Use of chitosan oligosaccharide and composition thereof in crop growth restoration after frost damage

A composition and technology of chitosan oligosaccharides, applied in the field of agricultural chemicals, can solve problems such as difficult recovery of crops, and achieve the effect of avoiding large-scale death

Active Publication Date: 2014-05-21
HAINAN ZHENGYE ZHONGNONG HIGH TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Whether the chitosan oligosaccharide composition can restore the crop damage caused by frost damage has not been reported in the prior art, but the present invention unexpectedly finds that the chitosan oligosaccharide composition can solve the difficult problem that frost damage crops are difficult to recover

Method used

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  • Use of chitosan oligosaccharide and composition thereof in crop growth restoration after frost damage
  • Use of chitosan oligosaccharide and composition thereof in crop growth restoration after frost damage
  • Use of chitosan oligosaccharide and composition thereof in crop growth restoration after frost damage

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Experimental program
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Effect test

Embodiment 1

[0029] Embodiment 1 Chitosan oligosaccharide composition restores to rice frost damage

[0030] The artificial intelligence frost box is used to simulate the frost damage process of early frost and late frost in nature, and the frost damage treatment is carried out on rice, and the frost damage treatment is carried out on the growth of rice seedlings and the filling stage of rice respectively. , the frost damage that occurs in one night when the temperature is lower than -5°C is heavy frost damage, and the frost damage that occurs in one night when the average temperature is lower than -1°C or within one hour at -5°C is light frost damage. After artificially adjusting the frost damage conditions, the crops were subjected to frost damage stress treatment. The next day after the frost damage occurred, spray the chitosan oligosaccharide solution for the first time, and dilute the chitosan oligosaccharide aqueous solution with a mass concentration of 5% to 50-200ppm to spray the w...

Embodiment 2

[0045] Embodiment 2 The recovery of chitosan oligosaccharides to cotton frost damage

[0046] In Xinjiang in 2010, the cotton that had been damaged by frost in early autumn was sprayed with oligochitosan, foliar fertilizer and water respectively on the second day. After treatment, the cotton sprayed with 70ppm oligochitosan gradually recovered after 5 days. The leaves of cotton sprayed with foliar fertilizer and water did not recover after frost damage and began to wither and turn yellow. Finally, comparing the cotton yield, the yield of frost-damaged cotton is basically the same as that of previous years after being treated with chitosan oligosaccharides, which is 60-80% higher than that of cotton treated with foliar fertilizer and clear water. Cotton after frost damage, after applying chitosan oligosaccharide, the cotton can quickly resume growth, continue to bloom and bear fruit, and the impact on cotton is very low.

[0047] After the cotton was damaged by frost, 70ppm of...

Embodiment 3

[0048] Embodiment 3 The impact of chitosan oligosaccharides on apple frost damage

[0049] 1. Detection of anti-frost ability of apple trees sprayed with chitosan oligosaccharide solution in the whole process

[0050] Apple germination begins to spray the chitosan oligosaccharide solution for the first time, and the concentration is 40ppm, and then sprays the chitosan oligosaccharide solution of 60ppm twice in the growth period, with an interval of 10 days. After frost damage occurred in early autumn, the yield of apples was 17.8% higher than that of spraying chitosan oligosaccharide solution. It can be seen that chitosan oligosaccharide has obvious effect on the improvement of the frost damage resistance of apples.

[0051] 2, after frost damage occurs in apple, spray 120ppm oligochitosan on the 1st day after frost damage, count the output, the output of frost damage apples processed by oligochitosan is 9.3% higher than the output of apples without spraying oligochitosan, it ...

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Abstract

The invention relates to use of chitosan oligosaccharide and its composition in crop growth restoration after frost damage, and specificallyprovides the use of a pesticide composition comprisingchitosan oligosaccharide for crops to resist frost. The use provided by the invention is characterized in that the pesticide composition comprises 0.0035% to 0.23% by weight of chitosan oligosaccharide. The use anda method of chitosan oligosaccharide to restore crop growth after frost or freeze damage provided by the invention solve the problem that at present there is no effective measure for restoring crop growth after frost or freeze damage, playing an important role in reducing the effect of natural disasters on crops.

Description

technical field [0001] The invention belongs to the field of agricultural chemicals, and in particular relates to the application of chitosan oligosaccharide in agriculture, in particular to the use of chitosan oligosaccharide and its composition for restoring crop growth after frost damage. Background technique [0002] Frost damage and freezing damage are short-term low temperature damages in which the temperature drops enough to cause injury or death of crop plants. Generally can be divided into two kinds of early frost damage and late frost damage. Usually occurs in spring and autumn. Frost damage in spring is also said to be cold in spring. Late frost damage generally occurs in autumn, so it is also called autumn frost damage. It mainly harms crops with long growth period or late-maturing crops. The degree of crop frost damage is related to the growth stage of the crop and the degree of cold resistance exercise. After the crop seedlings are frozen, the leaves are wa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N43/16A01P21/00A01G7/06A01G13/00
Inventor 张善学陆红霞陈丁丁王会民侯华民董智荣孙诒森
Owner HAINAN ZHENGYE ZHONGNONG HIGH TECH
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