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Application of polysaccharide functionalized nano-selenium to selenium-enriched rice planting

A functional, nano-selenium technology, applied in rice cultivation, etc., can solve the problems of small particle size, time-consuming, complicated operation, etc., and achieve the effect of reducing content, increasing content, and high selenium content

Active Publication Date: 2019-04-09
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The nano-selenium agent prepared by the template method is uniform and stable, and the particle size is small and dispersed. However, different template methods have some disadvantages, such as complicated operation and long time consumption.

Method used

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  • Application of polysaccharide functionalized nano-selenium to selenium-enriched rice planting
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  • Application of polysaccharide functionalized nano-selenium to selenium-enriched rice planting

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Effect test

preparation example Construction

[0054] The preparation method of the polysaccharide functionalized nano-selenium used in the present invention refers to the literature Tianqi Nie, Hualian Wu, KaHing Wong, et al. Facile synthesis of highly uniform selenium nanoparticles using glucose as the reductant and surface decorator to induce cancer cellapoptosis [J]. Journal of Materials Chemistry B,2016,4(13):2351-2358, wherein the polysaccharides are respectively chitosan (Mn=30000), lentinan (Mn=1150) and pachymane (Mn=1000), the prepared polysaccharide Nano-selenium is detected by transmission electron microscopy, and the detection results are shown in Figure 1-3 shown, where figure 1 is the transmission electron microscope image of chitosan nano-selenium, figure 2 It is the transmission electron microscope image of Lentinan nano-selenium, image 3 It is the transmission electron micrograph of the polysaccharide nano-selenium. It can be seen from the results that the three kinds of nano-selenium all have good d...

Embodiment

[0057] 1. Plant rice by spraying rice leaves:

[0058] Plant rice 100m 2 , when the rice grows to the tillering stage (about 35d after transplanting seedlings) and heading flowering stage (about 70d after transplanting seedlings), the method of leaf spraying is used to spray on the front and back of the rice leaves or the front or back of the rice leaves at a concentration of 0.1 g / L polysaccharide-functionalized nano-selenium aqueous solution (including chitosan-functionalized nano-selenium, lentinan-functionalized nano-selenium or pachyphyllan-functionalized nano-selenium), the leaf surface is evenly covered with the solution when spraying, and the rice leaves do not drip , the spraying amount of polysaccharide functionalized nano-selenium is 0.0g / acre, 0.5g / acre, 1.5g / acre, 3.0g / acre each time the leaves are sprayed, and then the normal water and fertilizer management. See Examples 1-6, 11-16, and 21-26 in Table 1 for the specific leaf parts to be sprayed, the types of pol...

Embodiment approach

[0064]

[0065]

[0066] Note: The amount of polysaccharide functionalized nano-selenium added is calculated based on the content of Se.

[0067] 4. Test results

[0068] (1) Analysis of soil heavy metal content and implementation site status

[0069] The content of Cd, Cr, Ni, Pb, Cu, Zn and Se in the original soil was tested and analyzed by ICP (atomic emission spectrometer), and the results are shown in Table 2. The average content of Cd in the test plot is 0.313mg·kg -1 , with reference to the secondary standard for soil environmental quality (GB 15618-1995), the number of soil samples exceeding the standard for Cd in the surface soil is as high as 63.33%, and the exceeding standard is between 1-2 times, which belongs to slight pollution; while Cr, Ni, The content of Pb, Cu and Zn did not exceed the standard; the average content of Se in the soil was 0.466mg·kg -1 , according to the national standard, the content of Se in the soil is greater than 0.4mg·kg -1 It i...

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Abstract

The invention discloses application of polysaccharide functionalized nano-selenium to selenium-enriched rice planting. Polysaccharide functionalized nano-selenium is sprayed on the part of the rice oris sprayed on soil for planting the rice in different planting periods of the selenium-enriched rice, wherein the polysaccharide functionalized nano-selenium comprises one or at least two of chitosannano-selenium, pachymaran nano-selenium and lentinan nano-selenium. The polysaccharide functionalized nano-selenium can increase the selenium content of brown rice and is good for human health. The polysaccharide functionalized nano-selenium can be combined with heavy metal in the brown rice, chaff and straws, so that the heavy metal content of the rice is effectively reduced.

Description

technical field [0001] The invention relates to the application of nano-selenium, in particular to the application of polysaccharide-functionalized nano-selenium in selenium-enriched rice planting. Background technique [0002] Selenium is one of the essential micronutrient elements for humans and animals, and plants are the main food sources for humans and animals to absorb selenium nutrition. Some research results show that rice has a bioaccumulation effect on selenium. Therefore, as a staple food, the selenium content of rice is closely related to the nutritional status of selenium in human body. There have been many reports on increasing the selenium content of plants by applying selenium fertilizers, and there are also applications in production. By spraying selenium fertilizer on the leaves, using the bioaccumulation and transformation of rice, the non-biologically active and highly toxic inorganic selenium is converted into safe, low-toxic, and highly bioavailable ac...

Claims

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Application Information

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IPC IPC(8): A01G22/22
CPCA01G22/22
Inventor 陈填烽赵秋香江海燕陈樑贺利贞
Owner JINAN UNIVERSITY
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