黄河三角洲典型人工林土壤碳氮磷化学计量特征

发布时间：2018-05-22 09:19

本文选题：黄河三角洲 + 人工林　；参考：《土壤通报》2017年02期

【摘要】：为阐明黄河三角洲不同人工林类型对盐碱化土壤碳(C)氮(N)磷(P)含量及生态化学计量特征的影响,选取刺槐、臭椿、杨树、白蜡、榆树、国槐和柽柳等7种典型人工林为研究对象,运用模糊数学隶属函数法综合评价林型对土壤营养和化学计量特征的影响。结果表明:黄河三角洲地区7种林型土壤C、N含量处于全国土壤平均含量的最低水平,P含量居中等水平。各林型土壤表层C、N含量较高,P含量从上至下分布规律不同,分别呈逆向、"V"型和倒"V"型分布。臭椿林土壤C、N、P元素平均含量最高,柽柳林土壤最低,前者分别是后者的1.5、1.7和1.2倍。7种人工林土壤N∶P平均值为0.76,远远低于全球平均水平(5.9)和我国平均水平(3.9),表明该区域人工林受到严重的土壤N限制。综合评价对林地土壤营养、土壤物理性质和化学计量改良作用最好的是国槐林,改良作用最差的为白蜡林。建议在该区域优先选择国槐改良盐碱化土壤,其次为杨树和榆树。
[Abstract]:In order to elucidate the effects of different artificial forest types on P) content and ecological stoichiometric characteristics in saline and alkaline soil, Robinia pseudoacacia, Ailanthus sinensis, poplar, white wax and elm were selected. Seven typical plantations, such as Sophora japonica and Tamarix chinensis, were used to evaluate the effects of forest types on soil nutrition and stoichiometric characteristics by fuzzy mathematical membership function method. The results showed that the contents of Con N in 7 forest soils in the Yellow River Delta were at the lowest level of the average content of soil in the whole country and the content of P was in the middle level. The distribution of C ~ (+) N from top to bottom was different from top to bottom in different forest soil surface layer, and it was distributed in reverse, "V" type and "inverted" type, respectively. The average content of C ~ (2 +) N ~ (+) P in soil was the highest, and the lowest in Tamarix chinensis forest. The average value of soil N: P of the former is 1.5N 1.7 and 1.2 times that of the latter, which is 0.76, which is far lower than the global average of 5.9) and the average of China is 3.9%, which indicates that the plantation in this region is severely restricted by soil N. The effect of comprehensive evaluation on soil nutrition, soil physical properties and stoichiometric improvement of forest land was the best for the national Sophora locust forest, and the wormwood forest was the worst. It is suggested that the national Sophora japonica should be selected first in this area to improve the saline-alkali soil, followed by poplar and elm.
【作者单位】：滨州学院山东省黄河三角洲生态环境重点实验室;山东农业大学资源与环境学院;
【基金】：山东省重点研发计划(2015GNC111022) 山东省高校科研发展计划项目(J13LE58,J15LE16) 国家自然科学基金青年项目(41501088) 滨州学院科研基金项目(BZXYL1108)资助
【分类号】：S714.2

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