CN111837838A

CN111837838A - Planting method of selenium-rich rice

Info

Publication number: CN111837838A
Application number: CN202010607855.6A
Authority: CN
Inventors: 高扬华
Original assignee: Qidong Shuangqiao Grain Purchase And Sale Co Ltd
Current assignee: Qidong Shuangqiao Grain Purchase And Sale Co Ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2020-10-30

Abstract

A planting method of selenium-rich rice comprises the following steps: selecting a land with selenium content of 420 mu g +/-30 mu g/kg, and if the selenium content of the soil is insufficient, manually applying a selenium solution to improve the selenium content of the soil; applying the mixed fertilizer to the surface of each mu of paddy soil, applying 1000 parts of organic fertilizer to each mu of paddy soil, and applying the trace element fertilizer, the silicon fertilizer, the zinc fertilizer and the molybdenum fertilizer; selecting high-quality rice seedlings within 30 days and within 6 leaves, and transplanting the rice seedlings into a rice field; uniformly spraying selenium solution once in each of the seedling stage, the heading stage and the filling stage of the rice, spraying the selenium solution on the front and back surfaces of the leaves by using a sprayer, spraying 30kg solution per mu each time, and applying the selenium solution 20 days before harvesting at the latest; the grains are all hardened, the upper part of the cob is yellow, and 2/3 stalks are dried and withered, and then the grains are harvested. The planting method can effectively improve the selenium content of agricultural products and meet the requirement of human body on the intake of selenium element.

Description

Planting method of selenium-rich rice

Technical Field

The invention relates to the technical field of agriculture, in particular to a planting method of selenium-rich rice.

Background

The selenium-rich rice is obtained by supplementing selenium during rice planting. Belongs to functional agricultural products and has higher nutritive value. The pure natural selenium-rich rice is naturally grown from the selenium-rich soil. The whole biological process is that soluble selenate, selenite and the like mainly come from soil are absorbed by the roots of plants, then enter the internal circulation systems of the plants, participate in the synthesis of proteins through the path of roots, stems, leaves, glumes and grains, and finally, the selenium in the ionic state from the soil is stored in the seeds in the form of selenoprotein.

The selenium-rich rice is planted in two ways: one is that in the period from ear sprouting to grain filling of rice, a selenium-rich yield-increasing agent is uniformly sprayed on the leaf surface by a sprayer in the morning and evening of sunny weather, then inorganic selenium is converted into organic selenium through biotransformation and is stored in the rice so as to be absorbed by human bodies conveniently; the other is that the local soil is rich in selenium, and the produced rice naturally contains selenium, for example, the rice is in the Liuzhite area in the west of Guizhou province and is one of three famous natural selenium-rich zones in China, and the rice belongs to the tropical monsoon climate in North Asia China, so that the unique natural advantage is very favorable for the production of the natural selenium-rich rice. The combination of the two planting modes is more beneficial to improving the economic benefit of a planter and the selenium content of rice, thereby improving the market competitiveness and further improving the economic benefit of the planter.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the method overcomes the defects of the prior art, and provides a planting method of selenium-rich rice, which ensures that plants absorb and in-vivo biological functions are transformed by spraying selenium-rich solution on leaf surfaces during the growth and development of the rice, so that a large amount of organic selenium protein is generated in the rice.

The technical scheme adopted by the invention for solving the technical problems is as follows: a planting method of selenium-rich rice sequentially comprises the following steps:

s1, rice field selection: selecting a land containing selenium element with the content of 420 mu g +/-30 mu g/kg, and if the selenium content of the soil is insufficient, manually applying a selenium solution to 420 mu g +/-30 mu g/kg to improve the selenium content of the soil; the selenium content of each organ of the selenium-rich rice plant is gradually reduced from roots, stems, leaves and fruits, so that the land with high selenium content and fertile soil is selected as much as possible;

s2, rice field treatment: applying a mixed fertilizer to the surface of each mu of paddy field soil, applying 1000 parts of an organic fertilizer, 10-12 parts of nitrogen, 5-6 parts of phosphorus and 9-12 parts of potassium to each mu of paddy field soil, and applying a trace element fertilizer, a silicon fertilizer, a zinc fertilizer and a molybdenum fertilizer;

s3, selecting and transplanting seedlings: selecting high-quality rice seedlings within 30 days and within 6 leaves, transplanting the rice seedlings into a rice field, wherein the plant-row spacing is 16cm multiplied by 20 cm;

s4, foliar fertilization: according to the detected selenium content, uniformly spraying selenium solution once in each of a seedling stage, a heading stage and a filling stage of rice, namely, dissolving 2-12 g of a selenium supplement product containing 40-50% of selenium by using a small amount of water, adding 15kg of clear water, fully stirring uniformly, spraying the selenium solution on the front side and the back side of a blade by using a sprayer, generally spraying 30kg of solution per mu each time, and applying the selenium solution 20 days before harvesting at latest. The rice leaf surface has the characteristics of high speed and large absorption area, and the spraying in the heading period and the grouting period is favorable for absorbing a large amount of water, and is the key for improving the selenium content. In addition, the filling period, namely the rice is mature but not completely mature, the early harvesting period is the last step of selenium fertilizer spraying, the period is the key period for increasing the grain weight,

S5, harvesting: from the appearance of the rice ears, the grains are all hardened, the ear stems are dry and yellow, 2/3 stalks are dried and harvested.

