The Characteristics of Nutrient Element Distribution in the Plantation of Larix principis-ruppechtii
In this study,the biomass and the concentrations,accumulation and distribution patterns of four nutrient elements (C,N,P and K) were measured through the survey of sample plots,actual measurements of biomass and indoor experiments,in order to interpret nutrient cycling and to improve forest management in 33-year-old plantations of Larix principis-ruppechtii in Haodifang Forestry Farm of Taiyue Forest Bureau,Shanxi,China.The results showed that,the mean stand biomass of L.principis-ruppechtii was 155.03 t · hm-2,of which,tree layer biomass was 105.25 t · hm-2,accounting for 67.87％ of the total.The concentrations of 4 nutrient elements in assimilating organs of L.principis-ruppechtiiwere were significantly higher than those in other organs,the lowest in stem.The nutrient concentrations of tree layer were higher than shrub,herb and litter layers.The concentration of litter layer was the lowest.Except for K,the soil nutrient concentrations presented a decreasing trend with the increase of soil depth.The total nutrient accumulation of the 33-year-old plantation of L.principis-ruppechtii was 24.85 × 104 kg · hm-2.The accumulation of each layer was in the order of soil layer＞tree layer＞litter layer＞herb layer＞shrub layer.The biomass of the stem was the highest,and its nutrient accumulation was also the highest.
Larix principis-ruppechtiibiomassnutrient concentrationaccumulation and distribution
国家科技期刊平台
NSTL
万方数据
维普
