CN111887250B - Rice leaf surface conditioner and preparation and application methods thereof - Google Patents
Rice leaf surface conditioner and preparation and application methods thereof Download PDFInfo
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- CN111887250B CN111887250B CN202010759173.7A CN202010759173A CN111887250B CN 111887250 B CN111887250 B CN 111887250B CN 202010759173 A CN202010759173 A CN 202010759173A CN 111887250 B CN111887250 B CN 111887250B
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
- A01N37/44—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing at least one carboxylic group or a thio analogue, or a derivative thereof, and a nitrogen atom attached to the same carbon skeleton by a single or double bond, this nitrogen atom not being a member of a derivative or of a thio analogue of a carboxylic group, e.g. amino-carboxylic acids
- A01N37/46—N-acyl derivatives
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G7/00—Botany in general
- A01G7/06—Treatment of growing trees or plants, e.g. for preventing decay of wood, for tingeing flowers or wood, for prolonging the life of plants
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/02—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms
- A01N43/04—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with one hetero atom
- A01N43/14—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with one hetero atom six-membered rings
- A01N43/16—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with one hetero atom six-membered rings with oxygen as the ring hetero atom
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/02—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms
- A01N43/24—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with two or more hetero atoms
- A01N43/26—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with two or more hetero atoms five-membered rings
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F11/00—Other organic fertilisers
- C05F11/10—Fertilisers containing plant vitamins or hormones
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/50—Surfactants; Emulsifiers
-
- 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
- C05G5/00—Fertilisers characterised by their form
- C05G5/20—Liquid fertilisers
- C05G5/23—Solutions
Abstract
The application discloses rice foliage conditioner includes: lipoic acid, vitamin E, Tween 80 and antioxidant oligopeptide. After the foliar conditioner disclosed by the application is applied, each component has a synergistic interaction effect, so that the cadmium content in rice grains can be effectively reduced, and the content of potassium, magnesium, calcium, manganese and zinc nutrient elements can be improved. Meanwhile, the substances used in the method are food-grade safe raw materials, are safe, non-toxic and free of secondary pollution, and are low in application cost and simple and easy to implement.
Description
Technical Field
The application belongs to the technical field of agriculture, and particularly relates to a rice leaf surface conditioner and a preparation method and an application method thereof.
Background
The rice is the grain crop with the largest planting area in China and is also an important grain source in China. The rice is easy to enrich heavy metal cadmium, and potential threats are generated to human health through a food chain. The long-term low-dose cadmium exposure caused by eating the cadmium rice has three causes of carcinogenesis, teratogenesis and mutagenesis, and seriously threatens the safe production of grains and the health of human bodies.
In a rice field with cadmium pollution risk, harmful heavy metal element cadmium mainly utilizes a cell nutrient element transportation channel such as a non-selective cation channel and the like, and is absorbed and transported along with nutrient elements such as manganese and the like in a 'car-rubbing' mode, so that the cadmium content in rice is reduced, and simultaneously, the levels of other nutrient elements, particularly manganese, are also obviously reduced.
Therefore, while inhibiting the absorption of harmful element cadmium, many rice cadmium reduction products can also influence and even obviously reduce the content of nutrient elements such as manganese, iron, zinc and the like in rice, and severely restrict the application of the cadmium reduction agent. Therefore, how to ensure the accumulation or improvement of other nutrient elements while inhibiting the absorption of cadmium in rice is an urgent need to be solved, and is also a key problem to be solved by the invention.
At present, researches show that Chinese patent CN 104478555A discloses a preparation for ensuring safe output of rice planted in cadmium moderately and lightly polluted soil, and the preparation regulates absorption, migration and accumulation of cadmium in rice by bonding nutrients such as sulfhydryl-containing amino acid (L-methionine and L-cysteine), sodium silicate and potassium pyrophosphate and cadmium ions in cadmium-exposed rice, so as to relieve the problem of cadmium accumulation in rice to a certain extent, but the technology still has the following problems:
(1) the regulator is applied for a plurality of times, and at least 5 times of regulator is required to be applied in the whole growth period of the rice, including the land preparation before seedling transplanting and different growth periods of the rice, so that the operation is complicated, and the labor cost is increased.
(2) The regulator is applied in a large dose, and the amount of the preparation applied for the first time in the period 1 is higher than that used in the invention, so the cost is higher.
