| 许毅,徐彦虎,林启美,李贵桐,赵小蓉.羊草和脱硫石膏对内蒙古河套地区盐渍化土壤的改良效果[J].干旱地区农业研究,2015,33(4):112~116 |
| 羊草和脱硫石膏对内蒙古河套地区盐渍化土壤的改良效果 |
| Effects of Aneurotepidimu chinense and desulfurization gypsum on the amelioration of Na2SO4 saline soil in Hetao Inner Mongolia |
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| DOI：10.7606/j.issn.1000-7601.2015.04.18 |
| 中文关键词: 羊草 脱硫石膏 盐渍化土壤 |
| 英文关键词:Aneurotepidimu chinense desulfurization gypsum saline soil |
| 基金项目:国家十二五科技支撑计划项目“ 河套地区盐碱地耐盐植物高效利用与生态修复模式研究与示范”(2013BAC02B06) |
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| 中文摘要: |
| 为了解脱硫石膏和耐盐植物改良与培肥盐渍化土壤的作用与效果,在内蒙古河套地区硫酸盐盐渍化土壤上设置田间试验，测定施用脱硫石膏(30 t·hm-2)与不施用脱硫石膏并种植羊草后土壤盐分及基础理化性质的变化。结果表明：春季灌溉可大幅度降低土体pH值、电导率（EC）和盐分离子浓度，施用脱硫石膏可加快降低土壤碱度，主要盐分离子Na+和SO42-分别降低了80%和39%以上，但EC略有提高，导致养分淋失；羊草对脱硫石膏有良好的反应，生物量提高了30%，但全磷含量降低了22%，全氮、全钾含量没有显著变化；种植羊草降低Na+和SO42-含量至3.38 mg·kg-1和132.27 mg·kg-1，且土壤有机质和碱解氮含量分别提高了12%和37%，同时施用脱硫石膏效果更好一些。说明脱硫石膏与羊草之间具有一定的相互作用，可加速盐渍化土壤改良的进程，但需要注意的是应适当增加施用P、K肥料，以补充养分不足。 |
| 英文摘要: |
| To address the positive impacts of desulfurization gypsum and halophytes on saline soils, a field experiment was set up in a Na2SO4 saline soil of Hetao Inner Mongolia. Desulfurization gypsum was added into the soil and then Aneurotepidimu chinense were planted. The monitored parameters included salts and basic soil properties. The results showed that spring irrigation largely reduced the levels of pH, electrical conductivity (EC) and salt ions in all soil layers. Adding desulfurization gypsum resulted in further reduction of alkalinity. The main ions of Na+ and SO42- were reduced by more than 80% and 39%, respectively. However, the addition induced the increases of EC value and nutrient leaching. Aneurotepidimu chinense had a good positive response to desulfurization gypsum, increasing dry matter by 30%. But phosphorus content in plant tissues was decreased by 22%. The contents of N and K in plant tissues were not significantly influenced by adding desulfurization gypsum. Aneurotepidimu chinense cultivation resulted in significant decreases of Na+ and SO42- in soil to 3.38 and 132.27 mg·kg-1, respectively, but increases of soil organic matter and alkaline-released N by 12% and 37%, respectively. The better improvement on soil fertility was obtained when Aneurotepidimu chinense was grown along with the addition of desulfurization gypsum. It was evident that there was a positive interaction between Aneurotepidimu chinense and desulfurization gypsum, which accelerated the amelioration of saline soil. Additionally, it should be noticed that addition of PK fertilizers might be needed to compensate loss of soil available P and K nutrients. |
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