Preliminary Study On Comparison Of Different Using System On Natural Glassland

The study on comparison of different utilizations of natural grassland in Zhaosu Horse Farm is conducted by analyzing the ecology of grassland in seasonal uses and forage productivity under utilizations of enclosure, traditional grazing and two seasons of cold and warm. Based on the win-win of ecology and economics, the better way of grassland utilization can be achieved by study and analysis, which could keep natural grassland development with stability, health and endure. Seasonal using of natural grassland in Zhaosu horse farm is chosen to be the research subject and investigation outside and data analysis inside are combined to analyze community characteristics of main plants and forage nutrition. The result shows:1.Dynamics of above-ground biomass and height of spring-autumn grassland under different patterns of utilization:under the utilization of enclosure, above-ground biomass and height shows curve pattern of contrary "V"; under the utilization of traditional grazing and herding in the warm season with supplementary raising in the cold season outside fences, above-ground biomass and height changes in curve pattern of contrary "W". Dynamics of ratio of dry to fresh weight of above-ground biomass of spring-autumn grassland under different utilizations:Ratio of dry to fresh weight of above-ground biomass with enclosure rises slowly, outside fences shows "W" pattern under the utilization of traditional grazing and herding in the warm season with supplementary raising in the cold season. Dynamics of average coverage and density:The value of average coverage and density are high in the pattern of enclosure; Combined with density, coverage, height, ratio of dry to fresh weight, obvious characteristics of spring-autumn grassland is:inside fences>traditional grazing>outside fences.Above-ground biomass of summer grassland with enclosure totally shows "V" pattern, height outside fences under the utilization of herding in the warm season with supplementary raising in the cold season decrease slowly. Dynamics of ratio of dry to fresh weight of above-ground biomass of summer grassland under different utilizations:Ratio of dry to fresh weight of above-ground biomass with enclosure shows "W" pattern, while outside fences under the utilization of traditional grazing and herding in the warm season with supplementary raising in the cold season shows the pattern of contrary "V". Dynamics of average coverage and density:The value of average coverage and density are high in the pattern of enclosure; Combined with density, coverage, height, ratio of dry to fresh weight, obvious characteristics of summer grassland is:inside fences> outside fences.Plant species of winter grassland are rich. And there are more than twenty species in the investigation sample. The total coverage of grassland community reached100%, above-ground biomass are between809.55g/m2and809.55g/m2. Average height of plant is25.64cm, ratio of dry to fresh is48.2%. Re-growing height after cutting for a month is6.91cm, above-ground biomass is165.4g/m2.2. Forage nutrients of spring-autumn under different utilizations:The content of crude protein in the ways of traditional grazing is the highest and the average content of crude fat of forage economic groups inside fences is the highest. And the content of crude fiber of forage economic groups under different pattern of uses are all lower than25%. The content of crude ash outside fences is9.075%and the highest. In all, the average content of forage nutrients on spring-autumn grassland under different utilizations is11.38%inside fences,11.26%outside fences and11.67%in the pattern of traditional grazing.The average content of forage nutrients on summer grassland is:The content of crude protein inside fences is low and the average content of crude fat is:outside fences> inside fences. The content of fiber is: inside fences> outside fences. The average content of crude fiber among forage economic groups on summer grassland is all below25%and the content of crude ash is:outside fences>inside fences.Forage nutrients of different economic groups inside fences on winter grassland is:The content of crude protein of lemius grass is the highest and the content of crude fat of is the highest. The content of crude fiber of forage economic groups on winter grassland is above25%and its content of subordiont is the lowest. The content of ash in is the highest. The average content of forage nutrients on winter grassland on winter grassland under the pattern of traditional grazing is:crude fat2.828%, crude fat28.228%, crude protein11.28%, crude ash7.225%.