CN111470897A - Selenium-rich high-calcium rice foliar fertilizer and preparation method and application thereof - Google Patents
Selenium-rich high-calcium rice foliar fertilizer and preparation method and application thereof Download PDFInfo
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- CN111470897A CN111470897A CN202010174567.6A CN202010174567A CN111470897A CN 111470897 A CN111470897 A CN 111470897A CN 202010174567 A CN202010174567 A CN 202010174567A CN 111470897 A CN111470897 A CN 111470897A
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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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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C21/00—Methods of fertilising, sowing or planting
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C11/00—Other nitrogenous fertilisers
Abstract
The invention relates to a selenium-rich high-calcium rice foliar fertilizer and a preparation method and application thereof, wherein each liter of the foliar fertilizer contains 5-10 g of chitosan, 5-10 g of sodium selenite, 10-20 g of calcium gluconate, 0.5-2 g of melatonin, 5-10 g of polyaspartic acid, 15-30 g of potassium silicate and 5-10 g of citric acid. The foliar fertilizer provided by the invention is applied to foliar spraying in the full heading period or the filling period of rice, so that the rice yield can be obviously increased, and the taste value, quality and selenium and calcium content of rice can be improved. The foliar fertilizer has the advantages of simple preparation, convenient use, time and labor saving, low cost and obvious effect, and has multiple effects of yield increase, quality improvement and selenium-rich high-calcium nutrition reinforcement.
Description
Technical Field
The invention belongs to the field of crop nutrition-enriched leaf fertilizers, and particularly relates to a selenium-rich high-calcium rice leaf fertilizer as well as a preparation method and application thereof.
Background
Calcium is the source of our human life and is the most active and highest-content macroelement of the human body. Calcium plays a very important role in various stages of life and is one of the essential important elements for human health. Selenium is an essential trace element of human bodies and participates in a plurality of metabolic activities, immune defense and detoxification processes of the human bodies, and long-term selenium deficiency of the human bodies can cause a series of health problems, such as myocardial lesion and liver lesion, and a severe endemic disease, namely keshan disease, which has appeared in China is caused by selenium deficiency. According to statistics, more than 40 countries and regions in the world are lack of selenium, 2/3 China's native land is an internationally recognized selenium deficiency region and relates to 22 provinces (cities and regions), wherein Su, Zhe, Wan and other regions are serious selenium deficiency regions, and the selenium intake of about 7 hundred million people in the country is seriously insufficient for a long time. The selenium intake of China is only 36mg/d, which is obviously lower than the minimum recommended values of 50mg and 60mg per day of Chinese Nutrition society and the world health organization, and is less than 1/3 in Japan and America, and nutritional experts call for 'to grab the selenium supplement work of the whole people like grabbing iodine supplement'.
Selenium and calcium can not be prepared in organisms and can only be obtained from the environment, and the selenium and calcium in plants are the main way for supplementing selenium and calcium for human bodies, namely, the aim of supplementing selenium and calcium for human bodies is achieved by the way that people take foods such as meat, eggs and grains every day; the method for supplementing selenium and calcium has the advantages of no toxic or side effect, remarkable effect and low cost. The selenium and calcium are added into feed or fertilizer, and the selenium and calcium are supplemented to people in the selenium and calcium deficiency area through producing selenium and calcium-enriched meat, egg and milk, selenium and calcium-enriched grains, oil, tea, fruits, vegetables and the like.
Rice is one of the most important food crops in the world and is a ration on which 30 hundred million people live all over the world. The rice has more than 5000 years of history as the traditional staple food of Chinese, more than 8 hundred million people serve as the staple food or are often eaten, the consumption amount per year of Chinese is more than 1.2 hundred million tons, and particularly, the rice can be enriched in selenium and calcium and has the potential value of supplementing selenium and calcium for the whole people. The invention aims at supplementing selenium and calcium for rice in the prior art, and has complex operation and difficult popularization. For example, the sugar fermentation residue selenium-rich high-calcium rice organic fertilizer disclosed in chinese patent 201610913696.6 comprises 18 substances including sugar residue, potassium selenite, calcium chloride, calcium sulfate, calcium sulfite, horse manure, dog manure, goose manure, earthworm powder, composite bacteria, trace elements, an organic water-retaining agent, a dispersant, an organic conditioner, a penetrating agent, a regulator, a tackifier, a synergist and the like, and the components are complex, and the preparation method is complex and not beneficial to popularization.