Preferably, the seedling stage is 5-7 days before transplanting.

Preferably, the rice seedlings are high in quality, the quality reaches the national third-grade high-quality rice or more, and the selenium-rich rice produced by utilizing the high-quality rice varieties is deeply favored by consumers. The main high-quality medium rice varieties comprise million excellent 5431, million excellent 5455 and Xiang late long rice No. 13; the high-quality late rice varieties comprise Shengtaiyou 018, Taiyou 390, Longjinyou No. 1, Taoyouxiangzhan and Huarun No. 2.

Preferably, the selenium supplement product contains 44.7 percent of selenium.

Preferably, the selenium solution is sprayed until 30 days before harvest.

Preferably, the selenium solution is sprayed in step S4 at a time of 09:00-17:00 sunny day or afternoon on cloudy day. The selenium fertilizer can not be sprayed in rainy days, and the selenium fertilizer can be flushed away by rain, so that the selenium fertilizer can not be absorbed by rice and can not play a role, and the selenium fertilizer needs to be sprayed after being applied in rainy days.

The invention has the beneficial effects that: the selenium-rich solution is sprayed on the leaf surfaces of the rice plants, so that the plants can absorb the selenium and the in-vivo biological function can be converted, a large amount of organic selenoprotein is generated in the rice body, the selenium content of the rice obtained by the method reaches 0.3 mg/kg, and the rice has higher nutritional value.

Detailed Description

The present invention is further illustrated by the following examples.

A planting method of selenium-rich rice sequentially comprises the following steps,

s1, rice field selection: selecting a land containing selenium element with the content of 420 mu g +/-30 mu g/kg, and if the selenium content of the soil is insufficient, manually applying a selenium solution to 420 mu g +/-30 mu g/kg to improve the selenium content of the soil;

s3, selecting and transplanting seedlings: selecting high-quality rice seedlings within 30 days and within 6 leaves, transplanting the rice seedlings into a rice field, wherein the row spacing of the rice seedlings is 16cm multiplied by 20 cm;

s4, foliar fertilization: according to the detected selenium content, uniformly spraying a selenium solution once in each of a seedling stage, a heading stage and a filling stage of rice, namely, dissolving 2-12 g of a selenium supplement product containing 40-50% of selenium by using a small amount of water, adding 15kg of clear water, fully and uniformly stirring, spraying the solution on the front side and the back side of a blade by using a sprayer, spraying 30kg of solution per mu each time, and applying the solution 20 days before harvesting at latest.

In this embodiment, the seedling stage in step S4 is 5-7 days before transplanting.

In this embodiment, the rice seedlings selected in step S2 have high quality, which meets the national standard of high-quality rice grade three or more.

In this embodiment, the selenium content of the selenium supplement product in step S4 is 44.7%.

In this embodiment, the selenium solution is sprayed in step S4 at 09:00-17:00 sunny days or in the afternoon of cloudy days.

In this embodiment, the selenium solution in step S4 is sprayed until 30 days before harvesting.

In the embodiment, a proper amount of high-efficiency, low-toxicity and low-residue pesticide can be applied to ensure the pest control effect and protect the environment; the biological pesticide should be used as much as possible, and the pesticide should be sprayed in time according to the principle of prevention.

The present invention is not limited to the above embodiments, and various combinations and modifications of the above technical features may be provided for those skilled in the art, and modifications, variations, equivalents, or uses of the structure or method of the present invention in other fields without departing from the spirit and scope of the present invention are included in the protection scope of the present invention.

Claims

1. A planting method of selenium-rich rice is characterized by comprising the following steps: the method sequentially comprises the following steps of,

s1, rice field selection: selecting land containing selenium element up to 420 μ g + -30 μ g/kg, and artificially applying selenium solution to 420 μ g + -30 μ g/kg to improve the content of selenium in soil if the content of selenium in soil is insufficient;

s4, foliar fertilization: according to the detected selenium content, uniformly spraying a selenium solution once in each of a seedling stage, a heading stage and a grouting stage of rice, namely dissolving 2-12 g of a selenium supplement product containing 40-50% of selenium with a small amount of water, adding 15kg of clear water, fully and uniformly stirring, spraying the solution on the front side and the back side of a blade by using a sprayer, spraying 30kg of solution per mu each time, and applying the solution 20 days before harvesting at the latest;

2. The method for planting selenium-enriched rice as claimed in claim 1, wherein: and in the step S4, the seedling stage is 5-7 days before transplanting.

3. The method for planting selenium-enriched rice as claimed in claim 1, wherein: and S2, selecting rice seedlings with high quality, wherein the quality reaches the national third-grade high-quality rice standard or above.

4. The method for planting selenium-enriched rice as claimed in claim 1, wherein: in the step S4, the selenium content of the selenium supplement product is 44.7%.

5. The method for planting selenium-enriched rice as claimed in claim 1, wherein: the time for spraying the selenium solution in the step S4 is 09:00-17:00 on a sunny day or in the afternoon of a cloudy day.

6. The method for planting selenium-enriched rice as claimed in any one of claims 1 to 5, wherein: the step S4 is to stop spraying the selenium solution 30 days before harvesting.