砒砂岩区主要造林树种沙棘生长限制因子的研究

• 作 者: 李晓琴 秦富仓 杨振奇 刘力川 牛晓乐 刘莹 周美超
• 机 构: 内蒙古农业大学沙漠治理学院,
• 出 处: 内蒙古水利
• 发表日期: 2017年06期
• 关键词: 沙棘林 限制因子 主成分分析 含水率 流域土壤 限制性因子 有机质含量 立地类型 研究区位 综合变量

文章以砒砂岩区的造林树种沙棘为研究对象,运用主成分分析法分析研究影响其生长的限制性因子。结果表明:砂岩区鲍家沟小流域土壤的物理性质(含水率和土壤容重)、养分(速效氮、速效磷和有机质)因子对沙棘生长的影响相对较大,其中,速效氮和速效磷在第一主成分分析变化较大,分别为0.175和0.180;含水率在第二主成分中所占比例最大为0.238。有机质和容重在第三主成分中所占比例最大为0.286和0.282。

In this paper, the seabuckthorn, an afforestation tree species in the sandstone area, was studied. Principal component analysis (PCA) was used to analyze and study the limiting factors that affect its growth. The results showed that the physical properties of soils (water content and soil bulk density), nutrients (available nitrogen, available phosphorus and organic matter) in Baojiagou small watershed in sandstone area had a relatively greater impact on the growth of seabuckthorn. Among them, available nitrogen and available phosphorus The first principal component analysis changed a lot, which was 0.175 and 0.180, respectively. The maximum water content in the second principal component was 0.238. Organic matter and bulk density accounted for the largest proportion of the third principal component of 0.286 and 0.282.