人为扰动对黄帝陵侧柏生理生态学特性的影响

Effects of the action of human being on physiologic and ecological characteristics of Platydadus orientalis in Huangdi tomb

对黄陵林区人类活动频繁区和人类活动较少区土壤、侧柏的一些生理指标进行了测定,人类活动频繁区比起活动较少区,侧柏生境的土壤pH值增高不显著,有机质含量、速效磷含量、土壤含水量降低极为显著,土壤呼吸减弱极为显著,土地板结现象严重,从而进一步影响到了侧柏的生长,导致人类活动频繁区侧柏的光合强度、蒸腾强度减弱,气孔导度减小。结果表明:采取有效措施保护黄帝陵环境和古柏已迫在眉睫。

Some physiologic indexes of the soil and Platycladus orientalis between the field with more frequent action of human being and the field with less action of human being at Huangdi Tomb were determined. In the field with more frequent action of human being,the pH of the soil raised insignificantly,the organic matter,available P,the respiration and the moisture content of the soil reduced extremely significantly, while the indexes of the soil in the field with less action of human being were on the contrary. Consequently, growth of Platycladus orientalis was affected. It is shown that the intensities of the photosynthesis, transpiration and stomatal conductance rate dropped significantly in the field with more frequent action of human being. The results showed that an effective measure should be taken to protect the environment and Platycladus orientalis of it.