|
|
|
| Effects of salt-resisting water retentive agent on physiology and survival rate of Acacia crassicarpa in coastal sandy soil |
| Lin Jie |
| Fujian Institute of Subtropical Botany,361006,Xiamen,Fujian,China |
|
|
|
|
Abstract The effects of salt-resisting water retentive agent on growth physiology and survival rate of Acacia crassicarpa in coastal sandy soil were studied.The results showed that it had no significant effects on physiological indexes when 1 000-2 000 g salt-resisting water retentive agent to each seedling was used.However,when 3 000-4 000 g salt-resisting water retentive agent to each seedling was used,enough rainwater could be absorbed and stored by soil.So more rainwater would be supplied for seedling during drought period,which would decrease drought stress to seedling and it would increase the water potential,water content and chlorophyll content of leaves.In addition,it would keep root vigor and maintain the root peroxidase(POD).Compared with CK,the height,DBH and crown width of seedling increased 0.52-0.74 m,0.6-0.8 cm and 15-25 cm,respectively.The survival rate and preserving rate increased 26.9%-32.2% and 20.1%-36.5%,respectively.
|
|
Received: 01 April 2009
|
|
|
|
|
null
|
|
null
|
|
|
|
