干旱区研究2012，Vol.29Issue(5)：743-750,8.
干旱影响下人工林的天然更新进程
Natural Regeneration of Plantation Forests under Drought
摘要
Abstract
Based on the investigation of some typical plantation forests and peripheral natural grasslands in a drought-prone semihumid area on the Loess Plateau, the analyses on meteorological conditions and the trial of shal-low scarification of plantation land with fallen seeds and seedlings for regeneration were mainly regarded the factors affecting the natural regeneration of plantation forests. The results indicated that the germination of fallen seeds on land surface and seedling formation would be the key links for the natural regeneration of plantation forests under drought, in which water factor might be a dominant factor. Closely related to rainfall, the favorable aspects to en-sure seedling occurrence for regeneration is snow cover accumulated in winter without thawing until early spring, and also precipitation lasting for a number of days or continuous rainy overcast appearing in spring or droughty sea-son. Owing to successive scarcity of precipitation in winter and spring, it is difficult to emerge seedlings for regen- eration in dry land. Nevertheless, to earth up may improve soil moisture conditions in dry land for fallen seeds and overcome the restriction of precipitation scarcity, thus the emergence of seedlings for regeneration may be im-proved. In order to stabilize the survival and growth of seedlings and achieve the natural regeneration of plantation forests, it is suggested to take some artificial measures.关键词
人工林/天然更新/幼苗建立/土壤水分/黄土高原Key words
plantation forest/natural regeneration/seedling/soil moisture/Loess Plateau分类
农业科技引用本文复制引用
王晗生..干旱影响下人工林的天然更新进程[J].干旱区研究,2012,29(5):743-750,8.基金项目
国家科技支撑计划 （）
中国科学院知识创新工程重要方向（KZCX2-YW-441,KZCX2-YW-149）项目 （）
