Table 4 Selection of optimal calcium concentration for tested alfalfa varieties

germination rate

1

0.167

0.833

0

germination potential

0.731

0.038

1

0

germination index

1

0.520

0.467

0

vitality index

1

0.944

0.688

0

root length

0.628

1

0.534

0

bud length

0.697

1

0.722

0

dry weight

1

0.898

0.571

0

relative water content

1

0.920

0.532

0

MDA

0

0.081

1

0.160

POD

1

0.388

0.238

0

CAT

0

0.473

0.701

1

SOD

0.327

1

0

0.519

Pro

0

0.726

0.693

1

soluble sugar

0

1

0.6

0.6

Comprehansive evaluation

0.599

0.654

0.613

0.234