摘要
针对长期以来干旱地区杨树春季造林质量不高问题，进行了春季不同时间造林的试验。结果表明：（1）在干旱地区，随着春季造林时间的后移，其林分的成活率、保存率、萌蘖率、1级木和林木生长量递减，并且树冠结构的各项指标和叶量分布指数及叶面积指数也随之递减，而萌蘖度（P值）和3级木递增；（2）在干旱地区春季造林时间以4月1日-15日为宜；（3）在干旱地区营造杨树速生丰产林，适宜的土壤含水率应在17％以上；（4）环境因子与萌蘖率、保存率和成活紧密相关的排序依次为气温、地温、日蒸发量、土壤含水率；萌蘖率与树冠各项指标均呈极显著负相关，其排序为叶量分布指数、叶片数、枝条数、树冠长度、冠幅、枝下高、叶面积。
According to the quality of poplar spring afforestation was low in arid areas for a long time, so the spring afforestation experiments were carried out at different time. The results showed that ： （ 1 ） in arid regions, with postponed of the spring afforestation time, survival rate, preservation rate, shoot rate, the first level wood and timber growth were reduced, and the each indicators of canopy structure, leaf distribution index and leaf area index also reduced, while the shoot - degree （ p value） and the third level wood increased; （2） April 1 to 15 was appropriate afforestation time in arid region; （3） The poplar fastgrowing and high- yield plantation was created in arid regions, suitable soil water content should be over 17% ; （4） Environmental factors and shoot rate, preservation rate and survival were closely related, descending order of the relevant was the temperature, ground temperature, daily evaporation, soil water content rate ; Shoot rate and each of the canopy indicators presented significant negative correlation, descending order of the negative correlation was the leaves amount distribution index, leaf number, branch number, crown length, canopy, height under branch, leaf area.
出处
《内蒙古农业大学学报（自然科学版）》
CAS
北大核心
2010年第1期67-71,共5页
Journal of Inner Mongolia Agricultural University(Natural Science Edition)
基金
内蒙古植物种质资源整理整合与共享
关键词
干旱地区
小美旱杨
造林时间
造林质量
萌蘖率
成活率
Arid region
populus simonii x （ Populuspyramidalis ＋ Salixmatsudana） cv. Poplaris
afforestation time
shoot rate
survival rate
