Study on Growth of Several Pine Trees in Desertification Area of Jianshui County

The growth of 10-year plants such as Pinus yunnanensis,Pinus massoniana,Pinus caribaea and Pinus elliottii cultivated in desertification area of Jianshui county was investigated.The result from variance analysis of tree height,chest diameter,crown and LSD examination showed that Pinus caribaea was the biggest and Pinus yunnanensis was the smallest in terms of average annual growth of height and chest diameter;while Pinus yunnanensis was the biggest and Pinus massoniana was the smallest in term of average annual growth of crown.Therefore,Pinus caribaea and Pinus massoniana could be as tree species for afforestration in this desertification area,and Pinus yunnanensis also could be chosen owning to indigenous species;Pinus elliottii suitable for small diameter timber could prepare for being chosen as well.