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对杨树秋冬造林与春季造林生长情况进行观察对比发现:苗木秋冬造林比春季造林成活率高,秋栽苗木的树高、胸径、冠幅生长量等均优于春栽苗木。 以中林46杨为例,从2002年春季到2002年12月上旬,安阳市选择各县(市、区)有代表性的样地随机抽样调查,对中林46杨的冬春季物候期、生长量、生长势等方面进行观察对比,结果显示秋冬栽植优势多。 物候期提前。同一杨树品种在基本相同的立地条件下,秋冬栽植的杨树萌芽期、开始速生期均比
Comparison of autumn and winter afforestation of poplar and afforestation in spring found that the survival rate of afforestation in autumn and winter was higher than that in spring. The tree height, DBH and crown growth of autumn planting were better than that of spring planting. Taking Zhong Yang 46 as an example, from 2002 spring to early December 2002, Anyang selected random sampling survey of representative plots of counties (cities and districts) to investigate the phenophase, Growth, growth potential and other aspects of the observation and comparison, the results show that autumn and winter planting more advantages. Phenology in advance. The same poplar varieties in the same site conditions, poplar planting autumn and winter, the beginning of fast-growing period than