大麦对盐碱性防护林地改良效果分析

Improvement Effect of Barley on Saline-Alkali Shelter-forest Soil

通过盐碱性防护林地播种大麦的试验,结果表明：夏季高温干旱＂返盐碱＂期间,防护林地播种大麦,其土表（0~20 cm）层可溶性盐分和pH值分别比未实施播种大麦的平均降低0.9 g·kg-1和0.4;有机质、水解氮、有效磷和速效钾的平均含量分别比未实施播种大麦的增加5.4 g·kg-1、106.6 mg·kg-1、15.1 mg·kg-1和77.3 mg·kg-1,且土壤没有出现＂返盐碱＂（发白）现象;这种方法可有效防止盐碱地上营造的防护林在高温干旱季节土壤＂返盐碱＂,改善林地的土壤条件,在实际工作中可推广应用。

Through experiments of sowing barley on saline-alkali shelter-forest soil,result shows that during ＂return saline-alkali＂ period in summer with high temperature drought,soluble salt pH value in the soil surface（0-20 cm） layer on shelter-forest soil planted with barley are average 0.9 g·kg-1 0.4 lower respectively than that on shelter-forest soil planted without barley;average contents of organic matter,hydrolysis nitrogen,available phosphorus available potassium are respectively 5.4 g·kg-1,106.6 mg·kg-1,15.1 mg·kg-1 77.3 mg·kg-1 higher than that in the soil of shelter-forest planted without barley;soil doesn＇t appear ＂ return saline-alkali ＂（white） phenomenon;this method can effectively prevent ＂ return saline-alkali ＂of shelter-forest afforested on saline-alkali soil in high temperature drought season and improve forest soil conditions;it should be popularized in actual work.