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滨海盐渍土脱盐动态规律及其效果评价——野外灌水脱盐模拟实验研究(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2002年04期
Page:
15-18
Column:
研究论文
publishdate:
1900-01-01

Article Info:/Info

Title:
The Dynamic Law of Coastal Salinized Soil Desalting and Its Effect Evaluation ——A Study on Leaching Process Through Simulation Experiment in the Field
Article ID:
1000-2006(2002)04-0015-04
Author(s):
YIN Jian dao 1 JIANG Zhi lin 1 CAO Bin 2 YANG Yong 2 HAIBARA Kikuo 3
1.Nanjing Forestry University,Nanjing 210037,China;2.Highway Bureau of Binzhou District,Shandong Province,Binzhou 256614,China;3.Tokyo University of Agriculture and Technology,Tokyo,Japan
Keywords:
Coastal salinized soilWater and salt movementSoil improvementSoil desalting laws
Classification number :
S156
DOI:
10.3969/j.jssn.1000-2006.2002.04.004
Document Code:
A
Abstract:
A bulk soil column desalting experiment was carried out and the soil salt and ion compositions before leaching were analyzed in contrast with those after leaching.Then the dynamic law of salt water movement of coastal salinized soil was analyzed and the approximate amount of water required in leaching was suggested.Finally the effect of desalting was tested and evaluated.The study provided important database for the improvement and utilization of coastal salinized soil.The results showed that with the increase of water amount,the upper layer of the soil desalts quickly,while the middle and the base layers desaltation occur after the salt peak.The formation,movement and disappearance of the salt peak show the dynamic characters of the soil salt movement.The deeper the soil is,the slower is the moving speed of the salt peak and the longer is the duration period.Therefore,it is more difficult to desalt.The order in which the cations are desalted from easy to difficult is:Mg 2+ >Na + >Ca 2+ >K + ,while the anions order is:Cl - >SO 2- 4>HCO - 3.However,the content of HCO - 3 becomes higher after desalting of about 111.8%~142.7%.The pH of soil increares about 1 unit,the fertility of the soil decreases in some aspects.Therefore,the application of fertilizer,the improvement of the soil,and controling soil and getting rid of alkalines are all essential measures.

References

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Last Update: 1900-01-01