【摘要】 1987和1989年,利用1、2年生胡杨苗,在水培条件下,通过电导率仪控制培养液浓度,对受盐害苗木进行了分析。研究结果表明,几种盐对苗木危害的排序是:Na₂CO₃>NaHCO₃>NaCl>CaSO₄>MgSO₄>以NaCl为主的盐渍皮。CaSO₄对苗木没有毒害作用。1年生苗比2年生苗受盐害后症状明显,但总的趋势是一致的。蒸馏水催根苗木,在蒸馏水中加盐后死亡浓度是:Na₂CO₃ 0.05％、NaHCO₃ 0.07％、NaCl 0.17％、CaSO₄ 0.7％、MgSO₄ 1.9％、以NaCl为主的盐渍皮3.5％。0.1％相应盐水催根苗在盐水培养液中加盐后,抗盐极限提高到:NaCl1.1％、MgSO₄ 3.5％、NaCl为主的盐渍皮3.7％。说明胡杨幼苗经过抗盐处理后,可以显著地提高抗盐害能力。更多还原

【Abstract】 In 1987 and 1989, study and analysis on the salt-harmed Populus euphratica Oliv. had been conducted by using one to two years old stocks, under the condition of water-culture with the salt concentration controlled by a conductivity meter. The results show that the order of harmful salt on stocks are Na2CO3>NaHCO3>NaCl>CaSO4>MgSO4>salinized soil covers composed of NaCl mainly; CaSO4 did no harm to the stocks. The symptoms were clearer on one years old stocks than those on two years old stocks when they were harmed by salts, but the general trends were the same. When salts were added into distilled water, the solutions killed the stocks, which grew new roots in distilled water, were 0.05 % Na2CO3, 0.07 % NaHCO3, 0.17% NaCl, 0.7%CaSO4,1.9%MgSO4 and 3.5% salinized soil covers composed of NaCl mainly. When salts were added into the salt water, the salt-resistance index of stocks which grew new roots in salt water could be raised to 1.1 % NaCl, 3.5 % MgSO4 and 3.7 % salinized soil covers composed of NaCl mainly. It shows that the salt-resistance ability of the stocks can be raised significantly after they are treated by salt-resistance treatment.更多还原