Study On Characteristics Of Forest Litter In HanShan Secondary Forest Area

Forest litter is an important part of forest ecosystems and an important way to return above-ground plant components and nutrients to the soil.In order to study the differences in the amount and thickness of litter between different forests in the HanShan secondary forest area,the Inner Mongolia SaiHanWuLa National Nature Reserve,Inner Mongolia TeJinHanShan National Nature Reserve and Inner Mongolia HuangGangLiang Nature Reserve were used as research areas.The litter of the main group of Populus davidiana,Betula platyphylla and Quercus mongolica Fisch.ex Ledeb.was studied,and the characteristics of litter were analyzed by field investigation and statistics.The main findings are as follows:(1)The existing litter and thickness of litter in Populus euphratica forest in SaiHanWuLa Research Area are as follows:slope below>slope up>slope;the existing stock and thickness of litter in Quercus mongolica Fisch.ex Ledeb.forest are all under slope>slope>slope.sunny slope>Snady slopes.The existing litter and thickness of litter in Populus euphrance forest of TeJinHanShan Research Area are as follows:slope>slope>slope;the existing stock and thickness of litter in Quercus mongolica Fisch.ex Ledeb.forest are as follows:slope>slope>slope,sunny slope>shady slope.The litter of Populus euphratica forest in the HuangGangLiang study area is in the middle of the slope>the slope below the slope,and the thickness is the slope>the slope>the slope;the litter of the Quercus mongolica Fisch.ex Ledeb.forest is the slope>the slope>the slope,the yang Slope>shady slope,thickness is slope>slope up>slope down,sunny slope>shady slope.(2)Spatial heterogeneity:The plaque-like distribution of the litter and thickness of the litter in the Populus euphratica forest of the SaiHanWuLa Research Area is obvious,and the spatial heterogeneity is very strong.The existing litter and thickness of litter in Populus euphratica forest of TeJinHanShan Research Area showed a band-like distribution,and there were also small-scale plaques.The existing litter and thickness of litter in Mongolian slopes were obviously distributed,and the spatial interpolation map usually could not correctly reflect the space.distributed.The existing distribution and thickness distribution of litter in Populus euphratica of HuangGangLiang Research Area,that is,the distribution of high and low values,showed a small range of low-value aggregation.(3)There was a significant positive correlation between the amount of litter and the thickness of the leaves of Populus euphratica forest and Quercus mongolica Fisch.ex Ledeb.forest in the HanShan secondary forest area.The existing amount,thickness and height of the chest,the shrub cover,and the soil at 10cm and 20cm were significantly negative.Correlation;the existing amount and thickness of litter in Quercus mongolica Fisch.ex Ledeb.forest forest were significantly positively correlated with tree height,stand density and chest height.The simple effect analysis of the interaction between slope position and stand density,the interaction between the two has a significant impact on the amount and thickness of litter.