Disclosure of Invention
The invention aims to provide a selenium-rich high-calcium rice foliar fertilizer and a preparation method and application thereof.
In order to achieve the above purpose, the invention provides the following technical scheme:
the invention provides a selenium-rich high-calcium rice foliar fertilizer, wherein each liter of foliar fertilizer contains the following raw materials by weight: 5 to 10g of chitosan, 5 to 10g of sodium selenite, 10 to 20g of calcium gluconate, 0.5 to 2g of melatonin, 5 to 10g of polyaspartic acid, 15 to 30g of potassium silicate and 5 to 10g of citric acid.
Preferably, the chitosan is one or a mixture of different molecular weights in the molecular weight range of 100KDa to 200 KDa.
The invention also provides a preparation method of the selenium-rich high-calcium rice foliar fertilizer, which comprises the following steps:
(1) mixing chitosan, sodium selenite, citric acid and water to obtain a chitosan selenium complex solution;
(2) and mixing the chitosan selenium complex solution with calcium gluconate, melatonin, polyaspartic acid and potassium silicate to obtain the selenium-rich high-calcium rice foliar fertilizer.
The invention also provides the application of the selenium-rich high-calcium rice foliar fertilizer in rice planting.
Preferably, the use time of the selenium-rich high-calcium rice foliar fertilizer is the heading stage or the filling stage of rice; the frequency of use was 1 application throughout the growth cycle of rice.
Preferably, the selenium-rich high-calcium rice foliar fertilizer is applied after being diluted; the dilution mode is water dilution; the weight ratio of the selenium-rich high-calcium rice foliar fertilizer to water is 1: (10-30).
Preferably, the usage amount of the diluted selenium-rich high-calcium rice foliar fertilizer is 5L-15L: 667m2。
Preferably, the application mode of the selenium-rich high-calcium rice foliar fertilizer is to use any one of an artificial sprayer, a mechanical sprayer or an unmanned aerial vehicle to spray the foliar of rice.
The invention provides a selenium-rich high-calcium rice foliar fertilizer, which selects various regulating substances and nutritional ingredients such as chitosan, sodium selenite, calcium gluconate, melatonin, polyaspartic acid, potassium silicate and the like according to a compatibility synergistic principle, and is particularly critical to the improvement of rice yield and the further enrichment of selenium and calcium due to the compound use of polyaspartic acid and potassium silicate; the rice foliar fertilizer provided by the invention has double effects of increasing the yield of rice and enriching the selenium and calcium. The results of the examples show that the selenium-rich high-calcium rice foliar fertilizer provided by the invention can be used for remarkably increasing the yield of rice and the taste value and quality of rice, and simultaneously improving the contents of selenium and calcium in the rice.
Detailed Description
The invention provides a selenium-rich high-calcium rice foliar fertilizer. In the invention, the selenium-rich high-calcium rice foliar fertilizer takes water as a solvent; each liter of the foliar fertilizer contains the following raw materials by weight: 5 to 10g of chitosan, 5 to 10g of sodium selenite, 10 to 20g of calcium gluconate, 0.5 to 2g of melatonin, 5 to 10g of polyaspartic acid, 15 to 30g of potassium silicate and 5 to 10g of citric acid. According to the principle of compatibility and synergism, multiple regulating substances and nutrient components such as chitosan, sodium selenite, calcium gluconate, melatonin, polyaspartic acid, potassium silicate and the like are selected, and the selenium-enriched calcium-enriched composite fertilizer has double effects of yield increase and selenium-enriched calcium nutrition fortification.
In the invention, the chitosan is preferably a mixture of one or more different molecular weights with the molecular weight of preferably 100KDa to 200 KDa. When the chitosan is a mixture of a plurality of different molecular weights, the chitosan with the molecular weight of 100KDa and the chitosan with the molecular weight of 200KDa are preferably selected as the chitosan mixture, and the mass ratio of the chitosan with the molecular weight of 100KDa to the chitosan with the molecular weight of 200KDa is preferably 1: 1. The chitosan has obvious effects on disease resistance induction, stress resistance, fruit and vegetable fresh keeping, pesticide synergism, soil improvement, growth promotion, yield increase, quality improvement and the like. However, the chitosan has complex components and huge molecular weight difference, the chitosan with different molecular weights has obvious effect difference on the regulation and control of crops, and different dissolving processes and preparation processes of the foliar fertilizer greatly influence the internal structure of the chitosan, thereby influencing the drug effect exertion, which is the reason why the chitosan is more researched and the practical production application is less. The invention adopts chitosan with molecular weight of 100 KDa-200 KDa, and can also adopt a form of mixing chitosan with different molecular weights within the range of 100 KDa-200 KDa, so that the rice yield increasing and selenium calcium enriching effects are optimal, and the contradiction that the drug effect is unstable and the quality of preparation products cannot be unified due to the difference of chitosan structure and molecular weight in the past can be effectively avoided.