(3) The regulator has narrow application range and is only suitable for cadmium rice with medium and light cadmium polluted soil and medium and light cadmium exceeding standards (the cadmium content of the contrast grains is less than 0.28 mg/kg).
In addition, Chinese patent with publication number CN 103980030A discloses a preparation for reducing cadmium accumulation in crops and a using method thereof, the preparation utilizes nutrient elements of selenium and zinc, reduced glutathione and sodium silicate to reduce cadmium content in rice grains by foliage spraying, but the method also has the problem of multiple times of applying the regulator, and needs to spray A liquid and B liquid respectively in a seedling stage/tillering period and a heading stage/full heading stage, thus the operation is complicated and the labor cost is increased; in addition, the cadmium content of the contrast grain in the embodiment of the product is at a lower level of 0.071-0.109mg/kg, which is lower than the cadmium content standard of rice grains in China by 0.2mg/kg, namely, the rice production without applying the regulator in the patent reaches the standard, so the significance of the patent on the safe production of the rice in the cadmium-polluted soil is unknown.
Therefore, the method is very important for finding the rice cadmium reduction product which is more convenient to apply, higher in effect, lower in cost and free of inhibiting the absorption of other nutrient elements of rice grains, is popularized and applied to the treatment of the cadmium pollution risk area of the rice field soil on the basis of ensuring safety and no toxicity, realizes the safety production and quality improvement of agricultural products, and has important significance.
Disclosure of Invention
In view of the above-mentioned deficiencies in the prior art, the present application aims to provide a rice foliar conditioning agent which not only inhibits cadmium accumulation but also simultaneously improves absorption of other nutrient elements, and a preparation and application method thereof, compared with the prior art.
In a first aspect, a rice foliar conditioner comprises: lipoic acid, vitamin E, Tween 80 and antioxidant oligopeptide.
According to the technical scheme provided by the embodiment of the application, the antioxidant oligopeptide is one or two of carnosine and glutathione.
According to the technical scheme provided by the embodiment of the application, the leaf surface conditioner contains the following components in each liter:
according to the technical scheme provided by the embodiment of the application, the leaf surface conditioner contains the following components in each liter:
according to the technical scheme provided by the embodiment of the application, the leaf surface conditioner contains the following components in each liter:
in a second aspect, the preparation method of the rice foliar conditioner according to any one of the first aspect, comprises the steps of taking 1% of water, sequentially adding tween 80 and vitamin E, dissolving, adding water to 80%, sequentially adding lipoic acid, glutathione and carnosine, stirring and dissolving, and adding water to full amount to obtain the rice foliar conditioner.
In a third aspect, the application method of the rice foliar conditioning agent in any one of the first aspects is to spray the rice cadmium-reducing and manganese-increasing foliar conditioning agent at the heading and flowering stage of rice, wherein the application amount is 10L/mu, and the foliar spraying frequency is 1.
After the foliar conditioner disclosed by the application is applied, each component has a synergistic interaction effect, so that the cadmium content in rice grains can be effectively reduced, and the content of potassium, magnesium, calcium, manganese and zinc nutrient elements can be improved. Meanwhile, the substances used in the method are food-grade safe raw materials, are safe, non-toxic and free of secondary pollution, and are low in application cost and simple and easy to implement.
Detailed Description
The present application will be described in further detail with reference to examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the invention are shown.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail with reference to and in conjunction with examples.
The comparative examples and examples of the patent all use Hunan Tan heavy metal contaminated paddy fields, and the experimental fields are cadmium contaminated paddy fields (the cadmium content in soil is 0.55mg/kg, the pH value is 5.5< 6.5), and the soil pollution risk control standards (trial) of soil environment quality agricultural land soil are in accordance with the national standard of China
(GB15618-2018), the rice field is higher than a risk screening value and lower than a risk control value, so that the risk of soil pollution such as edible agricultural products not meeting quality safety standards exists, and safety utilization measures such as agricultural regulation and control should be taken in principle.
In addition, the comparative examples and the examples of the patent use 35 varieties of rice in the middle-early stage as tests; the specific implementation mode is as follows:
comparative example 1:
(1) the comparative example takes clear water as a leaf surface conditioner of the cadmium-reducing and nutrition-increasing elements of rice for standby.
