土地利用与裂缝对采煤沉陷土壤养分的影响

发布时间：2018-05-29 03:52

本文选题：土地利用 + 地表裂缝　；参考：《河南理工大学学报(自然科学版)》2017年03期

【摘要】：为更好地理解矿区土壤退化机理,选择焦作采煤沉陷区4种代表性土壤景观即有裂缝耕地、无裂缝耕地、有裂缝林地、无裂缝林地,评价土地利用与裂缝对沉陷土壤养分的影响。沉陷区耕地与林地2种利用方式中土壤有机碳(SOC)、全氮(TN)、全磷(TP)含量差异不显著(P0.05),但裂缝有无对这3个养分参数影响显著(P0.05);土地利用方式(耕地、林地)与裂缝因素(裂缝有无)之间的交互作用对SOC含量影响显著(P0.05)。沉陷区SOC,TN,TP含量均表现为:无裂缝的林地与耕地有裂缝的林地与耕地(P0.05)。与对照区相比,4种景观的SOC含量均显著下降(P0.05),TN,TP仅在有裂缝的耕地与林地显著降低(P0.05)。研究结果表明,裂缝加剧了沉陷区耕地与林地的土壤C,N,P库损失,尤其是C库损失。在有裂缝情况下,沉陷耕地-林地转变降低土壤C库损失,但在无裂缝情况下,该转变加剧土壤C库损失。
[Abstract]:In order to better understand the mechanism of soil degradation in mining area, four kinds of representative soil landscape were selected in Jiaozuo coal mining subsidence area, that is, cracked farmland, no cracked farmland, cracked forest land and no cracked forest land. To evaluate the effects of land use and cracks on soil nutrients. There were no significant differences in soil organic carbon (SOC), total nitrogen (TNN) and total phosphorus (TP) contents between the two utilization modes of cultivated land and woodland in subsidence area, but there was no significant difference in the contents of soil organic carbon (SOC), total phosphorus (TN) and total phosphorus (TP), but whether the cracks had a significant effect on these three nutrient parameters (P0.05), land use patterns (cultivated land), The interaction between forest land and fissures (whether there is a crack or not) has a significant effect on SOC content (P0.05). The contents of TNTP of SOCN in subsidence area were as follows: uncracked woodland and cultivated land with fissured woodland and cultivated land (P0.05). Compared with the control area, the SOC content of the four landscape decreased significantly only in the cropped farmland and forest land. The results show that the cracks aggravate the loss of soil C ~ (+) N ~ (+) P pool, especially the loss of C pool in cultivated land and forest land in subsidence area. Under the condition of crack, the change of subsidence farmland and woodland reduces the loss of soil C pool, but in the case of no crack, the change intensifies the loss of soil C pool.
【作者单位】：河南理工大学测绘与国土信息工程学院;
【基金】：国家自然科学基金资助项目(41301617,u1261206) 河南省博士后科研项目(2012053)
【分类号】：S158

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