Anti-cracking preservative used before picking of litchis and preparation method and application thereof

A kind of antistaling agent and technology of lychee, which is applied in the field of anti-cracking antistaling agent and its preparation before lychee harvesting, can solve the problems such as failure to fundamentally solve the problem of lychee preservation, achieve good anti-cracking effect, easy operation conditions, and good freshness effect Effect

Active Publication Date: 2016-06-15
POMOLOGY RES INST GUANGDONG ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

All of the above methods have a certain effect, but they are all defensive treatments from the post-harvest stage, failing to fundamentally solve the fresh-keeping problem of litchi; ,

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Taking 'Nuomi Ci' as an example, weigh the lychee preharvest anti-cracking preservative according to the following weight (kg) composition ratio, dissolve 50g salicylic acid, 50g calcium nitrate, and 2.5g potassium sorbate in water, and use a mass concentration of Dissolve 25g of chitosan in 1% citric acid (the degree of deacetylation is 95%), dissolve 0.1g of methyl jasmonate and 2.5g of gibberellin in ethanol respectively; mix the components; then add 250g of Tween 80, add water Until the obtained mixture is 50L; Stir at 500 rpm for 10 minutes to emulsify under normal pressure; then homogenize under high pressure at 50°C and 90MPa, vacuum degas at a vacuum of 0.05MPa and then fill it to obtain pre-harvest litchi Anti-crack preservative.

[0043]Methyl jasmonate 0.002g / L

[0044] Salicylic acid 1g / L

[0045] Chitosan (deacetylation degree 95%) 0.5g / L

[0046] Gibberellin 0.05g / L

[0047] Calcium nitrate 1g / L

[0048] Tween 805g / L

[0049] Potassium sorbate 0.05g / ...

Embodiment 2

[0054] Taking 'Guiwei' as an example, weigh the lychee preharvest anti-cracking preservative according to the following weight (kg) composition ratio, dissolve 0.5g salicylic acid, 500g amino acid chelated calcium, and 5g potassium sorbate in water, and use the mass Dissolve 500g of chitosan (95% degree of deacetylation) in citric acid with a concentration of 1%, dissolve 5g of methyl jasmonate and 5g of gibberellin in ethanol; mix the components; then add 2500g of Tween 80, add water Until the obtained mixed solution is 50L; Stir at 50 rpm for 30 minutes to emulsify under normal pressure; then homogenize under high pressure at 50°C and 20MPa, vacuum degas at a vacuum of 0.1MPa and then fill it to obtain pre-harvest litchi Anti-crack preservative.

[0055] Methyl jasmonate 0.1g / L

[0056] Salicylic acid 0.01g / L

[0057] Chitosan (deacetylation degree 95%) 10g / L

[0058] Gibberellin 0.1g / L

[0059] Amino acid chelated calcium 10g / L

[0060] Tween 8050g / L

[0061] Potassiu...

Embodiment 3

[0066] Taking 'Nuomi Ci' as an example, weigh the lychee preharvest anti-cracking preservative according to the following weight (kg) composition ratio, and dissolve 5g salicylic acid, 50g chitosan oligosaccharide (molecular weight: 5000Da), 100g calcium nitrate, 4g potassium sorbate, dissolve 1g methyl jasmonate and 1g gibberellin in ethanol; mix the components; then add 500g Tween 80, add water until the resulting mixture is 50L; stir at 500 rpm for 10 minutes Carry out emulsification under normal pressure; then homogenize under high pressure at 60°C and 30 MPa, vacuum degas at a vacuum degree of 0.05 MPa, and then fill it to obtain the anti-cracking antistaling agent for litchi before harvesting.

[0067] Methyl jasmonate 0.02g / L

[0068] Salicylic acid 0.1g / L

[0069] Chitooligosaccharide (molecular weight is 5000) 1g / L

[0070] Gibberellin 0.02g / L

[0071] Calcium nitrate 2g / L

[0072] Tween 8010g / L

[0073] Potassium sorbate 0.08g / L

[0074] (1) 5 weeks, 7 weeks, 8...

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Abstract

The invention discloses an anti-cracking preservative used before picking of litchis and a preparation method and application thereof. The anti-cracking preservative is prepared from jasmonic acid or jasmonic acid derivative, salicylic acid, chitosan oligosaccharide or/and chitosan, gibberellin, tween 80 or/and sodium dodecyl benzene sulfonate, calcium salt and preservative. The specific application method comprises the following steps: respectively applying the anti-cracking preservative disclosed by the invention in the expansion period, the turning stage and the mature period of the litchis for 3 to 4 times in total once every 7-10 days; uniformly applying the preservative in an atomizing manner to fruits and leaves before 10 a.m. or after 4 p.m. in sunny days until liquid drops fall down; and stopping applying the preservative 7-10 days prior to harvesting. By the application of the anti-cracking preservative, the cracking resistance, cold resistance, disease resistance and storage resistance of the litchis can be improved, and the freshness retention period is prolonged; treated fruits can be stored for more than 8 days under a normal temperature condition and more than 30 days under a low temperature condition; and the cracking rate is low, and is only 50 percent of that of contrast fruits.

Description

technical field [0001] The invention relates to the technical field of cultivation and fresh-keeping of agricultural products, in particular to a pre-harvest anti-cracking and fresh-keeping agent for lychees, a preparation method and application thereof. Background technique [0002] Litchi (Lichi Chinensis Sonn.) belongs to Sapindaceae plant, is the famous characteristic fruit of our country, because of its unique flavor, delicious and juicy, nutritious, and the title of " treasure in the fruit ". my country's lychee has great industrial advantages, and it is also the main means for fruit farmers to earn a living. It is also in the high temperature and rainy season, and the fruit is prone to cracking before ripening. The color and fragrance of the fruit will gradually lose within a few days after picking, and the freshness will decrease, and it will cause browning, mold and rot, which makes the storage life of litchi extremely short, seriously affecting its production, econo...

Claims

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Application Information

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IPC IPC(8): A01N43/16A01N37/42A01N37/40A01N43/12A01P21/00A01G7/06
CPCA01G7/06A01N37/40A01N37/42A01N43/12A01N43/16A01N2300/00
Inventor 蒋侬辉向旭钟云邱艳萍刘伟
Owner POMOLOGY RES INST GUANGDONG ACADEMY OF AGRI SCI
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