昆阳磷矿植被修复土壤理化与生物学性状的典型相关分析

深入了解昆阳磷矿植被修复土壤理化性状指标与生物学各个性质指标之间的关系，可为进一步筛选土壤质量评价指标提供参考依据。选择了昆阳磷矿旱冬瓜人工林6个不同植被恢复年限样地，研究其土壤厚度、容重、孔隙度、毛管孔隙度、含水量、pH值、有机质、碱解氮、全氮、有效磷、全磷、速效钾、全钾和土壤微生物生物量碳（MBC）、微生物生物量氮（MBN）、氮矿化速率、β-葡萄糖苷酶、酸性磷酸酶、脲酶的关系，综合土壤13个理化性状指标和6个生物学性状指标的典型相关分析得到4对典型变量，其典型相关系数分别为0.997 0，0.988 9，0.879 9，0.856 8，均达到极显著水平（p≤0.01），说明土壤理化性状和生物学性状存在显著相关关系，而这两组性状的显著相关主要是由土壤碱解氮、有机质、有效磷、全磷、pH值和微生物生物量碳（MBC）、微生物生物量氮（MBN）、氮矿化速率、脲酶的密切相关引起的，其中有机质与微生物生物量碳（MBC）、微生物生物量氮（MBN）、脲酶之间呈极显著相关，有效磷、全磷与氮矿化速率、微生物生物量氮（MBN）、微生物生物量碳（MBC）也呈极显著相关，碱解氮、pH值与微生物生物量碳（MBC）、微生物生物量氮（MBN）、脲酶呈极显著相关，全氮与β-葡萄糖苷酶、氮矿化速率、微生物生物量氮（MBN）呈极显著相关。

Analysis of Canonical Correlation Between Soil Physical,Chemical and Soil Biological Properties in Vegetation Restoration Area of Kunyang Phosphorite Mine

In order to understand the relationship between soil physical and chemical properties as well as biological charateristics of the various indicators in vegetation restoration area of Kunyang phosphoritemine, apatite plantations with eight different vegetation restoration years in Kunyang were selected to examine the soil thickness, bulk density, porosity and capillary porosity, water content, pH value, organic matter, alkali-hydro nitrogen, total nitrogen, total phosphorus, available phosphorus, available potassium, total potassium and soil microbial biomass carbon (MBC), microbial biomass nitrogen (MBN), nitrogen mineralization rate, beta glycosidase enzymes, acid phosphatase, urease, 4 typical variables were obtained through canonical correlation analysis for the relationship between 13 soil physicochemical property indexes and 6 soil biological character indexes, and the canonical correlation coefficients were 0.997 0, 0.988 9, 0.879 9 and 0.997 0, respectively, which have reached very significant level (p≤0.01).There were significant correlation between soil physical and chemical properties and biological properties. Organic matter and MBC, MBN were very significantly correlated, urease, effective phosphorus, total phosphorus and nitrogen mineralization rate and MBN, MBC were significantly correlated, alkali solution nitrogen, pH, MBC, MBN, urease were significantly related to total nitrogen and beta glycosidase enzymes, MBN, nitrogen mineralization rate were significantly related.