The Effect of Different Spacing Between Strips on Caragana Plantation

WANG Jun-zhang1,DUAN He1,BAO Sheng-rong2(1.The Institute of Forestry Monitoring and Planning of Inner Mongolia Autonomous Region,huhhot,010020,China;2.Forestry Bureau of Bayannaoer City of Inner Mongolia,Linhe,015000,China)

Caragana Shrub Line;Growth Character;Soil Moisture;Plant Diversity;Cayouhouqi Banner

Typical plot investigation method was used in this paper to study on the effect of different spacing between strips on Caragana plantation.Results are as follows:1)There is strong relative relationship among the crown width,height,shoot of Caragana shrub.The order of those above growth indicators are: 2m> 16m> 8m> 4m;the order of tuft size are: 2m> 4m> 8m> 16m;the number of branches are: 4m> 8m> 2m> 16m.2)The ratios of annual and perennial branching with a spacing of 2m,4m,8m,16m are 3:7,1:9,3.4:6.4,4:6.The feeding values are more prominent in Caragana forest land with a spacing of 8 m and 16m.3)The soil moisture of forest land are highest with a spacing of 4m or 8m,even with more uniform vertical distribution,which is better than the woodland with a spacing of 2m,16m.4)Comes with the increasing of spacing,wind speed and humidity increase,and the temperature drop.It is more significant in woodland with a spacing of 2m than others.5)The important values of high-quality forage in forest land with a spacing of 4m and 8m accounted for 51.79% ~ 43.03% of the total value,while it is 1/3 for perennial plant,which is better than woodland with a spacing of 2m and 16m.6)The biodiversity index of Caragana forest plant from high to low is 16m> 4m> 8m> 2m,richness index order is 2m> 8m> 4m> 16m,and the evenness index is 2m> 8m> 4m> 16m.7)By integrating the growth situation,important value,biodiversity index,forest soil moisture and the role of forest land on micro-climate regulation in Caragana plantation,forest land with a spacing of 4m,8m was considered to be more suitable for afforestation mode in the studied area.