Many species of Leguminosae(50 cell seedling trays wholesale), such as Acacia, Amorpha fruticosa and Lespedeza, can be pricked near the radicle, or part of the testa can be cut off, but not the embryo. In order to make the tetrazolium solution even and impervious to seeds, such as Ligustrum, the seeds can be cut off by 1 / 3 at the opposite wide end of the radicle after no seeds are planted(3.54inch plastic plant pots). The seed samples for water content determination must be packed in moisture-proof containers.
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In addition, at the end of germination, cutting method is usually used to determine the excellent degree of the non germinated seeds as a supplementary identification(51 cell propagation trays wholesale), so as to judge whether there is the state of embryo, endosperm or cotyledons, whether there is corruption and insect damage, etc. The disadvantage is that the seed of the intermediate state between good and bad needs to be judged by experience(plastic plant pots wholesale). The testa is hard and hard to open.
(cheapest plastic plant pots wholesale price guatemala)Sample extraction take 100 samples (50 or 25 seeds with large seed nucleus) from the pure seeds after purity determination by quartering method, as one repetition, take 4 repeats in total(104 cell propagation trays wholesale). The excellent seeds have the following sensory manifestations: full seeds, normal development of embryo and endosperm, and unique color, elasticity and smell of fresh seeds of the tree species(3.94inch plastic plant pots). The excellent degree can explain the probability of seed germination.
The determination method of the excellent degree adopts the help method(128 cell plug trays supplier), which needs the tools of dissecting knife, dissecting labor, silver, hammer, magnifying glass, glass, aluminum box, slide and so on. During the determination, observe the external conditions of the tested seeds first, then cut them one by one, observe the internal conditions of the seeds(succulent plug trays), and distinguish the excellent seeds from the inferior ones.(cheapest plastic plant pots wholesale price guatemala)
It is suitable to determine the quality of seeds as soon as possible when they are purchased, so as to determine the use value and price of seeds(40 cell plug tray wholesale). The determination shall be started as soon as the seed sample is received. The seed can be soaked before determination to soften the seed coat. The seeds of the genus Pewter can be cut with a knife on each side, but do not damage the embryo(plastic seedling trays). It is an auxiliary method to judge the degree of desiccation and wetness of seeds by senses.
The seeds of Pinus were cut longitudinally parallel to the longitudinal axis of the embryo, but could not pass through the embryo(2.5inch square nursery pots). In order to ensure the safety of seeds during storage and transportation, the water content of seeds must be limited within a certain range. Therefore, seed water content is one of the important indexes of seed quality(plug flats wholesale). The minimum weight of the sample for water content determination is 50g, and the large seeds need to be sliced into 100g.
(cheapest plastic plant pots wholesale price guatemala)Water content of seed refers to the percentage of water content of seed and seed weight(3.5inch square nursery pots). In order to ensure the safe storage of seeds, the water content of seeds must be measured before the purchase, storage and transportation of seeds and during the storage period. The water content of seeds shall be calculated according to the following formula to 1 decimal place(plastic succulent pots). The simple method of judging the degree of desiccation and wetness of seeds.