Study On Carbon Storage Of Artificial Grassland In Hulunbeier

The grassland is an important component part of terrestrial vegetation, and is also one of the world’s most widely distributed vegetation type, which covers25-50%of land area, but in recent years, the shrinking of natural grassland aggravate decreased C storage with the increasing of destruction on the natural grassland.. Due to reduce of natural grassland, artificial grassland was planted to compensate for the carbon sequestration capacity of natural grassland. Forage variety of carbon sequestration capacity and carbon storage become particularly important in the artificial grassland. Both the natural grassland of Hulunbeir and several forage varieties of artificial grassland were as research objects in our study, plant species above-ground biomass, below-ground biomass, plant C content,root C content and soil C content were measured for both natural grassland and artificial grassland. The difference of natural grassland and artificial grassland were studied by comparing carbon storage and vertical distribution of plant species. The basic data of grassland rational utilization can, be provided in carbon storage aspects by discussing difference of vegetation carbon sequestration capacity between natural grassland and artificial grassland.The results are as follows:1. Root biomass of forage species were significantly different for both natural grassland and artificial grassland (P＜0.05) The unit area of root biomass are Natural Grassland:825.2g/m2; AC Nordic:515.9g/m2;2006-8:1116.3g/m2; Carlton:496.5g/m2; Kirk:628.4g/m2; AC Parkland:794.6g/m2, and the below-ground biomass of Alfalfa2006-8was the highest in all forage species.2. The carbon density of vegetation was higher in artificial grassland than in natural grassland (P<0.05).Both vegetation carbon density and root carbon density were significant difference for different plant species. The52%-91%root carbon reserves are concentrated in0-30cm soil layers by measuring lm carbon storage.3. Both carbon density of vegetation and carbon density of root were different for different species. The soil carbon density of different plant species as follows: the natural grassland:12590.9g/m2; AC Nordica:13202.9g/m2;2006-8:11682.7g/m2;AC Grazeland:11563.1g/m2; Carlton:10174.7g/m2;Kirk:11535.9g/m2and AC Parkland:12787.6g/m2, whereas the soil carbon density of AC Nordica alfalfa was the highest in all species (13202.9g/m2).4. The total carbon storage was not identical for different forage species in both Natural grassland and artificial grassland (vegetation carbon storage+root carbonstorage+soil carbon storage),and the total carbon storage of alfalfa AC Nordica was the highest in per unit area (13475g/m2). Carbon storage of other forage species in unit area were:Natural Grassland:12919.0g/m2;2006-8:12177.1g/m2; ACGrazeland:11932.4g/m2; Carlton:10456.1g/m2;Kirk:1185.5g/m2;AC Parkland:13222.1g/m2.