CN102415252A

CN102415252A - Method for preparing selenium-rich rice

Info

Publication number: CN102415252A
Application number: CN2011102419139A
Authority: CN
Inventors: 吴建苏; 谢谋程; 尹正丰; 胡兴锁; 李家明
Original assignee: NANJING YUANWANG SELENIUM-RICH AGRICULTURAL PRODUCTS LLC
Current assignee: NANJING YUANWANG SELENIUM-RICH AGRICULTURAL PRODUCTS LLC
Priority date: 2011-08-23
Filing date: 2011-08-23
Publication date: 2012-04-18
Anticipated expiration: 2031-08-23
Also published as: CN102415252B

Abstract

The invention discloses a method for preparing selenium-rich rice and belongs to the technical field of daily necessities. The method comprises the following steps of: compounding compounds of nitrogen, phosphorus and potassium as well as trace elements, namely magnesium, zinc, copper, magnesium, boron, molybdenum and sulfur thereof into an aqueous solution; adding selenium dioxide in an amount which is 2 to 5 percent based on the total weight of the aqueous solution, regulating the pH value to be 7.0 to 8.5 by using ammonia water, and adding one or more of selenocysteine, selenocystine and selenomethionine in an amount which is 0.5 to 1.5 percent based on the amount of the obtained solution to obtain a selenium liquid soaking agent; soaking seeds at the water temperature of between 30 and 40 DEG C for more than 30 minutes and disinfecting, and soaking the seeds in the selenium liquid soaking agent for 2 to 3 days; growing seedlings and planting by the conventional method, and spraying 200ml of selenium-rich fertilizer which is diluted by using water in an amount which is 200 to 300 times that of the fertilizer to each mu of land in a cloudy day at a full heading stage of paddy rice, wherein the spraying times are not less than 15; and managing, harvesting and processing by the conventional method to obtain the selenium-rich rice. By the method for preparing the selenium-rich rice, the selenium content of the rice is remarkably improved, and the percentage composition of organic selenium in the total selenium of the rice is remarkably improved.

Description

A kind of preparation method of rice rich in selenium

Technical field: the invention belongs to the daily necessities technical field, be specifically related to a kind of rice rich in selenium preparation method.

Background technology: selenium is the important trace element of humans and animals, is the part that constitutes the indispensable glutathione peroxidase of higher mammal body biological metabolism.Human body lacks selenium can cause Keshan disease, Kaschin-Beck disease etc., is of value to motion body raising immunity and mend selenium.The international selenium recommendation adult of association selenium daily intaking amount 60-400 μ g, daily intaking amount 50-200 μ g recommends in Chinese Soclety of Nutrition.The protein of the 50-70% that China's 60% population is edible is from rice, and the rice selenium content is low, and it is very serious to the threat of human health to lack selenium.Mending selenium is significant for improving the people ' s health level.The industrialization of rich selenium rice has more development prospect extensively; Chinese patent publication number: CN02138001.5; The patent of invention title: a kind of selenium-enriched fertilizer and be used for the production method of selenium-rich rice discloses a kind of production method of selenium-rich rice, the method that this method adopts selenium-enriched fertilizer to spray; Actual production process exists the Se content skewness, the shortcoming that the fertilizer production process is long.Chinese patent publication number: CN200410009345.X rice rich in selenium, its production method and its purposes; Be processed into by rich selenium paddy; Described rich selenium paddy is through at paddy rice earing blooming stage; Rice leaf sprayed the cultivation of selenium-rich agent obtains, said selenium-rich agent by contain selenium inorganic compound and phosphate by weight amount ratio be: 10～20: 0.5～3 forms.The rice rich in selenium Se content that is provided is high, but also has the Se content skewness, the shortcoming that organic selenium content is on the low side.Selenium is divided into organic selenium and inorganic selenium.Japan and United States advanced country explicit order point out: organic selenium is the unique selenium sources of people, animal.China still allows to use inorganic selenium (sodium selenite, selenite).There is significant difference in both at aspects such as biologically active, toxicity and biological effectivenesses.1, goes machine selenium human absorptivity near 100%, inorganic selenium absorption ratio 30-40%; 2, organic selenium can store (liver) in vivo, be very beneficial for participating in the synthesising biological enzyme, and inorganic selenium can not store in vivo; 3, organic selenium does not form toxic reaction to human body; Inorganic toxicity is big, and is difficult for being absorbed.If normal person's intake every day surpasses 3000 little inorganic seleniums, will cause chronic poisoning.Cardinal symptom is: intestinal dysfunction, anaemia, trichomadesis, nail nervous system such as flake is impaired.

