摘要
为了掌握零星沙地人工林营造后的固沙效果，通过样地调查方法，对张家口市黄洋滩的人工固沙林里的小叶杨（Populus simonii Carr．）、小美旱杨（Populus popular＇s）、新疆杨（Populus alba）3个品种，不同年龄和组成的8个人工固沙林类型，林分结构因子进行了调查，同时采用10孔阶梯式集沙仪对林分的输沙率进行了观测，分析了林分结构因子与输沙率的相关性。结果表明：不同类型林分的输沙率不同，但所有林分的集沙都发生在地面以上10cm高度范围内，其中，80％～90％集中在4cm高度范围内，林分输沙率随垂直高度的增加而减小，各垂直层面的集沙量表现出0～2cm〉2～4cm〉4～6cm〉6～8cm〉8～10cm的规律。输沙率在水平方向和垂直方向分别受到林分郁闭度和树木高度的显著影响，二者共同作用，能够明显降低输沙率，但林分输沙率并未受到林分类型、平均冠幅和草本层盖度的显著影响。总体而言，不同类型的杨树人工固沙林不同程度地起到了拦截风沙、降低风蚀的作用。
In order to understand the effect of sand fixation plantation in scattered sandy land, there were eight different types of poplar stand were surveyed by the method of sample-plot, including three tree species of Populus simonii Carr. , Populus simonii X （Populus pyramidalisq-Salix matsudana ） cv. Poplaris, and Populus bolleana , Mmeanwhile, sand transporting rate was observed by 10-hole sand gathering machine. The results showed that sand-fixation plantations played an important role in blocking sand, reducing wind erosion. Different types of stands had different sand transporting rates, but 80%-90% of sand was shifted only under the height of 4 cm above ground, and reducing along the height, the volume of transported sand was ranked as 0-2 cm-2-4 cm -4-8 cm -80-10 cm. The study also discovered that sand transporting rate was influenced by both canopy density and average tree height in horizontal and vertical direction respectively, but it was not affected by stand type, canopy breadth and herb layer coverage.
出处
《河北农业大学学报》
CAS
CSCD
北大核心
2013年第5期65-70,107,共7页
Journal of Hebei Agricultural University
基金
国家林业局林业公益性行业科研专项(201104104)
河北省林业厅科研项目(0527293)
关键词
冀北零星沙地
杨树
人工固沙林
输沙率
scattered sandy land of in Northern Hebei
Poplar tree
sand fixation plantation
sand transporting rate
