CN112772317A - Method for planting low-cadmium second-crop ratoon rice of ratoon rice - Google Patents
Method for planting low-cadmium second-crop ratoon rice of ratoon rice Download PDFInfo
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- CN112772317A CN112772317A CN201911091574.3A CN201911091574A CN112772317A CN 112772317 A CN112772317 A CN 112772317A CN 201911091574 A CN201911091574 A CN 201911091574A CN 112772317 A CN112772317 A CN 112772317A
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- rice
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- cadmium
- silica sol
- ferrous sulfate
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- 241000209094 Oryza Species 0.000 title claims abstract description 83
- 235000007164 Oryza sativa Nutrition 0.000 title claims abstract description 81
- 235000009566 rice Nutrition 0.000 title claims abstract description 81
- 229910052793 cadmium Inorganic materials 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 17
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 claims abstract description 28
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims abstract description 26
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims abstract description 17
- 235000003891 ferrous sulphate Nutrition 0.000 claims abstract description 16
- 239000011790 ferrous sulphate Substances 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000003085 diluting agent Substances 0.000 claims abstract description 7
- 238000005507 spraying Methods 0.000 claims abstract description 3
- SURQXAFEQWPFPV-UHFFFAOYSA-L iron(2+) sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Fe+2].[O-]S([O-])(=O)=O SURQXAFEQWPFPV-UHFFFAOYSA-L 0.000 claims description 19
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 230000002378 acidificating effect Effects 0.000 claims description 2
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 abstract 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 18
- 229910052742 iron Inorganic materials 0.000 description 9
- 239000002689 soil Substances 0.000 description 7
- 239000003337 fertilizer Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- 239000000084 colloidal system Substances 0.000 description 4
- 210000005069 ears Anatomy 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 229960004887 ferric hydroxide Drugs 0.000 description 4
- IEECXTSVVFWGSE-UHFFFAOYSA-M iron(3+);oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Fe+3] IEECXTSVVFWGSE-UHFFFAOYSA-M 0.000 description 4
- 241000196324 Embryophyta Species 0.000 description 3
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 3
- 229910052785 arsenic Inorganic materials 0.000 description 3
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 3
- 235000013305 food Nutrition 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 235000013339 cereals Nutrition 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003306 harvesting Methods 0.000 description 2
- 239000003621 irrigation water Substances 0.000 description 2
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- 239000000575 pesticide Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241000238631 Hexapoda Species 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 229910010298 TiOSO4 Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 241000607479 Yersinia pestis Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002981 blocking agent Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000010903 husk Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- XBDUTCVQJHJTQZ-UHFFFAOYSA-L iron(2+) sulfate monohydrate Chemical compound O.[Fe+2].[O-]S([O-])(=O)=O XBDUTCVQJHJTQZ-UHFFFAOYSA-L 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 229940099596 manganese sulfate Drugs 0.000 description 1
- 235000007079 manganese sulphate Nutrition 0.000 description 1
- 239000011702 manganese sulphate Substances 0.000 description 1
- 229910000357 manganese(II) sulfate Inorganic materials 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000012954 risk control Methods 0.000 description 1
- 238000009340 sequential cropping Methods 0.000 description 1
- 238000003900 soil pollution Methods 0.000 description 1
- 238000003971 tillage Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G22/00—Cultivation of specific crops or plants not otherwise provided for
- A01G22/20—Cereals
- A01G22/22—Rice
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Environmental Sciences (AREA)
- Botany (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Cultivation Of Plants (AREA)
Abstract
The invention provides a method for planting secondary rice with low cadmium content in ratoon rice, which is characterized in that ferrous sulfate is scattered in the water of a rice field after the first crop is harvested; and spraying a silica sol diluent on the leaf surfaces at the end of the second jointing and booting period. The ferrous sulfate is applied in 20-40 kg/mu, and the silica sol is applied in 1-2 kg/mu. The cadmium content of the second crop of rice is easy to reach the pollution-free level, the planting cost is relatively low, the process is relatively simple and easy to implement, the yield is hardly influenced, the economy is more cost-effective, and the quality of the rice product is better.
Description
Technical Field
The invention belongs to the technical field of rice planting, and particularly relates to a method for planting low-cadmium second-crop ratoon rice of ratoon rice.
