立地条件对大青杨幼树生长影响的研究

Study on Site Conditions for Saplings Growth of Populus ussuriensis Kom

利用伊春林科院选育的大青杨优良无性系营造原料林,进行不同立地因子对苗木生长影响的试验研究。主要进行了地势和迹地类型栽培试验,在不同的地势上进行试验表明,平坦地由于雨季有积水,造成苗木生长量与附近的坡地相比偏低,其生长量相差很大;岗处可比平坦地高生长提高37.2～44.3%,地径提高17.9～51.7%。说明大青杨虽然喜湿,但忌涝,栽植大青杨无性系应选择缓坡、含水量充分,且不积水的地块。不同迹地类型试验结果是退耕还林迹地高生长比皆伐迹地提高47.6%,比筑高台的低湿地提高27.6%;地径比皆伐迹地提高95.3%,比低湿地提高38.5%。说明退耕还林迹地是营造大青杨优良无性系原料林、丰产林最佳迹地类型选择。

Use of Populus ussuriensis Kom.Yichun Academy of selection of superior clones of raw materials to create a forest,for different site factors affecting the growth of seedlings studied.Mainly for the type of terrain and slash cultivation experiment,the different terrain on the tests showed that flat water as the rainy season has caused the amount of seedling growth is low compared with the nearby slopes,the amount of growth vary greatly,the post office than flat to high growth increased 37.2 ~ 44.3%,diameter increased 17.9 ~ 51.7%,indicating that although the hi Populus ussuriensis Kom.,but avoid water logging.Planting should be selected clones Populus ussuriensis Kom.,water content fully,without water the land.The results of different types of slash is returning farmland to forest clear-cutting of high-growth track than the 47.6% increase,compared with the low humidity build high-27.6% increase,to increase the diameter ratio of clear-cutting tracks 95.3%,38.5% increase compared with low humidity.Forest slash note is to create materials of superior clones Populus ussuriensis Kom.,ield the best slash forest type selection.