(2) During the experiment, the field management mode was performed according to the local management mode. The foliar conditioner is applied under windless and rainless sunny weather, and is uniformly sprayed on the surfaces of rice leaves according to the amount of 10L/mu in the heading and flowering period of rice, so that the time period of carrying water by the rice leaves is avoided during spraying, and if the rice leaves rain within four hours after spraying, the foliar conditioner needs to be re-sprayed.
(3) After the rice is ripe, collecting the rice. After the foliar conditioning agent with the formula is applied, the cadmium rate, the manganese rate, the potassium rate, the magnesium rate, the calcium rate and the zinc rate of the rice are reduced.
Example 1:
(1) each liter of the leaf surface conditioner comprises 0.2g of carnosine, 0.2g of glutathione, 0.1g of lipoic acid, 0.2g of vitamin E and 0.05g of Tween; preparing materials according to the proportion, mixing the components, adding water to the required volume, and uniformly mixing to obtain the product for later use.
(2) During the experiment, the field management mode was performed according to the local management mode. The foliar conditioner is applied under windless and rainless sunny weather, and is uniformly sprayed on the surfaces of rice leaves according to the amount of 10L/mu in the heading and flowering period of rice, so that the time period of direct and violent sunlight and the time period of water carrying of the rice leaves are avoided during spraying, and re-spraying is needed if the rice leaves rain within four hours after spraying.
(3) After the rice is ripe, collecting the rice. After the foliar conditioning agent with the formula is applied, the cadmium rate, the manganese rate, the potassium rate, the magnesium rate, the calcium rate and the zinc rate of the rice are reduced.
Example 2:
(1) each liter of the leaf surface conditioner comprises 0.5g of carnosine, 0.5g of glutathione, 0.2g of lipoic acid, 0.4g of vitamin E and 0.1g of tween; preparing materials according to the proportion, mixing the components, adding water to the required volume, and uniformly mixing to obtain the product for later use.
(2) During the experiment, the field management mode was performed according to the local management mode. The foliar conditioner is applied under windless and rainless sunny weather, and is uniformly sprayed on the surfaces of rice leaves according to the amount of 10L/mu in the heading and flowering period of rice, so that the time period of direct and violent sunlight and the time period of water carrying of the rice leaves are avoided during spraying, and re-spraying is needed if the rice leaves rain within four hours after spraying.
(3) After the rice is ripe, collecting the rice. After the foliar conditioning agent with the formula is applied, the cadmium rate, the manganese rate, the potassium rate, the magnesium rate, the calcium rate and the zinc rate of the rice are reduced.
Example 3:
(1) each liter of the leaf surface conditioner comprises 1.0g of carnosine, 1.0g of glutathione, 0.3g of lipoic acid, 0.8g of vitamin E and 0.2g of tween; preparing materials according to the proportion, mixing the components, adding water to the required volume, and uniformly mixing to obtain the product for later use.
(2) During the experiment, the field management mode was performed according to the local management mode. The foliar conditioner is applied under windless and rainless sunny weather, and is uniformly sprayed on the surfaces of rice leaves according to the amount of 10L/mu in the heading and flowering period of rice, so that the time period of direct and violent sunlight and the time period of water carrying of the rice leaves are avoided during spraying, and re-spraying is needed if the rice leaves rain within four hours after spraying.
(3) After the rice is ripe, collecting the rice. After the foliar conditioning agent with the formula is applied, the cadmium rate, the manganese rate, the potassium rate, the magnesium rate, the calcium rate and the zinc rate of the rice are reduced.
Example 4:
(1) each liter of the leaf surface conditioner comprises 0.4g of carnosine, 0.1g of lipoic acid, 0.2g of vitamin E and 0.05g of Tween; preparing materials according to the proportion, mixing the components, adding water to the required volume, and uniformly mixing to obtain the product for later use.
(2) During the experiment, the field management mode was performed according to the local management mode. The foliar conditioner is applied under windless and rainless sunny weather, and is uniformly sprayed on the surfaces of rice leaves according to the amount of 10L/mu in the heading and flowering period of rice, so that the time period of direct and violent sunlight and the time period of water carrying of the rice leaves are avoided during spraying, and re-spraying is needed if the rice leaves rain within four hours after spraying.
(3) After the rice is ripe, collecting the rice. After the foliar conditioning agent with the formula is applied, the cadmium rate, the manganese rate, the potassium rate, the magnesium rate, the calcium rate and the zinc rate of the rice are reduced.
