Dynamic Variances Of Plant Communities Under Prohibiting Grazing And Grassland-Livestock Balance In Jinghe County Grassland

Since 2011,grassland protecting policy and relevant measures like prohibiting grazing,rest-grazing,rotational grazing and grass-graze balancing were put into effect widely.In this research,the prohibiting grassland and graze-grass balanced grassland in Jinghe County in Bole Oblast were studied,4 grassland classes and 9 grassland types in prohibiting area and of 8 grassland classes and 23 grassland types in grass-graze balancing area were observed by quadrat sampling method for the height,coverage and biomass.Dynamic changes in biomass,height of grassland plants and total coverage were analyzed in prohibiting grassland and graze-grass balanced grassland area.Comaprison of biological diversity index and production between prohibiting grassland and graze-grass balanced grassland area was made.Dynamic changing regularity of biomass in prohibiting grassland and graze-grass balanced grassland area during 2012-2014 was showen below:(1)Temperate desert type:the biomass of prohibiting grassland area was more than of graze-grass balanced grassland area.Total biomass of prohibiting grassland area was 770.43kg/hm2 in 2012 while the total biomass of graze-grass balanced grassland area was 519.56 kg/hm2;Total biomass of prohibiting grassland area was 525.54 kg/hm2 in 2013 while the total biomass of graze-grass balanced grassland area was 350.40 kg/hm2;Total biomass of prohibiting grassland area was 384.94 kg/hm2 in 2014 while the total biomass of graze-grass balanced grassland area was 341,82 kg/hm2;(2)Temperate grassland type:the biomass of graze-grass balanced grassland area was more than of prohibiting grassland area.Total biomass of prohibiting grassland area was 367.67 kg/hm2 in 2012 while the total biomass of graze-grass balanced grassland area was 632.38 kg/hm2;Total biomass of prohibiting grassland area was 461.10 kg/hm2 in 2013 while the total biomass of graze-grass balanced grassland area was899.67 kg/hm2;Total biomass of prohibiting grassland area was 600.00 kg/hm2 in 2014 while the total biomass of graze-grass balanced grassland area was 341.82 kg/hm2;(3)Temperate meadow steppe type:the biomass of graze-grass balanced grassland area was more than of prohibiting grassland area,three time more especially in 2012.Total biomass of prohibiting grassland area was 453.40 kg/hm2 in 2012 while the total biomass of graze-grass balanced grassland area was 1631.87 kg/hm2;Total biomass of prohibiting grassland area was 779.00 kg/hm2 in 2013 while the total biomass of graze-grass balanced grassland area was806.08 kg/hm2;Total biomass of prohibiting grassland area was 1060.00 kg/hm2 in 2014 while the total biomass of graze-grass balanced grassland area was 1327.28 kg/hm2;The changing regularity of biological diversity index of prohibiting grassland and graze-grass balanced grassland area was:biological diversity index of graze-grass balanced grassland area was higher.Analysis during 2012-2014 showed,richness of species in graze-grass balanced grassland area was kept well and biomass trended to maximum value.