The Evaluation Research On Grassland Nutrition And Carrying Capacity Based On 3S Techniques

From 2005 to 2006 in the Xilingol League West Wuzhumuqin county on the main lawn the highest type of biomass, nutritional content, digestibility of forage grass, the carrying capacity of production, nutrition carrying capacity and lawn soil characteristics of the system research. The main conclusion of the study are as follows:1. Natural grassland on the nutritional assessment is of far-reaching practical significance, research papers and more systematic exploration of the natural grassland nutrition evaluation system and evaluation methods, and its evaluation index, the evaluation procedures for research on the system, and nutritional assessment turf 3 S technology and the integration of research, the relevant structures model (Y = 54.0773+161.0464 X R2=0.9054,P <0.05), a total digestible nutrients and the link between vegetation index, to explore means of monitoring natural grassland nutrition and theoretical basis.2. Only on the basis of grass Yield reflect the carrying capacity or turf grass production has shown great potential limitations. The use of advanced satellite remote sensing technology with turf nutrients production evaluation method, estimate turf carrying capacity, will yield carrying capacity and nutritional carrying capacity organic integration, monitoring of grassland resources is very real sense。3. Comparative production carrying capacity and nutritional carrying capacity, the former are much larger than the latter, to yield calculation that the grass carrying capacity, although to meet demand for livestock forage grass, but much can not meet the demand for livestock nutrition, cold season feeding a large number of livestock often requires a higher nutritional content of the forage grass and fodder fine. From another perspective, to inform the carrying capacity should be introduced in the nutritional carrying capacity of the grassland evaluation, a combination of two stocking rate calculation methods to evaluate the grass carrying capacity, contributing to a reasonable set of grassland suitable for the carrying capacity, effectively prevent and control degradation of grassland, protecting natural grassland resources.4. The research papers will investigate air, ground and underground combine three-dimensional form on the whole, the turf - Livestock - soil ecosystem processes of nutrition research, the results show that forage nutrients and soil nutrient content are inseparable, soil nutrient forage is the fundamental source of nutrients. But not all the layers of soil nutrients are forage nutrient absorption accumulated a significant impact. Only grass roots than on the distribution of 10-30 cm of soil nutrients are effective sources of nutrients; other words, although the nutritional status of grassland by a variety of factors, but the soil nutrient content of large, lawn sustainable use, we must maintain the grass - livestock - the soil ecosystem stability, the study of nutrient cycling, for the grass to supply, is the natural turf protection and rational utilization of the importance of building ideas.