Example 5:
(1) each liter of the leaf surface conditioner comprises 1.0g of carnosine, 0.2g of lipoic acid, 0.4g of vitamin E and 0.1g of Tween; preparing materials according to the proportion, mixing the components, adding water to the required volume, and uniformly mixing to obtain the product for later use.
(2) During the experiment, the field management mode was performed according to the local management mode. The foliar conditioner is applied under windless and rainless sunny weather, and is uniformly sprayed on the surfaces of rice leaves according to the amount of 10L/mu in the heading and flowering period of rice, so that the time period of direct and violent sunlight and the time period of water carrying of the rice leaves are avoided during spraying, and re-spraying is needed if the rice leaves rain within four hours after spraying.
(3) After the rice is ripe, collecting the rice. After the foliar conditioning agent with the formula is applied, the cadmium rate, the manganese rate, the potassium rate, the magnesium rate, the calcium rate and the zinc rate of the rice are reduced.
Example 6:
(1) each liter of the leaf surface conditioner comprises 2.0g of carnosine, 0.3g of lipoic acid, 0.8g of vitamin E and 0.2g of Tween; preparing materials according to the proportion, mixing the components, adding water to the required volume, and uniformly mixing to obtain the product for later use.
(2) During the experiment, the field management mode was performed according to the local management mode. The foliar conditioner is applied under windless and rainless sunny weather, and is uniformly sprayed on the surfaces of rice leaves according to the amount of 10L/mu in the heading and flowering period of rice, so that the time period of direct and violent sunlight and the time period of water carrying of the rice leaves are avoided during spraying, and re-spraying is needed if the rice leaves rain within four hours after spraying.
(3) After the rice is ripe, collecting the rice. After the foliar conditioning agent with the formula is applied, the cadmium rate, the manganese rate, the potassium rate, the magnesium rate, the calcium rate and the zinc rate of the rice are reduced.
Example 7:
(1) each liter of the leaf surface conditioner comprises 0.4g of glutathione, 0.1g of lipoic acid, 0.2g of vitamin E and 0.05g of Tween; preparing materials according to the proportion, mixing the components, adding water to the required volume, and uniformly mixing to obtain the product for later use.
(2) During the experiment, the field management mode was performed according to the local management mode. The foliar conditioner is applied under windless and rainless sunny weather, and is uniformly sprayed on the surfaces of rice leaves according to the amount of 10L/mu in the heading and flowering period of rice, so that the time period of direct and violent sunlight and the time period of water carrying of the rice leaves are avoided during spraying, and re-spraying is needed if the rice leaves rain within four hours after spraying.
(3) After the rice is ripe, collecting the rice. After the foliar conditioning agent with the formula is applied, the cadmium rate, the manganese rate, the potassium rate, the magnesium rate, the calcium rate and the zinc rate of the rice are reduced.
Example 8:
(1) each liter of the leaf surface conditioner comprises 1.0g of glutathione, 0.2g of lipoic acid, 0.4g of vitamin E and 0.2g of Tween; preparing materials according to the proportion, mixing the components, adding water to the required volume, and uniformly mixing to obtain the product for later use.
(2) During the experiment, the field management mode was performed according to the local management mode. The foliar conditioner is applied under windless and rainless sunny weather, and is uniformly sprayed on the surfaces of rice leaves according to the amount of 10L/mu in the heading and flowering period of rice, so that the time period of direct and violent sunlight and the time period of water carrying of the rice leaves are avoided during spraying, and re-spraying is needed if the rice leaves rain within four hours after spraying.
(3) After the rice is ripe, collecting the rice. After the foliar conditioning agent with the formula is applied, the cadmium rate, the manganese rate, the potassium rate, the magnesium rate, the calcium rate and the zinc rate of the rice are reduced.
Example 9:
(1) each liter of the leaf surface conditioner comprises 2.0g of glutathione, 0.3g of lipoic acid, 0.8g of vitamin E and 0.2g of Tween; preparing materials according to the proportion, mixing the components, adding water to the required volume, and uniformly mixing to obtain the product for later use.
(2) During the experiment, the field management mode was performed according to the local management mode. The foliar conditioner is applied under windless and rainless sunny weather, and is uniformly sprayed on the surfaces of rice leaves according to the amount of 10L/mu in the heading and flowering period of rice, so that the time period of direct and violent sunlight and the time period of water carrying of the rice leaves are avoided during spraying, and re-spraying is needed if the rice leaves rain within four hours after spraying.