Background
The regenerated rice is a rice planting technology for two harvests. The first crop of rice is ripe, the upper 2/3 position of rice plant is cut off, the rice ear is harvested, the lower plant about 1/3 and root system are left, proper fertilizer application and cultivation are carried out, a crop of rice can be grown, and the second crop is harvested after the rice is ripe. The mode realizes one-time tillage, seedling raising and transplanting of the rice field, and harvesting of the two-season rice, and has the advantages of labor saving, seed saving, water saving, fertilizer saving, pesticide saving, seedling bed saving and the like. Due to the difference of illumination, air temperature and fertilizer supply capacity of the roots of plants in the growing period, the taste of the rice harvested in the second crop of the regenerated rice is usually obviously higher than that of the rice harvested in the first crop.
Due to the wide existence of cadmium pollution problems, the cadmium of the rice is very common to exceed the standard. According to the specification of nuisanceless food rice NY5115-2008, the limit of cadmium in the rice is 0.2 mg/kg. The sources of cadmium in rice mainly comprise soil, fertilizers including foliar fertilizers and irrigation water, wherein the cadmium in the soil is not easy to remove for restoration, the cadmium content in the rice and the rice is generally controlled by changing the soil condition and applying a blocking agent and a passivating agent, but the method is high in cost or complicated for rice fields with serious cadmium pollution, and the rice with the cadmium content lower than 0.2mg/kg are economically unpractical to be harvested under the condition.
The applicant finds that the cadmium content of the second crop of the regenerated rice is often lower than that of the first crop of the regenerated rice, but under the condition that the cadmium content of the first crop of the regenerated rice is higher than the limit of 0.2mg/kg, how to ensure that the cadmium content of the second crop of the regenerated rice is lower than the limit of 0.2mg/kg enables the second crop of the regenerated rice to become nuisanceless food rice is a technical problem to be solved.
Disclosure of Invention
In order to solve the technical problem, the invention provides a method for planting secondary rice with low cadmium content in ratoon rice, which is characterized in that ferrous sulfate is scattered in the water of a rice field after the first crop is harvested; and spraying a silica sol diluent on the leaf surfaces at the end of the second jointing and booting period.
The application amount of the ferrous sulfate is 20-40 kg/mu calculated by ferrous sulfate heptahydrate, and is mainly determined according to conditions of soil acidity and alkalinity and cadmium content and the condition of iron shells on roots of second-crop ratooning rice; after the first crop of rice ears is harvested, the rice ears are spread on the water surface of the rice field.
The ferrous sulfate can be ferrous sulfate monohydrate or ferrous sulfate heptahydrate, and has remarkable promotion effects on the development perfection of the iron shells on the surfaces of the existing roots and the newly-grown roots in the second crop of the regenerated rice, and the iron shells on the surfaces of the roots can play a good role in blocking the absorption of cadmium. The ferrous sulfate heptahydrate comprises ferrous sulfate heptahydrate which is a byproduct of a titanium dioxide device in a sulfuric acid method, the contained titanium, manganese and magnesium sulfate is beneficial to the development and perfection of a root surface iron shell, and partial nutrient elements required by the growth of rice can be provided, the lead content is generally lower than 50ppm, the cadmium content and the arsenic content are generally lower than 10ppm, and the lead content is lower than or meets the limit requirements of 200ppm and 10ppm specified by ecological indexes of lead, arsenic, cadmium, chromium and mercury in GB T23349-. After the ferrous sulfate is applied to the paddy field, the ferric hydroxide colloid is hydrolyzed to generate the ferric hydroxide colloid, and the ferric hydroxide colloid has large surface area and higher activity, so that the ferric hydroxide colloid can be used for perfectly repairing the existing root system root surface iron shell of the paddy rice and forming the new root system root surface iron shell in the initial stage, and has remarkable promoting effect.
The silica sol is preferably applied in an amount of 1-2 kg/mu in terms of the mass concentration of the silica gel of 30%, and the mass concentration range of the silica gel in the diluent can be 0.3-1.0%; after the silica sol diluent is sprayed on the leaf surfaces of rice, the cadmium in rice plants can be inhibited and prevented from transferring to rice ears and rice. The silica sol is preferably acidic silica sol with the pH value of 3.0-4.0, and the average particle size of the silica sol is preferably within the range of 5-10 nm; the silica sol with the average grain diameter of 5-10nm belongs to small-grain silica sol, can be easily absorbed by leaf surfaces to play a good cadmium-resisting role, and also has the advantages of higher viscosity of diluent and less dropping on the leaf surfaces; the purchase is convenient, and the price is relatively cheap.
