摘要
对枫杨24个种源1年生苗高和地径生长节律进行了测定,结果表明,苗高生长呈单峰型,7月下旬～8月下旬为速生期,8月生长量占全年总生长量的46 05%～60 81%,9月中旬苗高生长停滞,最大苗高2m;苗高生长最快的种源生长高峰期10d生长量可达38cm,根据峰值的位置可将参试种源初分为3个类型:峰值靠前型、峰值靠后型和宽峰持续速生型。参试种源的地径生长可分为2种类型,其中多数种源为双峰生长型,第1生长高峰出现在7月中旬,第2生长高峰在8月中旬、8月下旬或9月上旬,种源间2个生长高峰期的相对生长量有差异;呈单峰生长型的种源,地径生长高峰在7月中旬;高峰期生长最快的种源地径10d生长量可达0 45cm,多数种源到10月14日之前地径仍在生长,但7～9月的生长量占全年生长量的75 89%。
<Abstrcat>The provenance test of 24 provenances of Pterocarya stenoptera C.DC.,in the light of yearling height and diameter of them was carried out.The results showed that of all the provenances,the height growth curve exhibited a single peak,with fast growing stage from the later ten days of July to the later ten days of August,and the highest peak of all up to 38 cm within ten days.It was also concluded that the diameter growth curves had two types,viz.one doublepeak type in the majority and the other singlepeak type in the minority,and the highest peak of all up to 045 cm wthin ten days.And there were significant differences among the provenances characterized by doublepeak type in seedling diameter.
出处
《江苏林业科技》
2002年第4期9-13,共5页
Journal of Jiangsu Forestry Science & Technology
基金
江苏省农业"三项工程"项目"桤木
枫杨优良种源的引进"(P99401)
关键词
枫杨
种源
苗期
生长节律
Pterocarya stenoptera C.DC.
Provenance
Seedling period
Growth rhythm
