不同种源野鸦椿一年生苗生长规律研究

Study on Growth Rule of Annual Seedlings of Euscaphis japonica from Different Provenances

对贵州5个种源野鸦椿一年生实生苗的苗高和地径生长规律进行观测。结果表明,苗高和地径在各种源间存在极显著差异,且符合Logistic生长曲线,将野鸦椿苗木的整个生长时期划分为出苗期、生长初期、速生期和生长后期4个阶段,纳雍种源苗高速生期短而生长速度快,进入生长后期较其他种源早,且进入生长后期以后苗高还在不断生长;黔西种源地径的速生期比其他种源晚,进入生长后期也晚,生长期内苗木的地径均高于其他几个种源。苗高和地径生长持续时间不一致,高、径生长期相差半个月左右。总体表现为纳雍、黔西种源苗高、地径生长量均高于榕江、大方和道真种源。

The growth rules of seedling height and ground diameter of annual seedlings of 5 provenances of Euscaphis japonica in Guizhou were observed.The results showed that there were extremely significant differences in seedling height and ground diameter among different E.japonica sources,which were in line with the Logistic growth curve.The whole growth period was divided into four stages,namely period of emergence,early growth stage,rapid growth stage and late growth stage.The provenance from Nayong had a short growth period and a fast growth rate,and entered the later growth period earlier than other provenances,and the seedling height continued to grow after entering the later growth period.The fast-growing period of ground diameter of the provenance from western Guizhou was later than that of other provenances,and the ground diameter of seedlings in the growth period was higher than that of other provenances.The growth duration of seedling height and ground diameter was not consistent,and there was a difference of about half a month between seedling height and ground diameter.In general,seedling height and ground diameter growth of Nayong and Qianxi provenances were higher than those of Rongjiang,Dafang and Daozhen provenances.