Seed clarity analysis

Seed clarity analysis

The key to the clarity analysis is to distinguish net seeds, other plant seeds, and inanimate impurities. Net Seed: Net Seed refers to the species described by the applicant or the major species discovered during the survey and includes all varieties and varieties of the species. Seeds with the following structures, i.e., immature, thin, wrinkled, diseased, or overgrowth, should be identified as the species to be analyzed and should be treated as net seeds but have become sclerotia Except for smut group or worms. 1. Complete seed units: including achenes, similar fruits, fruit and florets. There is an obvious caryopsis in the small flowers of grasses, which contain endosperm or naked caryopsis are net seeds for the complete seed unit. 2. Damaged seed units larger than half the original size are included in the net seed. 3. The ryegrass, fescue and icegrass in the forage grasses contain a caryopsis floret, and the caryopsis is measured from the base of the rachis axis and is equal to or greater than the net seed of the inner scale. However, a flower containing one caryopsis and the length of the caryopsis less than 1/3 of the length of the inner scale is innocuous. Other plant seeds: Other plant seeds include seed units of any plant species other than net seeds, other crops, other pastures, and weed seeds. Such as the purple foxtail seed in the first. 3. Inanimate impurities: Inanimate impurities include the following seed units, other impurities, and plant structures other than net seeds and other plant seeds: Seed units that are clearly free of seeds; grasses such as ryegrass, fescue, and ice Grass Ying; The fruit has not reached the florets with a length of 1/3 of the internal scale; The broken seeds are less than or equal to half the original size; Fragments of the unit. Seeds of leguminous and cruciferous families with fully exfoliated seed coats; those belonging to net seeds that do not refer to net seed are not mentioned in the net seed definition; sterile flowers, glumes, internal and external scales, scale shells, stems, and leaves removed , Cone scales, fruit wings, bark fragments, flowers, nematodes lean, fungal body (ergot, sclerotia, smut group), soil, sand, gravel, and other non-seed materials; All substances remaining in the light fraction (except for other plant seeds) when the separation was performed.

Seed clarity analysis occupies a very important position in the identification of seed quality. The key to the clarity analysis is to distinguish net seeds, other plant seeds and impurities. Usually we have specific instruments for the analysis of seed clarity, such as the primary clarity. Analysis, we can use the seed blower, which uses the different particle floating speed in the air to classify the seed, sometimes called the seed wind analyzer. Then a more meticulous analysis of the degree of clarity will rely on the Seed Cleanness Workbench. The degree of seed's netity can only be put on the market if it reaches a certain standard. With the constant acceleration of international processes in recent years, China's seed standards have become more stringent, and the requirements for seed purity, seed weight, and seed germination rate have become increasingly stringent.