重度盐碱地营造杨树人工林土壤改良效果

为探讨重度盐碱地营造杨树人工林对土壤的改良效果,本实验以黑龙江省肇东市重度盐碱地作为研究对象,采用小穴改良"一字沟"觅食丘式原位修复、小穴改良"十字沟"觅食台式原位修复和小穴改良"井字沟"觅食坛式原位修复的方法对重度盐碱地进行改良。研究结果表明:实施不同改良措施后土壤特性发生了显著变化,土壤pH值、电导率含量显著下降;土壤碳酸根含量显著下降,交换性钙、镁含量显著提高;土壤胡敏酸和壳聚糖含量明显提高,土壤肥力增加。因此,本研究所采用的三种不同的改良措施具有良好的改良效果。

Effect of Poplar Plantation on Soil Amelioration in Severe Saline-alkali Soil

In order to investigate the effect of constructing poplar plantation on soil amelioration,the severe saline-alkali soil of Zhaodong City,Heilongjiang Province was studied.The 4 treatments were CK(Control),Bar treatment(Small hole improvement-Bar foraging ditch-In situ repair),Cross treatment(Small hole improvement-Cross foraging ditch-In situ repair) and Grid treatment(Small hole improvement-Grid form of foraging ditch-In situ repair),respectively.The results of the present study showed that the different improvement treatments changed the severe saline-alkali soil characteristics,significantly decreased the pH value,conductivity and carbonate content in soil surface(p<0.05).Meanwhile,the exchange of calcium and magnesium ion contents,and the humic acid and chitosan contents were significantly increased(p<0.05).Therefore,the 3 different treatments,based on Small hole improvement and In situ repair,had well modified effects for the severe saline-alkali soil.