Analysis of long term impact of cyclonic disaster ‘aila’ on soil properties and paddy yield of Sundarbans, West Bengal, India
Journal Title: Journal of Experimental Biology and Agricultural Sciences - Year 2016, Vol 4, Issue 0
Abstract
A field study was conducted to evaluate the long term impact of cyclonic disaster ‘Aila†on soil properties and paddy yield. Study was conducted during four consecutive rabi season started from 2009-10 onwards after the exposure of Aila at three highly Aila affected regions of Sundarbans viz Achintanagar (Patharprotima block), Kuemuri (Patharprotima block) and Shyamnagar (Kultali block) villages. Results of the study were compared to the adjoined non Aila affected area after soil test based fertilizer application (STNPK). Results of study revealed that Aila degraded the quality of paddy cultivation land by increasing EC 3 dSm-1 , ESP 18 and 2 to 2.7 times available iron over non Aila affected area along with completely failure of paddy production (average yield 0.45 t/ha) in 2009-10 season. Results of next consecutive three seasons revealed that soil pH, EC, ESP is improved and consequently paddy yield also increased naturally as compare to the yield of previous years in Aila affected area as well as yield of non Aila affected area in three villages. After third year of Aila occurrence, it was reported that paddy yield increase average 14% on application of extra 25%P2O5, average 8% on application of extra 25% K2O and average 15% on application of extra 25% NPK over STNPK (Soil test based NPK dose)treatment. These fertilizer treatments ultimately made yield gap between Alia affected and non Aila affected area after third year of Aila occurrence. This is perhaps due to extra P2O5 fulfilled the P requirement of paddy in Fe rich Aila affected soils and at the same time extra K2O increased availability of K to paddy by maintaining the activity ratio of K / √( Ca +Mg) in saline environment of Aila affected areas.
Authors and Affiliations
Sisir Kumar Si
Keywords
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