Chitosan oligosaccharide composite with cold-resistant function and application of composite

A technology of chitosan oligosaccharide and composition, which is applied in the agricultural field, can solve problems such as unreported research on cold resistance, and achieve the effects of protecting normal growth and development, being easy to popularize and use, and promoting metabolism.

Active Publication Date: 2011-08-10
HAINAN ZHENGYE ZHONGNONG HIGH TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Chitosan oligosaccharides have been reported on stress resistance, freshness preservation, growth promotion, and disease prevention, but no research has been reported on the combination of chitosan and other cold-resistant substances to induce plant cold resistance

Method used

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  • Chitosan oligosaccharide composite with cold-resistant function and application of composite
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  • Chitosan oligosaccharide composite with cold-resistant function and application of composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Experiment of anti-cold agent 1 on chilling injury of papaya

[0017] (1) Material

[0018] Location: Papaya Base, Fushan Town, Chengmai County, Hainan Province

[0019] (2) Method

[0020] Treatment 1: Dilute with 7.5% chitosan oligosaccharide + 92.5% water and add water 1000 times before spraying 3 times before cold damage.

[0021] Treatment 2: CK (orchard conventional chemical treatment)

[0022] Spray 3 times before the cold damage comes, and spray once every 7 days. Count the number of flowers and fruits.

[0023] The average number of flowers per plant of Chinese papaya after spraying for 13 times (flowers)

[0024]

[0025] The average number of fruits per plant of papaya after table 23 spraying

[0026]

[0027] In a low temperature environment, after treatment with this product, the fruiting rate is promoted, so that the fruiting number of papaya in the later stage is significantly more than that of the blank CK (control). It is beneficial to resi...

Embodiment 2

[0029] Experiment of Anti-cold Agent 2 on Banana Chilling Injury

[0030] (1) Material

[0031] Location: Guangzhou Fruit Tree Institute, Guangdong

[0032] Crops: Bananas

[0033] (2) method

[0034] Anti-cold agent 2 composition: 5% chitosan oligosaccharide + 1% salicylic acid + 2% boric acid + 2% zinc sulfate + 1% ammonium molybdate + 89% water

[0035] 7-10 days before encountering low temperature at the banana seedling stage, or during the low temperature period, apply the anti-cold agent of the present invention and dilute 1000 times with water to carry out 2 foliar spray treatments on banana seedlings, and treat with clear water as CK (contrast). Carry out classification and statistics of cold damage.

[0036] Leaf chilling damage classification:

[0037] Level O: no symptoms of damage;

[0038] Grade 1: The leaves are slightly damaged, and the leaf margins turn yellow;

[0039] Grade 2: Dehydration spots appear on a small part of the leaves;

[0040] Grade 3: D...

Embodiment 3

[0050] Experiment of anti-cold agent 3 under cold injury of cucumber

[0051] (1) Material

[0052] Location: Laboratory of Hainan Biopesticide Engineering Research Center

[0053] Crop: Cucumber

[0054] (2) Method

[0055] Anti-cold agent 3 composition: 5% chitosan oligosaccharide + 10% potassium dihydrogen phosphate + 3% calcium chloride + 2% boric acid + 80% water

[0056] In the cucumber seedling stage, move indoors to slow down the seedlings, and after the cucumbers adapt to the indoor environment, use this product cold-resistant agent 3 diluted 1000 times with water to spray on the leaves. 5 days after spraying, the cucumber seedlings of each treatment were put into a light incubator at 6° C. for 6 hours, and then the freezing degree of the crops was observed.

[0057] Leaf chilling damage classification:

[0058] Level O: no symptoms of damage;

[0059] Level 1: The leaves are slightly damaged, and the leaf margins turn yellow and wilt;

[0060] Grade 2: Dehydra...

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Abstract

The invention discloses a chitosan oligosaccharide composite with cold-resistant function, which is aqueous solution, wherein the mass concentration of the chitosan oligosaccharide is 5%-10%, other auxiliary active constituents include at least one of phosphorus, potassium, calcium, boron, molybdenum, zinc, salicylic acid and betaine, and the content of the auxiliary active constituents is 0.5%-30% of the total mass concentration of the composite. Before the flowering period and the young fruit period of fruit trees, the time of young seedling of melon and fruit, vegetables and flowers, and the cold sensitive period of the winter growth of greenhouse crops, the composite is diluted by 1000 times with water to be sprayed on the leaves of the plants for 2-3 times; the chitosan oligosaccharide composite used in the invention has the function of promoting photosynthesis of the crops, improving activation performance of various enzymes and promoting metabolism of carbohydrates; and the chitosan oligosaccharide composite is used for inducing the crops to improve stress resistance and inducing the crops to improve cold resistance, so that the crops can get through the low-temperature cold harmful period, and regular development and yield of the crops are ensured.

Description

technical field [0001] The invention relates to the field of agriculture, and more specifically relates to the application of chitosan oligosaccharides on vegetables, fruit trees and other crops to resist low temperature and cold damage. Background technique [0002] Temperature is an environmental factor necessary for plant growth and development, and the main limiting factor for plant morphology and natural geographical distribution. It affects all processes of plant growth and development. Plants have a temperature range suitable for their growth, growth and development. Beyond this range will limit the growth of plants, affect the development of plants, cause damage to plants themselves, and even cause plant death. [0003] In 2008, a low-temperature rain, snow and freezing disaster caused huge losses to my country's agriculture. The area affected by the disaster involved 21 provinces, and the affected area of ​​crops exceeded 130 million mu, of which more than 30 milli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/26A01N59/16A01N59/14A01N59/08A01N43/16A01N37/40A01P21/00A01G7/06
Inventor 张善学蓝亿亿陆红霞肖斌马旭东徐俊光
Owner HAINAN ZHENGYE ZHONGNONG HIGH TECH
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