论文部分内容阅读
矿质营养乃植物生长所必需,树体中营养元素的含量不仅直接反映了林地肥力状况,而且与整个森林生态系统的生产力密切相关。深入了解林木营养元素含量,对经营措施的制定及速生优质丰产林的营造都具有指导作用。华山松(Pinus armandi)是秦岭林区的主要成林树种,在陕西省分布约8.5万公顷,蓄积量约5000万米~3。对其营养循环进行研究,在提高林地生产力方面具有十分重要的意义。有关木本植物矿质分析,我国植物生态学家侯学煜等(1959、1982)曾有过详细的论述,总结了我国17年(1950～1966)来在
Mineral nutrition is necessary for plant growth. The content of nutrients in the tree not only directly reflects the fertility status of the forest, but also is closely related to the productivity of the entire forest ecosystem. In-depth understanding of forest nutrient content, the establishment of management measures and fast-growing high-quality high-yielding forest have a guiding role. Pinus armandi (Pinus armandi) is a major forest tree species in the Qinling Mountains. It has a distribution of about 85,000 hectares in Shaanxi Province with an accumulated volume of about 50 million m3. Researching on its nutrient cycle is of great significance in improving the productivity of forestland. The woody plant mineral analysis, China’s plant ecologist Hou Xueyu (1959,1982) had a detailed discussion, summed up the 17 years of our country (1950 ~ 1966) came in