Comparison of Improvement Effect of Three Plants for Both Medicinal and Ornamental Uses on Coastal Saline-alkali Soil

27 Mar Comparison of Improvement Effect of Three Plants for Both Medicinal and Ornamental Uses on Coastal Saline-alkali Soil

View Original

Abstract

English Abstract

In order to compare the improvement effect of plants for both medicinal and ornamental uses on
coastal saline-alkali soil， one-year-old seedlings of Mentha haplocalyx Briq．， Sanguisorba officinalis L．
and Lycium chinense Mill． were cultivated by seedling cultivation method， and changes of pH value and
contents of soluble salt and main ions in different soil layers were comparatively analyzed． The results
show that pH value and contents of soluble salt， K+， Na+， Ca2+， Mg2+， Cl－ and SO4 2－ in 0－10， 10－20
and 20－30 cm soil layers all change in different degrees after planting three plants， and the changes in
0－10 cm soil layer are relatively obvious． And ion compositions in different soil layers also change． After
planting three plants， pH value in 0－10 and 10－20 cm soil layers and soluble salt content in 0－10 cm
soil layer all are lower than those of the control， in which， the reducing effects on pH value and soluble
salt content in soil for respectively planting S． officinalis and L． chinense are the most obvious． After
planting three plants， Ca2+ content in different soil layers and contents of K+ and Mg2+ in 10－20 and 20－
30 cm soil layers are extremely significantly higher than those of the control， and Na+ content in different
soil layers， Cl－ content in 0－10 cm soil layer and SO4 2－ content in 10－20 and 20－30 cm soil layers all
are extremely significantly lower than those of the control． And in different soil layers， K+ /Na+ values are
higher and ( K+ +Na+) /( Ca2+ +Mg2+) values are lower than those of the control， and total exchange capacity of main cationic ions ( Ca2+， K+ and Mg2+) increase obviously． Generally， the enhancing effects
of S． officinalis and L． chinense on contents of K+， Ca2+ and Mg2+， K+ /Na+ value and total exchange
capacity of main cationic ions ( Ca2+， K+ and Mg2+ ) ， and their reducing effects on Na+ content and
( K+ + Na+ ) /( Ca2+ + Mg2+ ) value all are stronger， while those of M． haplocalyx are weaker． It is
suggested that tested three plants for both medicinal and ornamental uses all have an obvious improving
role on saline-alkali soil， in which the improvement effects of L． chinense and S． officinalis are better．