四翅滨藜对初始含盐量不同的土壤吸盐效果分析比较

Analysis and Comparison of Salt-absorbing Effects of Atriplex Canescens on Soil with Different Initial Salt Content

研究四翅滨藜在初始含盐量和种植株数不同的土壤中吸盐效果,合理利用四翅滨藜改良盐碱地的土壤环境提供有效的参考。采用盆栽试验,将不同株数的幼苗分别种植于初始含盐量为4.94、10.02、21.09、39.14 g/kg的土壤中,分别标记为A、B、C、D土壤,观察其生长状况和土壤中的含盐量变化情况,在生长周期内每隔一个月测定一次土壤中的含盐量。结果表明,在A土壤中种植2株四翅滨藜的吸盐效果最好,在B、C土壤中种植3株吸盐效果最好,在D土壤中种植1株吸盐效果最好,说明种植株数的不同会影响四翅滨藜对盐碱地的吸盐效果。在4种土壤中各种植1株四翅滨藜时,在D土壤中吸盐效果最佳,在第一个月内降盐率达到33.80,但随后四翅滨藜枯死。在其他3种初始含盐量不同的土壤中四翅滨藜都能保持着正常生长,吸盐能力强弱依次为:B土壤>A土壤>C土壤,降盐率分别为23.25、17.61、15.17。多重比较结果表明,四翅滨藜在含盐量2以下的土壤中能生长正常,且对盐碱地有一定的改良能力。

In this paper,the salt absorption effect of atriplex canescens in the soil with different initial salt content and planting number was studied in order to provide an effective reference for the reasonable utilization of atriplex canescens to improve the soil environment in saline-alkali land.Pot experiment was used to plant seedlings with different number of plants in soil with initial salt content of 4.94,10.02,21.09 and 39.14 g/kg,respectively,which were labeled as soil A,B,C and D.Their growth status and changes in soil salt content were observed,and soil salt content was measured every other month during the growth cycle.The results showed that 2 plants planted in soil A had the best salt-absorbing effect,3 plants planted in soil B and C had the best salt-absorbing effect,and 1 plant planted in soil D had the best salt-absorbing effect,indicating that the different number of planted plants would affect the salt-absorbing effect of atriplex canescens on saline-alkali land.When one atriplex canescens was planted in each of the four soils,the salt absorption effect was the best in D soil,and the salt reduction rate reached 33.80%in the first month,but then the atriplex canescens withered.In the other three soils with different initial salt content,the atriplex canescens kept normal growth,and the salt-absorbing ability was as follows:B soil>A soil>C soil.Soil salinity reduction rates were 23.25%,17.61%and 15.17%,respectively.Multiple comparison results showed that the atriplex canescens could grow normally in the soil with less than 2%salt content,and had certain improvement ability to the saline-alkali soil.