In the invention, melatonin is an indoleamine compound widely existing in animals and plants, has multiple biological functions in plants, can enhance the biotic and abiotic stress tolerance of the plants, promote root development, reduce the transpiration of leaves, particularly has the effects of promoting selenium and calcium enrichment and reducing heavy metal absorption of crops, and can obviously improve the selenium and calcium enrichment and pollution reduction of rice.
The components of the foliar fertilizer provided by the invention are matched to play a role, so that the performances of chelation, dispersion, adsorption and the like of polyaspartic acid are fully played, a large amount of nutrients such as nitrogen, phosphorus, potassium and the like in soil are enriched, nutrient absorption is facilitated, the yield and the fertilizer utilization rate are improved, the foliar fertilizer has a good effect on maintaining the grouting and photosynthesis of rice, and the thousand seed weight and the yield are improved; and the potassium silicate contained in the rice leaf cell membrane can further improve the stability of the rice leaf cell membrane, the chlorophyll content and the photosynthesis rate, and promote the absorption and enrichment of selenium and calcium.
The invention has no special requirements for the sources of chitosan, sodium selenite, calcium gluconate, melatonin, polyaspartic acid, potassium silicate and citric acid, and can be obtained by adopting commercial products well known to those skilled in the art.
The invention also provides a preparation method of the selenium-rich high-calcium rice foliar fertilizer, which comprises the following steps:
(1) mixing chitosan, sodium selenite, citric acid and water to obtain a chitosan selenium complex solution;
(2) and mixing the chitosan selenium complex solution with calcium gluconate, melatonin, polyaspartic acid and potassium silicate to obtain the selenium-rich high-calcium rice foliar fertilizer.
The preparation method of the foliar fertilizer provided by the invention is simple, and the raw materials are easy to obtain and the price is low. Meanwhile, water is used as a medium, so that the method has remarkable environmental and social benefits, is beneficial to the physical health of operators, improves the safety, and is easy for market popularization.
The invention mixes chitosan, sodium selenite, citric acid and water to obtain chitosan selenium complex solution. In the invention, the citric acid can catalyze the complexation reaction of chitosan and sodium selenite to obtain a chitosan selenium complex solution; and the preparation of the complex first aids the subsequent dissolution of other substances.
The preparation of the chitosan selenium complex solution in the invention means that the chitosan and the sodium selenite are evenly mixed with water at room temperature.
After the chitosan selenium complex solution is obtained, the chitosan selenium complex solution is mixed with calcium gluconate, melatonin, polyaspartic acid and potassium silicate to obtain the selenium-rich high-calcium rice foliar fertilizer.
The invention also provides the application of the selenium-rich high-calcium rice foliar fertilizer in rice planting.
After the selenium-rich high-calcium rice foliar fertilizer is prepared, the selenium-rich high-calcium rice foliar fertilizer can be directly used after being diluted by water; the preferred dilution times of the selenium-rich high-calcium rice foliar fertilizer are 10-30 times; namely, the weight ratio of the selenium-rich high-calcium rice foliar fertilizer to the dilution water is 1: (10-30).
In the invention, the application amount of the diluted selenium-rich high-calcium rice foliar fertilizer in each mu of rice field is preferably 5L-15L, the application mode is preferably that one of an artificial sprayer, a mechanical sprayer or an unmanned aerial vehicle is used for spraying the leaf surfaces of rice, the spraying time is preferably the heading period or the filling period of the rice, and the selenium-rich high-calcium rice foliar fertilizer is sprayed once in the whole growth process of the rice.
The application method of the foliar fertilizer provided by the invention is convenient and the operation is simple. Even non-professional people can prepare and use easily, and the problems of waste of planting cost or reduction of effect caused by insufficient use amount and the like are avoided.
In order to further illustrate the invention, the selenium-rich high-calcium rice foliar fertilizer provided by the invention and the preparation method and application thereof are described in detail below with reference to the examples, but the invention should not be construed as being limited to the scope of the invention.