According to the method for planting the second crop of the ratoon rice, the cadmium content of the harvested second crop of the rice is easy to reach the pollution-free level and is lower than 0.2mg/kg, the planting cost is relatively low, the process is relatively simple and easy to implement, the yield is hardly influenced, the economy is more cost-effective, the quality of the rice product is better, the taste is better, and a green and healthy pollution-free brand image is easily formed on the market.
Detailed Description
The technical solution of the present invention will be specifically described and illustrated with reference to the following examples, but the present invention is not limited thereto.
In the following examples and comparative examples, ratoon rice was planted in a Kendong county rice field, which was divided into 133m pieces2(0.2 mu) test field pieces. The regenerated rice variety is Longliangyouhuazhan, and the cadmium content of the refined white rice processed by the first crop of rice is 0.46 mg/kg. The cadmium content in the surface soil of 0-30cm of the rice field is 0.25mg/kg, the pH value is 5.7, the cadmium content is lower than the environmental quality of NY/T391-2013 green food production places and the environmental condition of NY/T5010-2016 pollution-free agricultural product planting production places (GB15618-2018 soil environmental quality agricultural land soil pollution risk control standard) specified in the environmental condition of 0.30mg/kg, but is still higher; the content of mercury, arsenic, lead, chromium, copper and other heavy metals in the soil is lower than the limit value specified by the standard. The cadmium introduced by irrigation water, fertilizer, pesticide and the like used in the planting process is very little and can be ignored. The ferrous sulfate is a byproduct of a sulfuric acid method titanium dioxide device, has the fineness of 60 meshes and contains FeSO47H2O 89.5％、MgSO42.1％、MnSO40.7％、TiOSO40.6% Pb50ppm, As7ppm, Cd6ppm, Cr80ppm, Hg2 ppm; silica sol, the mass concentration of silicon dioxide is 30 percent, the pH value is 3.6, and the average grain diameter of colloidal particles is 7 nm.
Example 1
After the first crop of rice ears are harvested, controlling the water depth to be 1-2cm, and broadcasting 2.0kg of ferrous sulfate to the water surface of the rice field; at the end of the second crop at the stage of jointing and booting, 0.30kg of silica sol is diluted by adding water to 10kg of total weight (equivalent to 1.5 kg/mu of 30% silica sol, and the mass concentration of the diluted liquid silicon dioxide is 0.45%) and sprayed on the leaf surfaces. The field management comprises fertilizing water and preventing and controlling plant diseases and insect pests according to a conventional method.
The amounts of ferrous sulfate, silica sol applied and the time of application are given in Table 1.
Examples 2 to 5
The second crop planting test of ratoon rice in example 1 was basically repeated, except that the application amount of ferrous sulfate or silica sol was different, and the silica sol was diluted to 10kg in total by adding water; the specific amounts and times used are shown in Table 1.
Comparative examples 1 to 8
The second crop planting test of the ratoon rice in the example 1 is basically repeated, the difference is that the application amounts of ferrous sulfate and silica sol are different, the silica sol is diluted to 10kg by adding water, and 10kg of water is sprayed in the comparative example 5; the ferrous sulfate, silica sol application rates and results for each control are shown in Table 2.
TABLE 1 application rates and application times of ferrous sulfate and silica sol in examples 1-5
TABLE 2 control examples 1-8 for the amounts and times of ferrous sulfate and silica sol applied
The growth of the second crop of regenerated rice, the iron husk of the roots and the cadmium content of the polished rice obtained by rice processing in each example and comparative example are shown in tables 3 and 4.
TABLE 3 growth of second crop of regenerated rice, root surface iron shell and cadmium content of polished rice in examples 1-5
Table 4 shows the growth conditions of the second crop of regenerated rice, the iron hull condition of the root surface and the cadmium content of polished rice in comparative examples 1 to 8
Claims (5)
1. A method for planting low-cadmium second-crop rice of ratoon rice is characterized in that ferrous sulfate is scattered in the water of a rice field after the first crop is harvested; and spraying a silica sol diluent on the leaf surfaces at the end of the second jointing and booting period.
