如何比较同一回归线的截距

Question

您好我做了一个混合效果模型，如下所示，我想比较摘要输出中的截距。

library (lme4)
seed3<-lmer(logvar~logmean+Gene*Stage+logmean*Stage+(1|Year)+(1|Location), data=data_pod_seed, REML=TRUE)
summary(seed3)
library(car)
Anova(seed3)


As results I got this:


    Fixed effects:
                          Estimate Std. Error t value
(Intercept)                0.70401    0.22749    3.23
logmean                    1.65606    0.01845   84.32
GeneRag1                   0.07302    0.04273    1.71
GeneRag1+Rag2             -0.13085    0.05524   -2.37
StageFLOWER               -0.32120    0.05885   -5.46
StagePOD                  -0.68914    0.07782   -8.86
StageSEED                 -0.83973    0.09092   -9.24
GeneRag1:StageFLOWER       0.12829    0.07173    1.79
GeneRag1+Rag2:StageFLOWER  0.14218    0.08513    1.67
GeneRag1:StagePOD          0.12122    0.06687    1.81
GeneRag1+Rag2:StagePOD     0.24638    0.10207    2.41
GeneRag1:StageSEED         0.11211    0.08852    1.27
GeneRag1+Rag2:StageSEED    0.39355    0.10815    3.64
logmean:StageFLOWER        0.09845    0.03508    2.81
logmean:StagePOD           0.20310    0.03381    6.01
logmean:StageSEED          0.33243    0.04055    8.20

我想做一个Wald测试来比较固定效果的参数，看它们是否彼此不同。（例如：拦截StagePOD）。我怎么能用R做到这一点？