Example 1
A selenium-rich high-calcium rice foliar fertilizer and a preparation method thereof, the component content and the preparation steps are as follows:
(1) weighing 5g of chitosan with the molecular weight of 100KDa and 5g of sodium selenite, adding into 800m L water, and adding 5g of citric acid to obtain a chitosan selenium complex solution;
(2) respectively weighing 10g of calcium gluconate, 0.5g of melatonin, 5g of polyaspartic acid and 15g of potassium silicate, sequentially adding the calcium gluconate, the melatonin, the polyaspartic acid and the potassium silicate into the chitosan selenium complex solution obtained in the step (1), adding each component, stirring and dissolving uniformly, then adding the next component, and stirring and dissolving uniformly after adding the last component of potassium silicate;
(3) and (3) adding tap water into the mixed liquid obtained in the step (2), uniformly stirring, and dissolving to 1L to obtain the selenium-enriched high-calcium rice foliar fertilizer.
Example 2
A selenium-rich high-calcium rice foliar fertilizer and a preparation method thereof, the component content and the preparation steps are as follows:
(1) weighing 7g of chitosan with the molecular weight of 200KDa and 9g of sodium selenite, adding into 800m L water, and adding 7g of citric acid to obtain a chitosan selenium complex solution;
(2) respectively weighing 15g of calcium gluconate, 1.5g of melatonin, 9g of polyaspartic acid and 30g of potassium silicate, sequentially adding the calcium gluconate, the melatonin, the polyaspartic acid and the potassium silicate into the chitosan selenium complex solution obtained in the step (1), adding each component, stirring and dissolving uniformly, then adding the next component, and stirring and dissolving uniformly after adding the last component of potassium silicate;
(3) and (3) adding tap water into the mixed liquid obtained in the step (2), uniformly stirring, and dissolving to 1L to obtain the selenium-enriched high-calcium rice foliar fertilizer.
Example 3
A selenium-rich high-calcium rice foliar fertilizer and a preparation method thereof, the component content and the preparation steps are as follows:
(1) weighing 4g of chitosan with the molecular weight of 100KDa, 4g of chitosan with the molecular weight of 200KDa and 7g of sodium selenite, adding into 800m L water, and adding 9g of citric acid to obtain a chitosan selenium complex solution;
(2) respectively weighing 20g of calcium gluconate, 1g of melatonin, 7g of polyaspartic acid and 20g of potassium silicate, sequentially adding into the chitosan selenium complex solution obtained in the step (1), adding each component, stirring and dissolving uniformly, then adding the next component, and stirring and dissolving uniformly after adding the last component of potassium silicate;
(3) and (3) adding tap water into the mixed liquid obtained in the step (2), uniformly stirring, and dissolving to 1L to obtain the selenium-enriched high-calcium rice foliar fertilizer.
Comparative example 1
A selenium-rich high-calcium rice foliar fertilizer and a preparation method thereof, the component content and the preparation steps are as follows:
(1) weighing 6g of chitosan with the molecular weight of 500KDa and 6g of sodium selenite, adding into 800m L water, and adding 6g of citric acid to obtain a chitosan selenium complex solution;
(2) respectively weighing 12g of calcium gluconate, 0.8g of melatonin, 6g of polyaspartic acid and 16g of potassium silicate, sequentially adding the calcium gluconate, the melatonin, the polyaspartic acid and the potassium silicate into the chitosan selenium complex solution obtained in the step (1), adding each component, stirring and dissolving uniformly, then adding the next component, and stirring and dissolving uniformly after adding the last component of potassium silicate;
(3) and (3) adding tap water into the mixed liquid obtained in the step (2), uniformly stirring, and dissolving to 1L to obtain the selenium-enriched high-calcium rice foliar fertilizer.
Comparative example 2
A selenium-rich high-calcium rice foliar fertilizer and a preparation method thereof, the component content and the preparation steps are as follows:
(1) weighing 7g of sodium selenite, and adding the sodium selenite into 800m L water;
(2) respectively weighing 15g of calcium gluconate, 1.5g of melatonin, 7g of polyaspartic acid and 20g of potassium silicate, sequentially adding the calcium gluconate, the melatonin, the polyaspartic acid and the potassium silicate into the sodium selenite solution obtained in the step (1), adding each component, stirring and dissolving uniformly, then adding the next component, and stirring and dissolving uniformly after adding the last component of potassium silicate;
(3) and (3) adding tap water into the mixed liquid obtained in the step (2), uniformly stirring, and dissolving to 1L to obtain the selenium-enriched high-calcium rice foliar fertilizer.
