兴城市位于辽宁省西部,北纬40°16′—40°49′,东经120°5′—120°48′。1967—1986年平均年降水量590.1mm,最高年份908.0mm,最低383.5mm。年蒸发量1485.4mm。属于辽宁西部、河北北部半干旱气候类型。刺槐是兴城市,也是辽宁省西部、河北省北部地区造林的主要树种之一,刺槐造林面积占60%以上。营造刺槐林都是春秋两季。我们通过在兴城市30来年的林业生产实践和调查研究,认为这个地区造刺槐林秋季比春季好。秋季造刺槐林不但成活率高,有益于加快绿化速度,还可避开春耕农忙季节,利用秋 Xing City is located in the western Liaoning Province, latitude 40 ° 16’-40 ° 49 ’and longitude 120 ° 5’-120 ° 48’. 1967 - 1986 average annual rainfall of 590.1mm, the highest year 908.0mm, the lowest 383.5mm. Annual evaporation 1485.4mm. Belongs to western Liaoning, northern Hebei semi-arid climate type. Robinia pseudoacacia is a city of Xing and one of the main tree species afforestation in the western part of Liaoning Province and northern part of Hebei Province. The acacia planting area accounts for more than 60%. Robinia is to create both spring and autumn forest. Through the 30 years of forestry production and research in Xingcheng City, we think that the Robinia pseudoacacia forest in this area is better than the Spring in autumn. Robinia pseudoacacia autumn forest is not only high survival rate, beneficial to speed up the speed of greening, but also to avoid spring busy season, the use of autumn