Investigation was made on the occurrence environment of Dendrolimus kikuchii in Pinus(elliottii) on the lower and middle hills.

On the basis of investigating synthetically and step on and check on the spot,this paper analyses and evaluates the land resourses of Hongqi Valley that the Northeastern low mountains and hills district is representative.

Otherwise,4 optimum varieties at low mountains and hills areas in Hunan Province were screened out, by analysis of morphological character.

Based upon the field survey material of 10 plots(4 650 m~2), the classification system of the forest vegetation on the low mountains and hills in Xu-Lian Ecotone is established, including 2 vegetation type groups, 3 vegetation types, 3 vegetation s.

Based on two phases of TM images in 1986 and 2000 and integrating with the technology of RS and GIS as well as the theory of landscape ecology on a case study of Zhaoyuan,the authors studied the changes of landscape pattern in low hilly region of Jiaodong peninsula and quantitatively analyzed its driving forces by partial least-squares regression model.

Study on variation of landscape pattern changes with elevation in hilly area of western zhejiang-a case study in Tonglu county;