M.A. Starostina
Stavropol Research Institute of Agriculture, Russia, Stavropolsky region, Mikhaylovsk city, Nikonova Str., 49
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Summary. The specific traits of seed reproduction of wild-growing species of plants in relation for restoration of natural herbage by a method of agrosteppes are studied. On the basis of ability to seed reproduction of different species of plants, their viability, energy of germination, it is possible to form structure of agrosteppe grass mixture for restoration of natural herbage. Researches revealed that species of wild-growing plants including a number of families (Poacea, Fabacea, Asteracea, etc.) have the seeds with not equal viability and various biometric parameters (length, weight). Seeds of cereals — Dactylis glomerata, Festuca regeliana keep high viability within 8 months. That proves by their high viability both after collecting (67…77%), and laboratory storage (85…100%). Other fresh-gathered seeds right after collecting fall into superficial rest. The most part of seeds overcame it and showed high viability and energy of germination: cereals, consisting of basis of herbage — Bromopsis inermis, Dactylis glomerata, Festuca regeliana (85…100 and 81…100% accordingly), and also species of other families — Centaurea orientalis, Linum nervosum, Onobrychis arenaria, Plantago media, Poterium polygamum (77…94 and 74…94% accordingly). Other seeds of wild-growing species of plants had satisfactory viability (15…30%) or absolutely low (4…9%) and energy of germination (2…26 and 1…2% accordingly). Despite these species of plants with low germination aren’t a basis of agrosteppe grass mixture, their presence in herbage has important protection and economic value. As a whole, the majority of species of wild-growing plants showed ability to give normal shoots and have high adaptive abilities of seeds in herbage and can be used for forming a basis of steppe herbage for its reconstruction by the method of agrosteppes.
Keywords: biodiversity, viability, wild-growing types, natural communities, seed reproduction, energy of germination.