| 冲水洗盐对滨海盐碱地盐分变化的影响 |
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| 作者单位： | ;1.中国水产科学研究院淡水渔业研究中心/农业农村部淡水渔业和种质资源利用重点实验室;2.中国水产科学研究院东海水产研究所中国水产科学研究院盐碱地渔业工程技术研究中心 |
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| 摘 要： | 【目的】改良盐碱地。【方法】通过引水冲刷的方法,研究盐碱地盐分因子的时空变化,采用常规理化分析方法对样点土壤的盐碱度进行分析,并比较土壤的阴阳离子和生态离子之间的相关性。【结果】随着冲洗的次数增多,土壤中SAR从11.87 mmol/L降到3.02 mmol/L,pH值(从8.47降到8.25,夏季盐碱因子量最低,而秋季为返盐期盐碱因子小幅增加;盐度量随着月份的增加而增加,10月份最大为8.30‰;EC和TDC呈先减小后增加的趋势,分别从982.67μS/cm到1 037.67μS/cm和491.33 mg/L到523.67 mg/L;上、中、下层土在不同月份间有差异。本试验盐碱离子主要是Na+、CL-构成,表现为CL->Na+>Mg2+>SO42->Ca2+>HCO3->K+>CO32-,SAR与Na+极显著正相关。【结论】减少土壤中Na+量对治理盐碱地具有极大的作用。
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| 关 键 词： | 盐碱土壤 引水冲洗 盐分离子 滨海盐碱地 |
Effects of Washing Salt by Washing Water on Salinity Variation in Coastal Saline and Alkaline Land |
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| Institution: | ,Freshwater Fisheries Research Center of Chinese Academy of Fishery Sciences/Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture and Rural Affairs,Research Center of Saline-alkali Land Fishery Engineering Technology, Chinese Academy of Fishery Sciences,East China Sea Fisheries Research Institute |
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| Abstract: | 【 Objective 】 The purpose of this paper is to study the temporal and spatial variation of salt factor in saline-alkali land by means of water diversion and scouring. 【Method】This paper selected Balitan, Tangshan, the worst-hit area of saline-alkali land, as the sample point, and conventional physical and chemical analysis were used to compared. 【Result】The SAR decreased from 11.87 mmol/L to 3.02 mmol/L, and the pH decreased from 8.47 to8.25. The content of salinity increased with the increase of month, and the maximum in October was 8.30‰. EC(P=0.05) and TDC(P<0.05) showed a trend of decreasing firet and then increasing, repectively, from 982.67 μS/cm to 1037.67 μS/cm, and 491.33 mg/L to 523.67 mg/L. The upper, middle and lower layers of soil varied in different months. In this experiment, salt and alkali ions were mainly composed of Na+ and CL-, and the content in turn was CL-﹥Na+﹥Mg2+﹥SO42-﹥Ca2+﹥HCO3-﹥K+﹥CO32-, and SAR was positively correlated with Na+. 【Conclusion】Reducing the content of Na+ in soil plays an important role in the treatment of saline-alkali land. |
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| Keywords: | saline-alkali soil flush wash water salt ion coastal saline-alkali land |
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