THE RESULTS OF PRODUCTIVITY STUDY OF DIFFERENT SAMPLES OF ALFALFA CHANGEABLE (MEDICAGO VARIA MARTYN) IN THE CONDITIONS OF THE MIDDLE VOLGA REGION
The aim of the research was to increased fodder and seed productivity of variable alfalfa (Medicago varia Martin) in the middle Volga region. The results of the researches made during the period 2012-2014 for incorporated 13 variety samples of alfalfa changeable in the nursery of competitive trials are provided. The most promising population demonstrated economically valuable traits in previous years, from various nurseries of the study were used. Population was created by the polikross. Weather conditions analysis of the region allows us to conclude that over the 2012-2014 they met the requirements needed for the studied culture, providing a sufficiently high potential of productivity, but the limiting factor for the formation of the vegetative mass of alfalfa is the level of moisture. The data on the possibility of obtaining seeds in the year of sowing in the climatic conditions of the Middle Volga region under the condition of early sowing (until 10-12 may) are confirmed. Seed yields in 2012 ranged from 24.7 to 47.8 g/m2. It was found that in different years of moisture supply, taking into regard the conditions of the region, all the studied samples form 2 full-fledged mowing per season. All studied samples can be characterized as highly productive by vegetative mass and seeds. The dry matter accumulation in the estimated samples in the first mowing of 2013 was 0.65-0.68 kg/m2, in the second - 0.38-0.86 kg/m2. In arid 2013, the highest yield of seeds was obtained 337.5-494.7 g/m2. In 2014, the yield of dry matter both mowing was approximately equivalent 0,56-0,79 kg/m2 and 0.54-0.97 kg/m2 respectively, the average for the samples is 0.66 kg/m2 in the first mowing and 0.67 kg/m2 in the second. The yield of seed populations in 2014 ranged from 22.9 to 55.8 g/m2. All studied samples can be characterized as highly productive for the accumulation of dry matter and seed yield.