| Popis: |
The purpose. Establish the regularities of the ecogenetic process of sudden renewal of zonally adapted and economically valuable grassland herbaceous ecological-biological systems with high self-repair ability and develop effective ways to accelerate their formation. Methods. Field, laboratory, functional-group methods analysis of grassy ecosystems. Results. The results of many years of fundamental research on the study of ecogenetic reproduction processes are highlighted on the former arable lands of zonally-adapted grassy ecological-biological systems with high self-repair ability and effective ways to accelerate their formation and improving their economic value. Conclusions. Spontaneous re-establishment of meadow lands on the former plowing lands is the cheapest, but long in time (10 – 15 years) and in the first 3 – 5 years at high weediness provides feed low quality. Starting crop of bean-cereal mixture eliminates the weed phase development of cenoses and provides on the background of no fertilizers in the first 3 years in 3.7, and on average for 10 years 2.3 times higher yield and significantly improves the quality of the feed compared with spontaneous re-establishment. Sowing at the initial stage of seed of wild species of grasses of local flora for 5 – 7 years accelerates the formation of stable and zonally adapted herbages with high self-healing ability. |
