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2025-02-25
The glossiness of cucumber peel can greatly affect the marketability of the fruit and is a very important economic trait. Fruits with a glossy luster can usually improve their marketability, influence consumers' consumption psychology, and are loved by consumers. This article introduces the factors and measurement methods of cucumber peel glossiness.
cucumber
The glossiness of cucumber peel is not only controlled by genes, but also easily affected by factors such as wax powder, wax quality, environmental conditions, nutritional conditions and grafted rootstock.
1. The influence of wax powder
When light hits the surface of an object, part of it will be absorbed by the object, and part of it will be reflected, scattered, and refracted. The smaller the roughness of the surface of the object, the more light will be reflected and the stronger the glossiness. On the contrary, if the surface of the object is uneven, more light will be scattered, resulting in a decrease in glossiness. Wax powder is a particle covering the surface of the peel, which will affect the reflection of light by the peel and thus affect the glossiness of the peel.
2. Effect of wax
Plant epidermal wax is an important structure of the epidermis, covering the surface of organs, and is mainly composed of extra-long chain fatty acids and their derivatives (alcohols, aldehydes and esters, etc.) and other steroids, flavonoids and trace secondary metabolites. The wax on the outer surface of cucumber peel can affect light reflection, and the content and composition of wax will affect the glossiness.
3. Impact of environmental conditions
The glossiness of cucumber peel is related to environmental factors. The environment can affect the glossiness by affecting the generation of wax powder and the synthesis of wax. The synthesis of wax is affected by light intensity and humidity. The increase in wax synthesis will increase the reflective efficiency, thereby enhancing the glossiness. In addition, smoke, dust, and ash in the environment will also cause fruit surface pollution, thus affecting the glossiness of the peel.
4. Influence of nutritional conditions
The normal growth and development of cucumbers requires appropriate macroelements and trace elements such as nitrogen, phosphorus, and potassium. The appropriate ratio of elements can ensure sufficient supply of nutrients and increase the quality of the fruit. Appropriate application of organic fertilizers, such as nitrogen, phosphorus, and potassium, can make the cuticle of cucumber peel cells thicker, bright and transparent, and bright in color.
5. The influence of grafted rootstock
Grafting significantly affects the amount of wax powder, which is closely related to the grafted rootstock. The degree of wax powder in cucumbers grafted with different rootstocks varies greatly. Wax powder covering the surface of the peel will affect the reflection of the peel to light, thereby affecting the gloss of the peel.
Gloss meter
Cucumber fruit quality includes commodity quality, flavor quality and nutritional quality. Commodity quality mainly refers to appearance quality such as shape, color, size, defects, etc. Flavor quality mainly refers to hardness, toughness, tightness, bitterness, flavor, etc. Nutritional quality mainly includes soluble solids, Vc and mineral content. The quality traits usually referred to mainly refer to commodity quality: including melon length, melon thickness, handle length, peel color, flesh color, fruit thorns, fruit tumors, glossiness, etc. With the improvement of consumption level, people pay more and more attention to the quality of cucumbers, especially commodity quality, and the genetic laws and gene positioning research of commodity quality traits are increasingly valued by breeders. Among them, cucumbers with glossy fruits are loved by consumers because of their good commodity properties, and they have also attracted the attention of more and more breeders. Therefore, in order to accurately measure the glossiness of cucumber peel, a gloss meter can be used.
There are many ways to evaluate the surface gloss of different materials, which mainly depends on the different lighting sources and observation angles. Instrument measurement can usually use 20°, 45°, 60° or 85° angles for illumination and detection signals. Different materials are often measured at different angles. The larger the angle, the more suitable it is for detecting materials with smaller gloss values. Here we recommend the use of the Sannshi NHG60° angle gloss meter, which is suitable for the determination of low-gloss to medium-gloss materials. Its technical parameters meet the national standards (GB9754, and international standards (ISO2813), and various performance indicators meet the requirements of the first-level working machine of the national JJG696 (mirror gloss meter metrology and verification procedures).
When measuring the glossiness of cucumber peel, turn on the instrument and place it in the center of the gloss standard plate for calibration. After calibration, expose it to natural light at an angle of 60°, and the display will show the corresponding glossiness value. Randomly cut parts of each cucumber variety for testing 5 times, take the average value, and perform statistical analysis.
It should be noted that the instrument should be kept away from strong direct light during use, otherwise it will affect the measurement accuracy. The standard plate provided with the instrument should be kept clean. Do not touch the surface with your fingers. If there are stains on the surface, it will cause the instrument error to increase and the reading to be inaccurate. You can wipe it with lens paper or anhydrous ethanol.
