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Method for increasing yield of selenium-enriched rice by increasing tillering

A rice production technology, applied in the field of nano-agriculture, can solve the problems of less than 20% utilization efficiency, serious soil environment, and no application amount mentioned, and achieve high bioavailability, improve soil environment, and increase effectiveness

Active Publication Date: 2022-07-08
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the utilization efficiency of these traditional Se fertilizers is less than 20%, and a large amount of Se fertilizers remain, causing serious soil environmental problems
However, there is no literature mentioning under what conditions Se NMs can stably and efficiently promote rice growth and increase Se content; nor does it mention how the application amount of Se NMs affects the accumulation of Se in crops; Whether Se NMs can achieve the goal of increasing selenium by regulating rice hormone levels, gene expression and rhizosphere environment, increasing nutrient utilization effectiveness, promoting rice tillering and growth

Method used

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  • Method for increasing yield of selenium-enriched rice by increasing tillering
  • Method for increasing yield of selenium-enriched rice by increasing tillering
  • Method for increasing yield of selenium-enriched rice by increasing tillering

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] A preparation method of spherical Se NMs, comprising the following steps:

[0067] (1) Weigh 0.11 g of selenium dioxide and 0.36 g of ascorbic acid, the molar ratio of the two is 1:2, put into a mortar, after mixing, fully grind at 20 ° C for 1-10 min, until red paste;

[0068] (2) adding 20 mL of deionized water to the red paste obtained by grinding in step (1) to disperse;

[0069] (3) Pour the solution obtained in step (2) into a container, add 47 mg of polyvinylpyrrolidone (PVP) to it, carry out 20°C, 300W ultrasonic treatment for 60min, and centrifuge at 4°C at 10000r / min after the treatment is completed, and the resulting precipitate Freeze-drying was performed to finally obtain spherical Se NMs.

[0070] The performance of the obtained spherical Se NMs is tested, and the test results are shown in Table 1:

[0071] Table 1 Characterization of spherical Se NMs

[0072] particle size Hydration radius charge purity 60nm 180nm -16.6mV 99% ...

Embodiment 2

[0074] A method for increasing tiller to improve the yield of selenium-enriched rice, comprising the steps of:

[0075] (1) growing the rice seeds from the Jiangsu Academy of Agricultural Sciences in the seedling base;

[0076] (2) The rice seedlings in the period of "two leaves and one heart" are selected by machine transplanting and transplanted in standard rice fields (the planting density is 10,000 seeds per mu);

[0077] (3) Cultivate for 10 days to reach the period of "three leaves and one heart", spray 1.5mg / L of the spherical Se NMs aqueous solution of Example 1 on the foliar surface, continue to cultivate for 140 days, and harvest the rice; wherein the spraying amount is 1mL / plant .

Embodiment 3

[0103] Referring to the synthesis method of spherical Se NMs in patent CN112010271A, adjusting the particle size of spherical Se NMs in Example 1 to 10 nm, 40 nm, 100 nm and 200 nm, and keeping the others consistent with those in Example 2, rice was obtained.

[0104] The obtained rice was tested, and the test results were as follows:

[0105] The test result of table 3 embodiment 3

[0106]

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PUM

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Abstract

The invention discloses a method for increasing the yield of selenium-enriched rice by increasing tillering, and belongs to the technical field of nano agriculture. The method comprises the following steps: applying a spherical Se NMs solution to leaf surfaces in a rice seedling stage; wherein the size of the spherical Se NMs ranges from 10 nm to 90 nm, the hydration radius ranges from 160 nm to 200 nm, the surface charge ranges from-15 mV to-18 mV, and the purity is 95% or above; the rice seedling stage refers to the three-leaf and one-core stage of rice; the spherical Se NMs solution is a spherical Se NMs aqueous solution, and the concentration of the spherical Se NMs aqueous solution is 1-3 mg / L. By means of the method, the rhizosphere microflora of the rice can be remarkably improved, root exudates can be increased, the soil environment is changed, and absorption of root nutrients is promoted; the Se content in the rice is obviously improved; the synthesis of gibberellin in rice can be regulated and controlled, and the upper expression of tillering genes is increased; the tiller number of rice plants is obviously increased; the yield is increased.

Description

technical field [0001] The invention relates to a method for increasing the yield of selenium-enriched rice by increasing tillers, and belongs to the technical field of nano-agriculture. Background technique [0002] Selenium (Se) is a constituent element of glutathione peroxidase in the human body and an important component to maintain the activities of various enzymes. It has the functions of anti-oxidation, anti-cancer and improving immunity in the human body. Food-based Se supplementation is one of the main measures to meet the human body's Se supply. [0003] Se-rich rice is currently one of the main ways of human Se intake, and its economic value is 1 to 5 times higher than that of ordinary rice. At present, the main way to produce Se-rich rice is to apply Se fertilizers in the soil, mainly sodium selenate and sodium selenite, etc. However, the utilization efficiency of these traditional Se fertilizers is less than 20%, and a large amount of Se fertilizers remain, ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G22/22A01C21/00
CPCA01G22/22A01C21/005Y02A40/10
Inventor 王震宇王传洗乐乐曹雪松
Owner JIANGNAN UNIV
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