The growth factors and soil nutrient of 3 different age Cunninghamia lanceolata plantations at the 2nd and 7th year after fertilization were studied,the results showed that:the fertilization treatments of N50P100K100Zn25(A3) in the young tree grown and P100K100(C2),P100K100Cu25(C3),P100K100Cu25Zn25 (C4) all reached 0.05 significant difference compared with CK in the annual tree height growth after 2 years.Meanwhile the A3 and N50P100K100(B2) reached 0.05 significant level at DBH growth,and A3 and B3 treatments with N50P100K100Zn25 had a significant effect on the increment of Cunninghamia lanceolata stock volume.The soil pH value of the mid-aged C.lanceolata in the 2nd year after fertilization was higher than the other 2 forest ages,and the pH value was no significant difference at the 7th year after fertilization.As fertilizer efficiency decrease,the pH value of the 3 kinds of C.lanceolata stand stable.The content of soil organic matter in young stage was low,and as forest age increase,the litter increased and the content of organic matter was growing.The total nitrogen content of C2 treatment was higher than that of CK at the 2nd year after fertilization,and the application of nitrogen fertilizer could significantly increase the concentration of N in soil;compared with the background value,the growth rate of 0～ 20 cm soil layer in the 2nd year was 32.2％～ 41.4％,and the increase was between 35％ and 78.1％ at the 7th year;the total potassium content didn't change significantly during the development cycle of C.lanceolata.Fertilization can effectivelyrelieve the soil acidification,the application of P fertilizer could increase the biomass of various organs,and NPK and Zn fertilization treatments could increase the amount of accumulation in the mid-age stage,and the Cu with Zn fertilizer in the near mature forest could prevent the nutrient loss and promote nutrient absorption of C.lanceolata which has an effect on the increase of volume accumulation.
国家科技期刊平台
NSTL
维普
万方数据
