毛乌素沙地南缘樟子松人工林土壤理化性质差异及其与林分生长的关系

发布时间：2018-04-26 21:20

  本文选题：近自然化培育 + 密度梯度　； 参考：《干旱区资源与环境》2017年08期

【摘要】：对比研究毛乌素沙地南缘不同密度樟子松人工林林下各土层(0~10cm,10~30cm,30~60cm)土壤理化性质差异及与林分生长关系。结果表明:自然化培育下的人工林林地土壤物理性质:PⅦ和PⅧ样地总孔隙度和毛管孔隙度较高,持水能力较强且与其它样地差异明显。土壤化学性质:PⅧ和PⅪ样地各层土壤的全N、P含量、水解性N、有效P含量较高且与其它样地差异明显;全K含量和pH值在各样地土层无明显差别;有机质方面,上层土壤有机质含量PⅠ,PⅣ,PⅥ,PⅧ,PⅩ,PⅪ样地含量高于其它样地。结合频度分布和Pearson分析结果,土壤化学物质对林分生长如树高、胸径有较好的支撑作用。综合考虑PⅧ样地林地密度为较为合适的造林密度,可以更好地发挥其半干旱地区的生态效益。
[Abstract]:The soil physicochemical properties of different densities of Pinus sylvestris var. mongolica plantation with different densities in the southern edge of Maowusu sandy land were studied. The difference of soil physical and chemical properties and the relationship between soil physicochemical properties and stand growth were studied. The results showed that the soil physical properties of the plantations cultivated naturally were higher total porosity and capillary porosity than those of the other plots, and the water holding capacity of the plots was higher than that of other plots. Soil chemical properties: total N P content, hydrolytic N content, available P content of each layer of sample plots: P 鈪，

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