Summary of the invention: the objective of the invention is to propose a kind of preparation method of improved rice rich in selenium, thereby improve the capable machine Se content in the rice.

Method of the present invention realizes like this: the compound with nitrogen, phosphorus, potassium and trace element magnesium thereof, zinc, copper, manganese, boron, molybdenum, sulphur is re-dubbed the aqueous solution earlier; And then adding purity is the industrial goods selenium dioxide more than 99%; Addition is the 2-5% of aqueous solution gross weight; Stirring and dissolving, using ammoniacal liquor to regulate again and making its p H value is 7.0, inwards adds one or more in selenocysteine, selenocystine and the selenomethionine again; Addition is the 0.5-1.5% that the aqueous solution must be measured, and promptly processes the agent of a kind of selenium soaked with liquid; The rice seed treatment is employed in soaks sterilization more than 30 minutes under 30-40 ℃ the water temperature, after the sterilization at normal temperatures selenium soaked with liquid agent seed soaking 2-3 days; Grow seedlings, plant by conventional method then, at the paddy rice full heading time, choosing is cloudy, every mu adds with the agent of 200ml selenium soaked with liquid to spray after water 200-300 doubly dilutes, and sprays number of times and is no less than 15 times; Spray in back 12 hours in case of raining, fill spray 1 time, other according to conventional method management, results, processing both rice rich in selenium.

The production method of selenium-rich rice provided by the present invention, its advantage and good effect

1) significantly improves the rice selenium content

The seed that the agent of selenium soaked with liquid was soaked helps the absorption of plant to selenium.The foliage applying soaking agent can significantly improve the rice selenium content, and the selenium-rich rice selenium content is brought up to more than the 0.36mg/kg from the 0.05mg/kg of contrast, and does not influence the output of rice.

2) significantly improve organic selenium and account for total selenium percentage composition in the rice

The result shows, utilizes this method to produce in selenium-rich rice row machine selenium and accounts for total selenium percentage composition and significantly improve.Organic selenium content accounts for total Se content and reaches more than 90%.Therefore, because the organic selenium content that total Se content raising causes increases accordingly, improved the biological effectiveness of selenium in the selenium-rich rice in the selenium-rich rice.

That the present invention has is efficient, quick-acting, nontoxic, it is safe and reliable to spray, quality good, cost is low, the term of validity is long, characteristics such as widely applicable.

Embodiment: the inventive method is described in detail below in conjunction with embodiment.

Embodiment 1:

