论文部分内容阅读
在固沙造林生产实践中,对优良固沙树种的选择,不仅要考察抗旱能力的一般表现,而且还须研究树木的生理适应性。因此,为了提高选择树种的实际效益,充分了解树木的生理生态特点,探索可靠的生理指标是十分必要的。1982年8月至1985年8月对生长在半流动沙丘上的樟子松(Pinus sylvestrs L.Ver.mongolica Litv.)、油松(P.tabulaefusmisCarr.)和赤松(P.densiflora S.et Z.)在自然条件下的抗旱生理特性进行了初步探讨。一、自然概况试验地位于科尔沁沙地东南边缘的章古台地区,年降水量为450—500毫米左右,降雨多集中于7—8月,年均温度5.7℃,极端最高地温为40℃,无霜期为150天左右。
In the practice of sand fixation and afforestation production, the selection of fine sand-fixing species should not only examine the general performance of drought-resistant ability, but also study the physiological adaptability of trees. Therefore, in order to improve the practical benefits of tree species selection, fully understand the physiological and ecological characteristics of trees and explore reliable physiological indicators is very necessary. Pinus sylvestrs L. Ver. Mongolica Litv., P. tabulaefusmisCarr. And P.densiflora S.et Z grown on semi-mobile sand dunes from August 1982 to August 1985 .) Physiological characteristics of drought resistance under natural conditions were discussed. First, the natural profile Experimental site is located in the southeastern margin of Horqin Sandy Taiwan region, the annual precipitation is about 450-500 mm, the rainfall concentrated in July-August, with an average annual temperature of 5.7 ℃, extreme maximum ground temperature of 40 ℃, Frost-free period of 150 days.