Abstract：[Background] Soil fertility affects tree growth and development, whereas tree growth also changes soil fertility. Exploring the relationship between tree species and soil nutrients will contribute to the structural adjustment of plantations and soil fertility restoration, and thus provide guidance on management and regulation of plain afforestation as well as soil ecological restoration.[Methods] Five kinds of pure plantations (Sophora japonica, Populus tomentosa, Ginkgo biloba, Pinus tabuliformis, Ulmus pumila) in the plain afforestation area, Daxing District, Beijing were selected for the determination of soil particle fractal dimension, organic matter, total nitrogen, total phosphorus, total potassium, available phosphorus and pH at depths of 0-20 and 20-40 cm. Principal component analysis was used to evaluate the effect of tree species on soil fertility quality.[Results] (1) Soil texture of the study area was sandy loam, with soil particle fractal dimension in the range of 2.439 to 2.609, and there existed no significant differences between tree species. (2) At 0-20 cm, the effects of tree species on soil organic matter, total nitrogen, total phosphorus and available phosphorus were significantly different (P < 0.05). At 20-40 cm, tree species had significant effects on soil total nitrogen, total potassium and pH value. With the increase of soil depth, soil organic matter, total nitrogen and phosphorus decreased significantly. In general, total nitrogen and total phosphorus were in a state of deficiency, while available phosphorus mass fraction and pH value were high. (3) At 0-20 cm, soil particle fractal dimension had a very significant positive correlation (P<0.01) with soil total nitrogen, and a significant positive correlation with soil organic matter (P < 0.05). At 20-40 cm, soil pH was significantly and negatively correlated with total nitrogen, but positively correlated with total potassium and available phosphorus. (4) Principal component analysis showed that soil particle fractal dimension, total nitrogen and total potassium had the greatest influence on soil fertility quality evaluation. The final comprehensive score was in the order of P. tabuliformis > S. japonica > G. biloba > P. tomentosa > Ulmus pumila.[Conclusions] Plain afforestation in Daxing District of Beijing should select tree species according to the purpose of afforestation and give priority to S. japonica and P. tabuliformis in order to improve soil physico-chemical properties in the short term. To better the effects, traditional fertilizer and organic fertilizer should be applied together so as to provide a good growth environment for the tree species.
郑永林, 王海燕, 解雅麟, 李翔, 秦倩倩, 杨丹丹. 北京平原地区造林树种对土壤肥力质量的影响[J]. 中国水土保持科学, 2018, 16(6): 89-98.
ZHENG Yonglin, WANG Haiyan, XIE Yalin, LI Xiang, QIN Qianqian, YANG Dandan. Effect of tree species on soil fertility quality in plain afforestation area, Beijing. SSWC, 2018, 16(6): 89-98.
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2018, Vol. 16 
