Evaluation of Soil Physico-Chemical Properties in Pre and Post Flood Conditions at Thatta Sindh Pakistan

Journal of Applied Research in Plant Sciences Pub Date : 2023-05-26 DOI:10.38211/joarps.2023.04.02.101

M. Chohan, R. N. Panhwar, A. F. Soomro, Ghulam Mohyuddin Kaloi, A. H. Mari, I. B. Bhatti, M. A. Gadehi

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Abstract

The heavy rainfall caused biggest ever natural rain flood in River Indus in the history of Pakistan during 2010. The deltaic district Thatta of Sindh Pakistan hit by flood with breach came out at Dyke near Thatta city on right bank of River Indus. The soil sampling was carried out in month July 2010 prior to flood for routine soil analysis. After flood again soil samples from 13 same sites of pre flood spots were collected at two depths, 0-15 and 15-30 cm. Aim was to observe soil physic-chemical properties and nutrient status of pre-flood and post flood conditions. Soil sand pH and SAR were found significantly higher in post-flood conditions whereas clay and OM were found high in pre-flood conditions. The nutrients status of N, P, Ca and Mg were depleted however K remained satisfactory in post-flood conditions. In post flood conditions the pH and SAR were positive and significantly correlated with each other indicated disperse of soil. The information obtained from this study will be helpful to develop flood qualification strategies and proper management of soil.

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巴基斯坦信德省塔塔洪涝前后土壤理化性质评价

2010年，强降雨导致巴基斯坦历史上最大的印度河自然降雨洪水。巴基斯坦信德省塔塔三角洲地区遭受洪水袭击，印度河右岸塔塔市附近的堤坝出现决口。土壤取样于2010年7月洪水发生前进行常规土壤分析。再次洪水后，在洪水前13个相同地点的0-15 cm和15-30 cm两个深度采集土壤样品。目的是观察洪水前后土壤理化性质和养分状况。土壤砂的pH和SAR在洪水后显著升高，而粘土和OM在洪水前显著升高。灾后条件下，N、P、Ca、Mg等养分状态均出现了耗竭，而K保持良好状态。灾后土壤pH值与SAR值呈显著正相关，表明土壤分散程度较高。本研究所得的信息将有助于制定洪水定性策略和合理的土壤管理。

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Journal of Applied Research in Plant Sciences

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