good early 02, use sulfur fertilizer and all extremely significantly reduce plant and comprise on the ground and the cadmium content (table 2) in the seed.When 0.05 g/kg vulcanized sodium was processed, middle morning 22, the cadmium accumulating level of overground part only was 8.43% of contrast, and polished rice then is 5.74%; In good early then be respectively 10.29% and 4.66%, and when 0.01 g/kg vulcanized sodium was processed, the cadmium in the two material polished rice all was lower than national limit standard 0. 2mg/kg.
The different sulphuring treatments of table 2 are on the impact of rice plant cadmium accumulation
Test example 2:
1, experimental scheme:
This is tested, and Huan Yi village, town surrounded by mountains carried out in Fuyang City, Zhejiang Province in 2011.This town is throughout the year take abandoned mine copper metallurgy as through the Jiyuan.Because waste water is measured very much discharging, local paddy soil heavy metal cadmium is very serious, and the total cadmium content of scholar's earth is that 4.13 mg/kg. DTPA extract attitude cadmium content 1.29 mg/kg, is unsuitable for Rice Production.
The Da Qu comparative trial is adopted in experiment, does not establish repetition, and it is blank that experiment arranges vulcanized sodium processing, calcium sulphate (land plaster) and CK(), 0.5 mu of Da Qu area.Rice varieties is middle morning 22.Vulcanized sodium is processed: 1.25 kg calcium sulfides (in sulphur) apply as base manure when preparing soil in rice field; Calcium sulphate is processed: to being less than the whole ground of rice transplanting beginning in front 15 days, apply 1.25 kg calcium sulphate (in sulphur) during whole ground, apply rear maintenance waterflooding state; CK then takes conventional rich water quality management.
Harvest time, measure the actual rice yield of Da Qu and Cd concentration of brown rice.Be used for the sample that Cd concentration of brown rice is measured, adopt the sampling of Da Qu 5 point samplings.The polished rice sample is dried 3 days to constant weight through 80 ℃.Dry sample is through pulverizing, and takes by weighing 0.5000g and disappear by the 1:3 proportioning concentration with red fuming nitric acid (RFNA) and perchloric acid to boil, and disappears to boil to be settled to 50ml with redistilled water afterwards, utilizes full spectrum direct-reading inductively coupled plasma atomic emission spectrometer (ICP-AES) mensuration cadmium content.
2, results and analysis:
2.1 sulfur fertilizer is processed the early impact of 22 yield traitses of centering
Table 3 shows, no matter be that vulcanized sodium is processed, or calcium sulphate process all centering early number of productive ear, the real grain of an every fringe number yield traits of 22 produced obvious impact, though improved thousand kernel weight, not remarkable.Compare in contrast, vulcanized sodium processing and calcium sulphate are processed lower, and every mu of number of productive ear of middle morning 22 has increased respectively 0.87 ten thousand and 1.0 ten thousand, and the real grain of every fringe is several then to have increased respectively 8.28 and 8.08.But between processing, vulcanized sodium and calcium sulphate do not have notable difference.Finally, vulcanized sodium is processed and the calcium sulphate processing causes middle morning 22 output to increase respectively by 48.42 kg(9.0%) and 42.50 kg(7.9%), reach utmost point significance level.Consist of from output, vulcanized sodium and calcium sulphate are processed and are caused output to increase, and mainly realize with a real grain number that by increasing effective fringe this reflects that experiment field soil is likely that effective sulfur content is not enough; This also enlightens does not execute for a long time sulfur fertilizer here and has caused lack of soil sulfur, highlights the importance of sulfur fertilizer.
Table 3 sulfur fertilizer is processed the early impact of 22 yield traitses of centering
2.2 sulfur fertilizer is processed the impact of early 22 cadmiums accumulation of centering
No matter be that vulcanized sodium or calcium sulphate have all reduced the cadmium content in plant root, overground part and the seed extremely significantly.After vulcanized sodium was processed, the cadmium content in the seed for 10.24% of contrast, was 0.107 mg/kg only, is lower than GB 0.2 mg/kg; When calcium sulphate was processed, the cadmium content in the seed for 10.72% of contrast, was 0.112 mg/kg only, also is lower than GB.By analyzing root system cadmium level and whole cadmium accumulating level, vulcanized sodium and calcium sulphate are processed and are caused that cadmium significantly reduces in the seed, mainly are because root system significantly reduces the absorption of Cadmium in Soil.This shows, can control the accumulation of paddy rice cadmium by using sulfur fertilizer.
