Vegetable seed longevity
Vegetable seeds refers to under certain conditions, the life of a seed from full time experienced by mature to the loss of life force.When a group of seed germination rate dropped to 50% or so, from after harvest to half of the seed survival time is experienced by the life of the seed groups.
Vegetable seed longevity difference is very big.Its lifespan depends mainly on genetic characteristics of plant itself, but also on seed formation, mature process with different phases such as dormant storage conditions.All factors in the process of seeds can affect the metabolism, such as climate, soil, water, fertilizer, plant diseases and insect pests, harvest, the dry degree of seed and storage conditions, etc., can be directly or indirectly affect the physiology of seed and life.
Closely associated with vegetable production is the life of vegetable seed groups.When the germination rate of seeds group drop below 50%, even if the germination performance is normal, but real life force has a recession, should not be as production use.
New Chen seed identification
Strong vitality, new seeds germinate fast, seedling strong, easy to yield.Chen seed as the storage time is too long, because of the influence of the environment, Chen seed germination and seedling growth potential are poor, not suitable for seed production.
Difference method mainly adopts see, smell, rub, four kinds of methods to test
A look at: the color of seed, brightness, vividness, and so on.New seeds commonly bright color, seed coat smooth, shiny, Chen seeds dark, though without burnish.
Smell: smell the smell of the seeds.General new seeds smells, Chen have different degree of musty seeds.
Three rub: seeds by hand rub.New seeds not easily broken, Chen seed easy peeling and cracking.
Four immersion: water soaking seeds.New seeds soaked with water shallow, the qing dynasty, Chen seeds soaked with water depth and turbidity.
The main characteristics of the new common vegetables, Chen seeds
1, cruciferous vegetables.In color with a glossy skin smooth, new seeds, grain is relatively strong;A handful seeds smell, smell of a fragrance;With her nails weighed or put the seeds in the table, with the hand palm rub moves back and forth a bit hard after a few times, seed coat is hard to release, knead sticky with the hand, show green or yellow.
Chen seed surface dull dull, sometimes on the skin with the florescence, remove the smell, oil, taste, slightly less oil content;With her nails weighed, cotyledon fragile, seed coat is easy to separate seed release after the yellow or the old yellow inside.
2, umbelliferae.Coriander seed epidermis in black or yellow is Chen, green as the new seeds, another new seeds without population in general.Aromatic flavour thick celery seed is a new seeds, aromatic taste bland or boring is Chen seeds.
3, solanaceae vegetables.New seeds show part that commonly, luster, while Chen seeds for yellow or yellow.New seeds chili spicy is thicker, Chen has a musty seeds taste light even.
4, leguminous vegetables.His new seeds, full, rich in oil, aromatic, mouth bite astringency, cotyledons have obvious green;Seed mouth bite no acerbity, Chen can't smell aroma, cotyledons have deep yellow markings.
5, liliaceous vegetables.With saliva wetting after careful observation, grain surface has a small white core for the new seeds, no white core for Chen seed.
6, cucurbitaceae vegetables.New seed skin luster, and satiny, is rich in oil, mouth bite astringency, aromatic smell;Chen seed skin dull, sometimes appears the macula, chewed with oil to taste.
