Study on nutrient input in atmospheric wet deposition of Laris principic-rupprechtii plantation in northern Yanshan Mountains
In order to study the nutrient input of annual precipitation in the northern mountain forest of Yanshan,this study collected precipitation from August 2020 to July 2021 in the Larix principis-rupprechtii plantation in the northern mountain of Yanshan.The contents of large amounts of elements,trace elements and heavy metals in precipitation were determined,and the seasonal dynamics of precipitation and the correlation between elements were analyzed.The results show that:(1)The overall precipitation of a large number of elements in seasons followed the sequence of summer,spring,autumn and winter.The total precipitation of N,P,K and S were 9.87,0.04,2.28 and 240.59 kg/hm2,respectively.(2)Most of the trace elements also showed the highest precipitation in summer,and the total precipitation values of chlorine,iron,manganese,zinc and copper were 6582.39,12.76,6.26,30.32 and 3.91 g/hm2,respectively.The precipitation of boron element was the highest in spring whose total precipitation value was 68.18 g/hm2.(3)The precipitation of three heavy metal elements chromium,lithium and nickel was the highest in summer,and their total precipitations were 2.30,2.42 and 1.64 g/hm2,respectively.The deposition amounts of cadmium and cobalt were the highest in autumn,and their total deposition amounts were 0.43 and 0.14 g/hm2,respectively.The precipitation of Pb element was the highest in winter,and the total precipitation was 1.41 g/hm2.(4)The element correlation results showed that TP,TN and K,Cl,Zn and Mn were all positively correlated,so nitrogen,phosphorus and potassium in a large number of elements,and manganese,zinc and chlorine in trace elements might have the same source or similar migration rules.This study preliminarily identified the nutrient input of annual precipitation in the northern mountain forest of Yanshan,which is of great significance for understanding the nutrient cycle of the forest in this area.
atmospheric wet depositionmacroelementstrace elementsheavy metal elementsseasonal dynamics
NETL
NSTL
万方数据
