盐碱地种植耐盐植物的脱盐效果

Desalination Effects of Salttolerant Plants Growing in Alkali-saline Soil in Ningxia

在宁夏银北盐碱地上种植耐盐植物红豆草、苜蓿、聚合草、小冠花、苇状羊茅的结果表明 ,种植耐盐植物具有明显的脱盐作用 ,可使盐碱地 0～ 2 0 cm、0～ 1 0 0 cm土层平均土壤脱盐率分别达 31 .1 %和 1 9.1 % ,可促进土壤团粒结构的形成 ,改善土壤理化性质 ,使土壤有机质、速效氮有所增加 ,直接经济效益分别为 2 4 6 1 6 .4、1 2 0 6 6 .0、74 73.0、72 0 9.0、2 80 0 .2元 / hm2 。

Results, obtained from salt resistant plants of Onobrychis viciifolia and Medicago sativa and Symphytum peregrinum Ledeb and Coronilla varia and Festuca Arundinacea Sehreb planted in saline and Alkaline Land in Ningxia,indicated that salt resistant plant desalinated significantly at average desalination rate of 31.1% and 14.6% in the soil depth of 0-20 and 0-100 cm,respectively.These plants can promote formation of soil aggregation,improve soil chemical and physical properties, and increase soil organic matter and available N content.Direct economic returns from these plants were 24 616.4,12 066.0,7473.0,7 209.0,and 2 800.2 Yuan in RMB hm^2,in the respective order.In addition, it will be high potential to develop livestock with salt resistant plants.