Table 4. sulfur fertilizer is processed the impact of early 22 cadmiums accumulation of centering
In the test example 2, when adopting before the shoot transplanting equipment whole ground, in soil, apply in sulphur 0.25 kg/666.7m
2, 1.5kg/666.7m
2, 3kg/666.7m
2Or 5.0 kg/666.7m
2Sulphide, and with the abundant mixing of soil; Or in shoot transplanting equipment before at least 15 days whole ground, in soil, apply in sulphur 0.25 kg/666.7m
2, 1.5kg/666.7m
2, 3kg/666.7m
2Or 5.0 kg/666.7m
2Sulphate, and with the abundant mixing of soil, keep the rice field to be in the waterflooding state; And spread fertilizer over the fields in sulphur 0.25 kg/666.7m when topdressing the first time in Rice Production
2, 1.5kg/666.7m
2, 3kg/666.7m
2Or 5.0 kg/666.7m
2Sulphide, and keep the waterlogging state; Sulphide adopts one or more mixtures in vulcanized sodium, potassium sulfide, calcium sulfide, pyrite, marcasite, magnetic iron ore and the sulphur, sulphate adopts one or more mixtures in gypsum, ammonium sulfate, ferrous sulfate, iron sulfate, potassium sulphate, sodium sulphate, calcium sulphate and the magnesium sulfate, and it also can reach the technique effect identical with test example 2 at last.
Claims (5)
1. fertilizing method of controlling heavy metal cadmium accumulation of paddy is characterized in that may further comprise the steps:
1) before shoot transplanting equipment, during whole ground, in soil, applies in sulphur 0.25～5.0 kg/666.7m
2Sulphide, and with the abundant mixing of soil; Or in shoot transplanting equipment before at least 15 days whole ground, in soil, apply in sulphur 0.25～5.0 kg/666.7m
2Sulphate, and with the abundant mixing of soil, keep the rice field to be in the waterflooding state;
When 2) topdress the first time in Rice Production, spread fertilizer over the fields in sulphur 0.25～5.0 kg/666.7m
2Sulphide, and keep the waterlogging state;
When 3) First Year and Second Year carry out Rice Cropping at every turn according to step 1) and 2) execute sulphide or sulphate, execute the method and step 1) and 2 of sulphide or sulphate after the Second Year) identical, but amount of application reduces by half or reduces 3/4, perhaps after the Second Year next year according to step 1) and 2) execute sulphide or sulphate.
2. a kind of fertilizing method of controlling heavy metal cadmium accumulation of paddy as claimed in claim 1, it is characterized in that described sulphide is one or more mixtures in vulcanized sodium, potassium sulfide, calcium sulfide, pyrite, marcasite, magnetic iron ore and the sulphur, described sulphate is one or more mixtures in gypsum, ammonium sulfate, ferrous sulfate, iron sulfate, potassium sulphate, sodium sulphate, calcium sulphate and the magnesium sulfate.
3. a kind of fertilizing method of controlling heavy metal cadmium accumulation of paddy as claimed in claim 1 when it is characterized in that in the described step 1) before shoot transplanting equipment whole ground, applies in soil in sulphur 0.5～2.5 kg/666.7m
2Sulphide.
4. a kind of fertilizing method of controlling heavy metal cadmium accumulation of paddy as claimed in claim 1 is characterized in that before at least 15 days whole ground in shoot transplanting equipment in the described step 1), applies in soil in sulphur 0.5～2.5 kg/666.7m
2Sulphate.
5. a kind of fertilizing method of controlling heavy metal cadmium accumulation of paddy as claimed in claim 1 is characterized in that described step 2) in first time in Rice Production when topdressing, spread fertilizer over the fields in sulphur 0.5～2.5 kg/666.7m
2Sulphide.
