Principles of Seed Multiplicatipn.
2009
Khazaei, Hadi | Khaksar, Hadi | Hamidi, Aydin
Any part of a plant that can generate a new plant is called seed. Since seed is expensive and destructable, its quality must be controlled prior to sowing. Seed quality consists of genetical, physiological, physical quality and seed health.Offtype contamination is the most threat to genetical quality. It can be just controlled only by field inspection. However certain laboratory methods are introduced for this purpose. To determinate physiologycal quality of seed, standard germination test is carried out. In this test seed ability to produce normal seedling is evaluated. However seedling ability to on time sproute and establishment could not be evaluated in this test. Therefore vigor tests are applied. The most seed physical quality aspect is purity or pure seed percent that is determined by purity test. Seed health is another seed quality criteria. Nowaday disinfection with fungicides is the most conventional method to insure seed health. Proper management in seed production fields during sowing, growing season and harvesting stages compensate high costs of seed multiplication. Seed processing is practiced increase seed physical quality as well as physiological quality protection. It includs drying, impurities deletion, uniforming seedsize and seed peleting. After reducing seed moisture content up to at least 9 percent, and seed dressing with fungicide, seed lots must be packed. Important point in seed storage are physical purity protection, prevention of anytype of contamination and seed lots physiologycal quality protection. Store condition must be dry and cold, also sprayed by pesticide. Seed must be classified to seed lots and set apart.
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