(3) After the rice is ripe, collecting the rice. After the foliar conditioning agent with the formula is applied, the cadmium rate, the manganese rate, the potassium rate, the magnesium rate, the calcium rate and the zinc rate of the rice are reduced. The rice of comparative example 1, example 2, example 3, example 4, example 5, example 6, example 7, example 8 and example 9 was subjected to determination of cadmium content and potassium, magnesium, calcium and manganese content as nutrient elements by a method referred to in the national food safety standards of the people's republic of china (GB5009.268-2016), and the results are shown in table 1:
TABLE 1
As can be seen from Table 1, the leaf surface conditioners of examples 1 to 9 of the present application are all more effective in reducing the cadmium content in rice than the leaf surface conditioner of comparative example 1, and at the same time, can mostly increase the contents of the nutrient elements of potassium, magnesium, calcium and manganese in rice.
Although the formula of the rice cadmium reduction agent also contains reduced glutathione component with the publication number of CN 103980030A, other components in the formula and the cadmium reduction principle of the components have obvious difference, particularly, the carnosine and the glutathione in the formula are combined and matched, a synergistic effect can be generated to achieve a better cadmium reduction effect, the level of nutrient elements of rice grains can be improved, the operation is simple, the good cadmium reduction effect can be achieved only by spraying once in the flowering period of rice, and the labor cost is greatly saved.
In addition, all the embodiments of the patent are carried out in a rice field with cadmium pollution risk, and soil pollution risks such as edible agricultural products not meeting quality safety standards exist, so that safety utilization measures such as agricultural regulation and control should be taken in principle. The cadmium content of the rice grains in the cadmium-polluted rice field selected by the patent reaches the level of 0.448mg/kg, exceeds the cadmium content standard of rice grains in China by more than 0.2mg/kg by one time, and the application of the leaf surface conditioner can reduce the cadmium content of the rice grains to 0.105mg/kg, has the effect of reducing the amplitude by 76.6 percent, is far better than that of the patent CN 103980030A, and is suitable for popularization and application in the cadmium-polluted risk area of the rice field soil.
In examples 1-3, example 2 has the best cadmium reduction effect, the content of cadmium in the rice kernel adopting the foliar conditioner of example 2 is reduced by 76%, and although the content of cadmium in the rice kernel adopting the foliar conditioner of example 3 is reduced by 76%, the content of the nutrient elements potassium, magnesium, calcium and manganese in the rice of example 2 is improved by the greatest amount, which is respectively increased by 121%, 155%, 68%, 43% and 11%.
Among examples 4 to 6, example 6 is the most effective in reducing cadmium; the cadmium content of the rice grain with the leaf surface conditioner of example 6 was reduced by 54%, but the increase in the content of the nutrient elements was relatively small. Examples 4 to 6, example 4, had a cadmium reduction effect; the content of cadmium in the leaf surface conditioner rice grains is reduced by 25%, and the content of nutrient elements of potassium, magnesium, calcium and manganese in the rice is improved by 27%, 35%, 9%, 10% and 2% respectively.
Among examples 7 to 9, example 8, the cadmium reduction effect was the best; the content of cadmium in rice grains is reduced by 49% by adopting the leaf surface conditioner in the embodiment 8, and the content of the nutrient elements of potassium, magnesium, calcium and manganese in rice is improved by 117%, 150%, 48%, 35% and 7% respectively.
In the above examples 1-9, compared with the comparative example 1, the content of heavy metal cadmium in rice grains is effectively reduced, and the content of other beneficial metal elements is not reduced or even increased.
In the embodiment, the addition of the Tween 80 can reduce the interfacial tension between the conditioner solution and the leaf surface, so that the active ingredients are better adsorbed on the leaf surface of the rice, thereby ensuring that the active ingredients can effectively enter into mesophyll cells of the rice to play an active role, and improving the utilization rate of the leaf surface conditioner; while the addition of a protectant plays an important role in maintaining the stability and activity of the ingredients of the present invention.
The active ingredients, namely the carnosine, the glutathione and the lipoic acid, in the embodiment have combined action, can obviously and specifically chelate and fix heavy metal cadmium, cadmium element can be fixed in the leaves in advance when the active ingredients are sprayed on the leaves in the flowering period of rice, so that the harmful element cadmium in the filling period of the rice is inhibited from being transferred to grains along with other elements from the leaves, the cadmium content of rice grains (edible parts) is finally reduced to be within the national safety standard (0.2mg/kg), and the absorption and accumulation of nutrient elements in the grains are not inhibited or even promoted. As shown by comparison of three groups of examples 1-3, 4-6 and 7-9, the combined compatibility of carnosine and glutathione can obviously reduce the cadmium content in rice grains and improve the contents of the nutrient elements of potassium, magnesium, calcium and manganese.