2. The method for planting low-cadmium second cropping rice of ratoon rice as claimed in claim 1, wherein the application amount of the ferrous sulfate is 20-40 kg/mu in terms of ferrous sulfate heptahydrate.
3. The method for planting low-cadmium second cropping rice of ratoon rice as claimed in claim 1, wherein the silica sol is applied in an amount of 1-2 kg/mu in terms of silica mass concentration of 30%.
4. The method for planting low-cadmium rice for secondary cropping of ratoon rice as claimed in claim 2, wherein the mass concentration of silica in the silica sol diluent is in the range of 0.3-1.0%.
5. The method for growing secondary cropping rice with low cadmium in ratoon rice as claimed in claim 1, wherein the silica sol is acidic silica sol with pH of 3.0-4.0, and the average particle size of the colloidal particles is in the range of 5-10 nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911091574.3A CN112772317A (en) | 2019-11-10 | 2019-11-10 | Method for planting low-cadmium second-crop ratoon rice of ratoon rice |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911091574.3A CN112772317A (en) | 2019-11-10 | 2019-11-10 | Method for planting low-cadmium second-crop ratoon rice of ratoon rice |
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| Publication Number | Publication Date |
|---|---|
| CN112772317A true CN112772317A (en) | 2021-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911091574.3A Pending CN112772317A (en) | 2019-11-10 | 2019-11-10 | Method for planting low-cadmium second-crop ratoon rice of ratoon rice |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114600719A (en) * | 2022-04-02 | 2022-06-10 | 中国科学院南京土壤研究所 | Cultivation method for increasing yield of ratoon rice and reducing cadmium content and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103385144A (en) * | 2013-06-18 | 2013-11-13 | 中国计量学院 | Rice planting method |
| CN105393767A (en) * | 2015-11-19 | 2016-03-16 | 刘梅锡 | Anti-rice heavy metal pollution method |
| CN106069429A (en) * | 2016-06-12 | 2016-11-09 | 湖南永清环保研究院有限责任公司 | A kind of method reducing semilate rice Cd concentration of brown rice |
| US20180153109A1 (en) * | 2016-03-02 | 2018-06-07 | Guangdong Institute Of Eco-Environmental Science & Technology | Foliage blocking agent for precise regulation of expression of cadmium absorption and transportation-related gene in rice and application thereof |
| CN110122226A (en) * | 2019-05-09 | 2019-08-16 | 湘潭顺天农业科技开发有限公司 | A kind of ratooning rice green high yield inoculation method |
| CN110122225A (en) * | 2019-05-09 | 2019-08-16 | 邓述东 | It is a kind of cultivate one season rice, ratooning rice, wild mushroom farmland Efficient utilization method |
-
2019
- 2019-11-10 CN CN201911091574.3A patent/CN112772317A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103385144A (en) * | 2013-06-18 | 2013-11-13 | 中国计量学院 | Rice planting method |
| CN105393767A (en) * | 2015-11-19 | 2016-03-16 | 刘梅锡 | Anti-rice heavy metal pollution method |
| US20180153109A1 (en) * | 2016-03-02 | 2018-06-07 | Guangdong Institute Of Eco-Environmental Science & Technology | Foliage blocking agent for precise regulation of expression of cadmium absorption and transportation-related gene in rice and application thereof |
| CN106069429A (en) * | 2016-06-12 | 2016-11-09 | 湖南永清环保研究院有限责任公司 | A kind of method reducing semilate rice Cd concentration of brown rice |
| CN110122226A (en) * | 2019-05-09 | 2019-08-16 | 湘潭顺天农业科技开发有限公司 | A kind of ratooning rice green high yield inoculation method |
| CN110122225A (en) * | 2019-05-09 | 2019-08-16 | 邓述东 | It is a kind of cultivate one season rice, ratooning rice, wild mushroom farmland Efficient utilization method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114600719A (en) * | 2022-04-02 | 2022-06-10 | 中国科学院南京土壤研究所 | Cultivation method for increasing yield of ratoon rice and reducing cadmium content and application thereof |
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