Comparative example 3
A selenium-rich high-calcium rice foliar fertilizer and a preparation method thereof, the component content and the preparation steps are as follows:
(1) weighing 8g of chitosan with the molecular weight of 80KDa and 8g of sodium selenite, adding into 800m L water, and adding 6g of citric acid to obtain a chitosan selenium complex solution;
(2) weighing 15g of calcium gluconate, adding the calcium gluconate into the chitosan selenium complex solution obtained in the step (1), stirring and dissolving uniformly, then adding 24g of potassium silicate, and stirring and dissolving uniformly;
(3) and (3) adding tap water into the mixed liquid obtained in the step (2), uniformly stirring, and dissolving to 1L to obtain the selenium-enriched high-calcium rice foliar fertilizer.
Comparative example 4
A selenium-rich high-calcium rice foliar fertilizer and a preparation method thereof, the component content and the preparation steps are as follows:
(1) weighing 6g of chitosan with the molecular weight of 100KDa and 6g of sodium selenite, adding into 800m L water, and adding 6g of citric acid to obtain a chitosan selenium complex solution;
(2) respectively weighing 15g of calcium gluconate and 0.8g of melatonin, sequentially adding the calcium gluconate and the melatonin into the chitosan selenium complex solution obtained in the step (1), adding each component, stirring and dissolving uniformly, then adding the next component, and stirring and dissolving uniformly;
(3) and (3) adding tap water into the mixed liquid obtained in the step (2), uniformly stirring, and dissolving to 1L to obtain the selenium-enriched high-calcium rice foliar fertilizer.
Application example 1
The method is carried out in 2018 by taking Nanjing 9108 (selective breeding of agricultural academy of sciences of Jiangsu province) as a test object in a comprehensive demonstration base of modern agriculture (rice and wheat) science and technology of Jiangsu province, wherein the base is located in Lingqian town (118 degrees 51'E and 33 degrees 35' N) in Huaiyin Huai city of Jiangsu province, and the Huaihe is north. The previous crop of the test field is wheat (the yield is 515kg/667 m)2) The soil belongs to a mucky soil type, a 0 cm-20 cm soil layer contains 24.5g/kg of organic matter, 1.36g/kg of total nitrogen, 55.9g/kg of quick-acting phosphorus and 124.5 g/kg. of quick-acting potassium, the seedling is raised by blanket seedlings, the sowing period is 5 months and 28 days, the transplanting date is 6 months and 21 days, the row spacing of the transplanting rows is 30cm and × 12cm, 4 transplanting seedlings are planted in each hole, and the fertilizer and water management is that the application amount of a nitrogen fertilizer is 20kg/667m2The nitrogen fertilizer is applied according to the ratio of tillering fertilizer to panicle fertilizer being 7: 3, the tillering fertilizer is applied in equal quantity in two times of 7d and 14d after transplantation, the panicle fertilizer is applied in 2 times in the four leaf-pouring stage and two leaf-pouring stage, and the nitrogen (pure N) is mixed with phosphorus (P)2O5) Potassium (K)2O) ratio of 2: 1: 2, applying a phosphate fertilizer at one time, applying a potassium fertilizer in the same amount before ploughing and in the jointing stage, uniformly applying other management measures according to a high-yield cultivation management mode, spraying 30 times of the foliar fertilizer in the afternoon grouting period of 9-month and 11-day by using a manual sprayer in the embodiments 1-3 or the comparative examples 1-4, wherein the area of each treatment cell is 4 × 6m2Repeating the experiment for 3 times for each foliar fertilizer, spraying the pesticide amount to 530m L in each treatment district, spraying the same amount of clear water as a control, harvesting after 10 months and 28 days of maturity, and adjustingThe rice yield of the residential quarter is checked, the taste value and the contents of selenium and calcium of the rice are measured, and the test results are shown in table 1.
TABLE 1 Effect of foliar fertilizers on yield and quality increase of rice and selenium and calcium enrichment
As can be seen from table 1, the rice yield and the rice taste quality can be obviously increased and the rice selenium and calcium content can be increased by the treatment of the foliar fertilizer of the present invention, wherein the rice yield of examples 1 to 3 is respectively increased by 5.25%, 8.18% and 9.12% compared with the clear water control group, the rice taste values are respectively increased by 8.47%, 11.01% and 11.89%, the rice selenium content is respectively increased by 285.84%, 360.41% and 319.28%, the rice calcium content is respectively increased by 110.47%, 140.60% and 123.93%, the selenium content all reaches the national selenium-rich rice standard, especially, the rice taste value can be increased, the taste quality can be improved, the multiple effects of yield increase and quality improvement and selenium-calcium-rich nutrition enhancement can be achieved, and good application value can be shown.
