The rapid and accurate identification of watermelon seeds is a highly desirable technique both in watermelon production and in seed business. The method of accurately identifying watermelon seed mainly includes sensory identification, chemical identification and germination test. (1) Sensory identification: It is through the identification of the color, smoothness, smell, and seed characteristics of watermelon seeds. All new seeds generally have the inherent color of the species, and the seed coat has a glial substance and often adheres to a very thin white film; the seeds are glossy and have aroma. All Chen seeds, generally the seed coat color darkens, dull; testicle surface often has yellow spots or moldy material, the cuticle shrinks, the seed coat becomes rough; the umbilical part (seed mouth) wavy lines deepen; insert the hand into the seed The inside feels coarse and slippery; the kernels are gray or white (waxy), unscented or even mildewy. (2) Chemical identification: Due to the respiration of the seed, the drug undergoes a reduction reaction, thereby changing the color of the original seed kernel. The use of these drugs to change the length of color can identify new seeds. For example, watermelon seed is soaked with a chemical reagent (tetrazenium salt) (2,3,5-trichlorotetrazole) for 5 hours and the degree of discoloration (redness) of the seed kernel is observed. This method is also called staining. law. Dyeing method used to identify the new degree of the seed is more accurate than the sensory identification, but it takes longer, faster than the germination test, and the accuracy is not as good as the germination test. (3) Germination test: The germination test using the germination method can very accurately identify the fresh seeds of watermelon seeds. According to the seed germination rate, you can identify new seed. According to tests, under normal storage conditions, seed watermelon seeds have a storage period of less than one year, and the germination rate can be maintained at 95%-100%; for 2-3 years, the germination rate is 80%-95%; storage is 4-5 In 2003, the germination rate was 30% to 40%; after 6 years of storage, the germination rate was extremely low and even completely lost the ability to germinate. The use of germination tests to identify new seeds of watermelon seeds is very accurate, but it is more troublesome than sensory identification and chemical identification and requires more seeds to be consumed. Therefore, it is suitable for seeds with abundant seed sources and low prices, and is not suitable for rare and precious varieties.
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