Compound with nitrogen, phosphorus, potassium and trace element magnesium thereof, zinc, copper, manganese, boron, molybdenum, sulphur is re-dubbed the aqueous solution earlier; And then to add purity be 99% industrial goods selenium dioxide, and addition is 5% of an aqueous solution gross weight, stirring and dissolving, and using ammoniacal liquor to regulate again and making its pH value is 8, inwards adding selenocystine again, addition is 1.5%, promptly processes the agent of a kind of selenium soaked with liquid.The rice seed treatment is employed in soaks sterilization more than 30 minutes under 40 ℃ the water temperature, after the sterilization at normal temperatures selenium soaked with liquid agent seed soaking 3 days; Grow seedlings, plant by conventional method then,, at the choosing cloudy day, spray after every mu of ground adds 300 times of dilutions of water with the agent of 200ml selenium soaked with liquid at the paddy rice full heading time; Spraying method: artificial sprayer or machine spray.Management method: the Routine Management method of common rice.Harvesting method: the conventional harvesting method of common rice.Processing method: the national standard according to GB 1354-1986 is carried out processing, becomes the best buy polished rice.Exfactory inspection: the high-quality Semen oryzae sativae rich in selenium must be through manufacturer's quality testing department by relevant criterion (like the Semen oryzae sativae rich in selenium company standard) after the assay was approved, and signing and issuing the quality certification can dispatch from the factory.The exfactory inspection project is: organoleptic indicator, moisture and selenium content etc.The high-quality Semen oryzae sativae rich in selenium selenium content that makes like this is 0.372mg/kg, and wherein organic selenium content is 0.346mg/kg, accounts for 93% of total Se content, meets the national standard that the cereal preparation selenium content adds.

Embodiment 2:

Compound with nitrogen, phosphorus, potassium and trace element magnesium thereof, zinc, copper, manganese, boron, molybdenum, sulphur is re-dubbed the aqueous solution earlier; And then to add purity be 99% industrial goods selenium dioxide, and addition is 2% of an aqueous solution gross weight, stirring and dissolving; Using ammoniacal liquor to regulate again and making its pH value is 7.0; Inwards adds selenocysteine again, and addition is 0.5%, promptly processes the agent of a kind of selenium soaked with liquid.The rice seed treatment is employed in soaks sterilization more than 30 minutes under 30 ℃ the water temperature, after the sterilization at normal temperatures selenium soaked with liquid agent seed soaking 2 days; Grow seedlings, plant by conventional method then,, at the choosing cloudy day, spray after every mu of ground adds 200 times of dilutions of water with the agent of 200ml selenium soaked with liquid at the paddy rice full heading time; Spraying method: artificial sprayer or machine spray.Management method: the Routine Management method of common rice.Harvesting method: the conventional harvesting method of common rice.Processing method: the national standard according to GB 1354-1986 is carried out processing, becomes the best buy polished rice.Exfactory inspection: the high-quality Semen oryzae sativae rich in selenium must be through manufacturer's quality testing department by relevant criterion (like the Semen oryzae sativae rich in selenium company standard) after the assay was approved, and signing and issuing the quality certification can dispatch from the factory.The exfactory inspection project is: organoleptic indicator, moisture and selenium content etc.The high-quality Semen oryzae sativae rich in selenium selenium content that makes like this is 0.368mg/kg, and wherein organic selenium content is 0.339mg/kg, accounts for 92% of total Se content, meets the national standard that the cereal preparation selenium content adds.

Claims

1. the preparation method of a rice rich in selenium is characterized in that elder generation is re-dubbed the aqueous solution with the compound of nitrogen, phosphorus, potassium and trace element magnesium thereof, zinc, copper, manganese, boron, molybdenum, sulphur; And then adding purity is the industrial goods selenium dioxide more than 99%; Addition is the 2-5% of aqueous solution gross weight; Stirring and dissolving, using ammoniacal liquor to regulate again and making its pH value is 7.0～8.5, inwards adds one or more in selenocysteine, selenocystine and the selenomethionine again; Addition is 0.5-1.5%, promptly processes the agent of a kind of selenium soaked with liquid; The rice seed treatment is employed in soaks sterilization more than 30 minutes under 30-40 ℃ the water temperature, after the sterilization at normal temperatures selenium soaked with liquid agent seed soaking 2-3 days; Grow seedlings, plant by conventional method then, at the paddy rice full heading time, choosing is cloudy, every mu adds with the agent of 200ml selenium soaked with liquid to spray after water 200-300 doubly dilutes, and sprays number of times and is no less than 15 times; Spray in back 12 hours in case of raining, fill spray 1 time, other according to conventional method management, results, processing both rice rich in selenium.