适地适树 目前,社队造林还不能采用及时灌水和施肥等集约经营的措施.在这种情况下,如果不能因地制宜选定树种或因树制宜选造林地,就很难保证造林的成活率.辽西干旱地区大部分为石质山地,土地瘠薄,一般土层厚度为10～30厘米.多年实践证明,造林应以油松为主,背风向阳的山下腹可栽刺槐;侵蚀沟可营造刺槐、棉槐和沙棘子等根蘖性强的保 Appropriate tree At present, the afforestation and social teams can not be used to timely irrigation and fertilization and other intensive management measures.In this case, if you can not choose the appropriate tree species or afforestation, it is difficult to ensure the survival of afforestation Rate. Most of the arid western Liaoning Province is stony and mountainous, the land is barren, and the thickness of common soil is 10-30 cm. It has been proved for many years that afforestation should mainly be with Pinus tabulaeformis, Robinia pseudoacacia, Sophora japonica and seabuckthorn strong rooting Paul