京西山区油松侧柏人工混交林生物量及营养元素循环的研究

Studies on the Biomass and Nutrient Cycling of the Mixed Plantationof Pinus tabulaeformis and Platycladus orientalis in Xishan Region, Beijing

研究了北京西山地区油松侧柏人工混交林的生物量及8种营养元素的生物循环,并与类似立地条件下的同龄油松和侧柏纯林进行了对比分析。结果表明:混交林的生物量和生长量均大于纯林;不同林分不同树种的营养元素吸收、归还、积累和生物循环不同,混交林有利于营养元素的利用。

The biomass production and nutrient cycling of eight elements in the mixed plantation Pinus tabulaeformis and Platycladus orientalis as well as in their respective pure plantations in Beijing's Xishan region were studied. The results show that the biomass and its production rate in mixed stand are higher than those in the two pure stands, the amount of absorption return and retain in the biological cycling are different for different tree species in the different stands. Generally speaking, the mixed stand has some advantages in efficiency of nutrient use.