杨树造林的生产力与初植密度有着密切关系。适当的初植密度往往是提高杨树产量的重要因素,而这一数值常因土壤、气候、品种、培养目的而不同。根据国际}一分树会议的村料.杨树初植密度有三种类型,郎:①密-一株距。.5一4 .0米,每公顷625一一10000松::卜刃中等-株距5一7米,娜公顷2。。一钾子株;③稀 Poplar afforestation productivity and plant density are closely related. Appropriate initial planting density is often an important factor to improve poplar production, and this value often due to soil, climate, variety, training purposes and different. According to the international} a sub-tree meeting village material. Poplar early planting density has three types, Lang: ① dense - a distance. .5 a 4 .0 m, 625 per hectare 11 000 Eucalyptus :: Bu blade medium - spacing 5 to 7 meters, Na hectare 2. . A potassium plant; ③ rare