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ÓÃRÓïÑÔ×öRDA·ÖÎö£¬·ÖÎö»·¾³Òò×ÓÓëÎïÖÖµÄÏà¹ØÐÔ¡£ÓÐ27µÄÑù±¾£¬31¸öÎïÖÖ£¬14¸ö»·¾³Òò×Ó¡£µ«ÊÇ×îºóÊä³öµÄ»·¾³Òò×ÓµÃ·Ö±í¡°Biplot scores for constraining variables¡±Ö»Ê¼ÖÕÖ»ÏÔʾ13¸ö»·¾³Òò×ÓÊÇʲôÇé¿ö£¿£¡ÈçÏÂͼ£º
Biplot scores for constraining variables

             RDA1     RDA2    RDA3     RDA4     RDA5     RDA6
pH        0.72821 -0.19612  0.1184  0.19122  0.08395  0.10733
OM        0.38554  0.47874  0.1181 -0.02857  0.11498 -0.48776
TN        0.73116  0.33364  0.2177 -0.03100  0.07174 -0.34673
TP       -0.04849 -0.41308 -0.1871 -0.15836 -0.08927  0.05022
TK        0.75387  0.45720  0.2316 -0.03594 -0.03442 -0.05298
AP       -0.41504 -0.48984 -0.2201 -0.13396  0.02101  0.01788
AK        0.70815  0.27989  0.2048 -0.41873  0.05153  0.02965
ExcMg     0.72558  0.40693  0.4657 -0.10105 -0.05075 -0.11044
ExcCa     0.81450  0.40690  0.3104  0.02167  0.14413 -0.09215
FDA      -0.21766  0.10116 -0.1157  0.16324 -0.15685 -0.28438
Urcase   -0.28503 -0.31898  0.2723  0.14498 -0.22572  0.18274
Sucrase   0.02602  0.08977  0.3645 -0.23123  0.21854  0.27002
Catalase  0.13714  0.23087  0.1453 -0.09459  0.02836  0.15450
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Call:
rda(formula = spp ~ pH + OM + TC + TN + TP + TK + AP + AK + ExcMg +      ExcCa + FDA + Urcase + Sucrase + Catalase, data = fcc)

Partitioning of variance:
              Inertia Proportion
Total         0.08118     1.0000
Constrained   0.04649     0.5727
Unconstrained 0.03469     0.4273

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