The five components in the formula are matched with each other, supplement each other, promote each other in function and complement each other, so that the cadmium content of the rice is reduced, the levels of other nutrient elements are improved, and the quality of the rice is improved on the basis of ensuring the safe production of the rice. In the embodiment 2, the cadmium reduction effect is best; the content of cadmium in rice grains is reduced by 76% by adopting the leaf surface conditioner in the embodiment 2, and the content of the nutrient elements of potassium, magnesium, calcium and manganese in rice is improved by 121%, 155%, 68%, 43% and 11% respectively. In example 2, a preferred example is a foliar conditioning agent comprising 0.5g carnosine, 0.5g glutathione, 0.2g lipoic acid, 0.4g vitamin E,0.1g tween.
In the leaf surface conditioner for reducing the cadmium and increasing the nutrient elements of the rice, active ingredients (carnosine, glutathione and lipoic acid), a surfactant Tween 80 and a protective agent vitamin E are supported with each other in function, so that the problem of reducing the cadmium and increasing the content of the nutrient elements of the rice is solved.
The embodiments of the present application have been described in detail, but the description is only for the preferred embodiments of the present application and should not be construed as limiting the scope of the application. All equivalent changes and modifications made within the scope of the present application shall fall within the scope of the present application.
Claims (3)
1. A rice leaf surface conditioner is characterized by comprising the following components in per liter of leaf surface conditioner:
0.4-2.0 g of carnosine;
0.1-0.3 g of lipoic acid;
0.2-0.8 g of vitamin E;
tween 800.05-0.2 g.
2. The rice foliar conditioner of claim 1, wherein the preparation method comprises the steps of taking 1% of water, sequentially adding tween 80 and vitamin E, dissolving, adding water to 80%, sequentially adding lipoic acid and carnosine, stirring to dissolve, and adding water to full amount to obtain the rice foliar conditioner.
3. The rice foliar conditioner according to any one of claims 1 to 2, wherein the application method is that the rice foliar conditioner is sprayed at the heading and flowering stage of rice in an amount of 10L/acre on foliar application for 1 time.
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| CN202010759173.7A CN111887250B (en) | 2020-07-31 | 2020-07-31 | Rice leaf surface conditioner and preparation and application methods thereof |
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| CN202010759173.7A CN111887250B (en) | 2020-07-31 | 2020-07-31 | Rice leaf surface conditioner and preparation and application methods thereof |
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| CN111887250A CN111887250A (en) | 2020-11-06 |
| CN111887250B true CN111887250B (en) | 2021-08-31 |
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| CN202010759173.7A Active CN111887250B (en) | 2020-07-31 | 2020-07-31 | Rice leaf surface conditioner and preparation and application methods thereof |
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| CN109122136A (en) * | 2018-07-24 | 2019-01-04 | 广东省生态环境技术研究所 | A kind of method of rice safety in production on mild or moderate heavy-metal contaminated soil |
| CN109892185A (en) * | 2019-04-01 | 2019-06-18 | 淮南师范学院 | Suppress the implantation methods of rice grain Cd accumulation in a kind of blade face |
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| CN101033458A (en) * | 2006-03-07 | 2007-09-12 | 上海旭太生物工程有限公司 | Serum-free animal cell culture medium and preparing method thereof |
| CN103980030A (en) * | 2014-02-19 | 2014-08-13 | 浙江大学 | Preparation for reducing accumulation of cadmium in crops and application method thereof |
| CN108967442A (en) * | 2018-07-24 | 2018-12-11 | 广东省生态环境技术研究所 | A kind of modified selenium sol of ferrous iron and the preparation method and application thereof inhibiting the accumulation of rice cadmium arsenic |
| CN109122136A (en) * | 2018-07-24 | 2019-01-04 | 广东省生态环境技术研究所 | A kind of method of rice safety in production on mild or moderate heavy-metal contaminated soil |
| CN109892185A (en) * | 2019-04-01 | 2019-06-18 | 淮南师范学院 | Suppress the implantation methods of rice grain Cd accumulation in a kind of blade face |
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