不同经营方式马尾松人工林养分消耗的研究

摘要

The concentrations,consume and distribution of 3 nutrient elements (N,P,K)in different mode operation of Pinus massoniana plantations of different age classes were studied.The results showed that nutrient concentrations were the highest in needles and the lowest in stems.The total nutrient consume in Pinus massoniana plantations ranged from 469.68 kg/hm2 to 1 577.08 kg/hm2 ,nutrient concentration increased with stand growth.The nutrient annual net con-sume in components from 31.31 kg/hm2 to 41.5 kg/hm2 ,which increased with stand growth.The nutrient depletion of large-diameter timber management style taked up 62% of the traditional mode of operation.%对不同经营方式马尾松人工林内 N、P、K 3种养分元素的含量、消耗和分配以及它们随林分年龄的变化趋势进行了研究。结果表明：针叶的养分含量最高，树干材的养分含量最低。3种元素消耗总量为469.68～1577.08 kg／hm2，随生长过程中生物量的增加而增大。年净消耗量为31.31～41.5 kg／（hm2·a），随林分年龄增加而增加。大径材经营方式养分消耗为传统经营方式的62％。