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| CN103385144B (en) * | 2013-06-18 | 2015-06-17 | 中国计量学院 | Rice planting method |
| CN103385144A (en) * | 2013-06-18 | 2013-11-13 | 中国计量学院 | Rice planting method |
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| CN103688813B (en) * | 2014-01-13 | 2015-09-09 | 傅胤超 | A kind of implantation methods reducing rice absorbing heavy metal cadmium |
| CN103805206B (en) * | 2014-02-18 | 2016-03-30 | 湖南有色金属研究院 | Neutral soil cadmium passivator and application method thereof |
| CN103805206A (en) * | 2014-02-18 | 2014-05-21 | 湖南有色金属研究院 | Passivator for cadmium in neutral soil and application method thereof |
| CN104025921A (en) * | 2014-06-04 | 2014-09-10 | 农业部环境保护科研监测所 | Application of NaHS as foliage conditioner for preventing and controlling accumulation of cadmium on paddy rice |
| CN104025921B (en) * | 2014-06-04 | 2016-01-20 | 农业部环境保护科研监测所 | NaHS is as the application of the leaf surface conditioning agent of resistance control paddy rice Cadmium Accumulation |
| CN105010391A (en) * | 2015-06-30 | 2015-11-04 | 湖南农业大学 | Rice cadmium reduction agent |
| CN105010391B (en) * | 2015-06-30 | 2018-01-19 | 佛山金葵子植物营养有限公司 | Cadmium agent drops in rice |
| CN106967836A (en) * | 2017-05-24 | 2017-07-21 | 袁隆平农业高科技股份有限公司 | The application of rice grain cadmium content related gene qGCd2 molecular labeling |
| CN106967836B (en) * | 2017-05-24 | 2020-10-30 | 袁隆平农业高科技股份有限公司 | Application of molecular marker of rice grain cadmium content related gene qGCd2 |
| CN107573947A (en) * | 2017-09-28 | 2018-01-12 | 湖南艾布鲁环保科技有限公司 | A kind of preparation method and applications of sodium base silicon soil conditioner |
| CN107889705A (en) * | 2017-11-23 | 2018-04-10 | 中国科学院南京土壤研究所 | Rice base applies passivator drop living imposed with tillering stage and combining for iron fertilizer root control drops cadmium method |
| CN108719285A (en) * | 2018-05-16 | 2018-11-02 | 湖南农业大学 | A kind of pest-resistant drop cadmium dressing agent for rice of diseases prevention |
| CN108901287A (en) * | 2018-07-12 | 2018-11-30 | 湖南农业大学 | A kind of fertilizing method reducing rice cadmium content in cadmium pollution rice field |
| CN109122143A (en) * | 2018-09-14 | 2019-01-04 | 国家地质实验测试中心 | A kind of technique in the micro- geochemistry barrier technique repairing heavy metal pollution rice transplanting rice cultivation field of root system |
| CN110447364A (en) * | 2019-07-02 | 2019-11-15 | 广东省生态环境技术研究所 | A kind of fertilizing method of cadmium pollution high-sulfur soil safety production crops |
| CN110447364B (en) * | 2019-07-02 | 2022-04-15 | 广东省生态环境技术研究所 | Fertilizing method for safely producing crops in cadmium-polluted high-sulfur soil |
| CN110963851A (en) * | 2019-11-18 | 2020-04-07 | 中国水稻研究所 | Novel organic fertilizer for controlling rice heavy metal cadmium pollution or accumulation and preparation and application methods thereof |
| CN110963851B (en) * | 2019-11-18 | 2021-06-25 | 中国水稻研究所 | Novel organic fertilizer for controlling rice heavy metal cadmium pollution or accumulation and preparation and application methods thereof |
| CN111362741A (en) * | 2020-03-21 | 2020-07-03 | 广东省农业科学院农业资源与环境研究所 | Fertilizer for reducing cadmium content in brown rice and application method thereof |
| CN111575011A (en) * | 2020-05-22 | 2020-08-25 | 赛恩斯环保股份有限公司 | Heavy metal contaminated soil composite remediation agent and application method thereof |
| CN113899650A (en) * | 2021-09-29 | 2022-01-07 | 云南农业大学 | Regulation and control method for promoting excessive absorption and lead accumulation of plant arabidopsis thaliana through mediation of thionin |
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