Moreover, as can be seen from table 1, the addition of chitosan is crucial to the yield and quality increase of rice and the improvement of selenium-rich calcium of foliar fertilizer, especially the effect difference of the regulation and control effect of the chitosan with specific molecular weight on crops is significant, and the polyaspartic acid and potassium silicate are very critical to the yield increase of rice and the further enrichment of selenium and calcium; the leaf fertilizer provided by the invention has the advantages that various substances have compatibility and synergy effects, and the application of chitosan with different molecular weights can not only improve the contents of selenium and calcium in rice, but also greatly improve the yield of rice.
The invention provides a foliar fertilizer for promoting selenium-rich high-calcium nutrition enrichment of rice, and a preparation method and an application technology thereof. Rice is used as a carrier, and rice products rich in selenium and calcium elements are planted by improving and increasing the content of selenium and calcium in rice, so that the rice products are convenient for people to eat and absorb, the toxicity and safety risk caused by direct intake of common inorganic selenium and calcium in the selenium and calcium supplementing process are avoided, and the rice products have obvious significance for fundamentally improving the per capita selenium and calcium intake of people in China.
The present invention is not limited to the embodiments disclosed above, and the present invention is intended to cover various modifications and equivalent changes within the technical scope described in the technical solutions of the present invention and within the technical solutions of the claims, and any modifications or improvements that can be easily made by those skilled in the art of the present invention are within the scope of the present invention as claimed.
Claims (8)
1. The selenium-rich high-calcium rice foliar fertilizer is characterized in that each liter of foliar fertilizer contains the following raw materials by weight: 5 to 10g of chitosan, 5 to 10g of sodium selenite, 10 to 20g of calcium gluconate, 0.5 to 2g of melatonin, 5 to 10g of polyaspartic acid, 15 to 30g of potassium silicate and 5 to 10g of citric acid.
2. The foliar fertilizer for selenium-enriched high-calcium rice, as claimed in claim 1, is characterized in that: the chitosan is one or a mixture of different molecular weights in the molecular weight range of 100KDa to 200 KDa.
3. The preparation method of the selenium-rich high-calcium rice foliar fertilizer of claim 1 or 2, comprising the following steps:
(1) mixing chitosan, sodium selenite, citric acid and water to obtain a chitosan selenium complex solution;
(2) and mixing the chitosan selenium complex solution with calcium gluconate, melatonin, polyaspartic acid and potassium silicate to obtain the selenium-rich high-calcium rice foliar fertilizer.
4. The selenium-enriched high-calcium rice foliar fertilizer as claimed in any one of claims 1 to 2 or the application of the selenium-enriched high-calcium rice foliar fertilizer obtained by the preparation method as claimed in claim 3 in rice planting.
5. The application of the foliar fertilizer for the selenium-enriched high-calcium rice as claimed in claim 4, wherein the application time of the foliar fertilizer for the selenium-enriched high-calcium rice is the heading stage or the filling stage of the rice; the frequency of use was 1 application throughout the growth cycle of rice.
6. The application of the foliar fertilizer for the selenium-enriched high-calcium rice as claimed in claim 4 is applied after dilution; the dilution mode is water dilution; the weight ratio of the selenium-rich high-calcium rice foliar fertilizer to water is 1: (10-30).
7. The application of the foliar fertilizer as claimed in claim 6, wherein the usage amount of the diluted selenium-rich and high-calcium rice foliar fertilizer is 5L-15L: 667m2。
8. The application of the foliar fertilizer for the selenium-enriched high-calcium rice as claimed in any one of claims 4 to 7 is characterized in that any one of an artificial sprayer, a mechanical sprayer or an unmanned aerial vehicle is used for foliar spraying on the rice.
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| CN112390685A (en) * | 2020-11-26 | 2021-02-23 | 贵州大学 | Rice culture solution and rice culture method |
| CN112390685B (en) * | 2020-11-26 | 2022-04-01 | 贵州大学 | Rice culture solution and rice culture method |
| CN114315461A (en) * | 2021-12-27 | 2022-04-12 | 江苏徐淮地区淮阴农业科学研究所 | Selenium-rich foliar fertilizer, preparation method and application thereof, and planting method of selenium-rich asparagus |
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