Lessen the salinity effect on rice production in salty regions of Bangladesh using organic amendment

Abstract

Most distressing ecological stress is salinity that reduced agrarian production. One of the main adaptation processes for plants to tolerate salinity is the accumulation of organic compounds. The main objective of the present study was to mitigate the adverse effects of soil salinity through organic amendments (wooden ash, rice straw, rice husk ash) in rice cultivation. The field experiment was conducted at the farmer's fields of Tala upazilla under Satkhira district with BINA dhan10, a saline tolerant rice variety in dry season. There were five treatment combinations with chemical fertilizers and different organic substances. Application of organic substances reduced the salinity which thus helps for physiological growth of rice. Wooden ash along with rice straw reduced the highest salinity among the treatments. The nutrient uptake of the different treatments was found better than the control plot and the highest is observed from treatment with ash and rice straw combination. The grain K+/Na+ ratio is found high in the entire organic treated plot. But the silicon (Si) uptake was better where rice husk ash was added. The cumulative effect of different organic amendments reflected in the yield contributing feathers and grain yield of rice. The highest yield was produced (5.81 t ha-1) from T2 (ash + rice straw) treatment although other treatments produced similar grain yield except T3 and T1. Apart from the study, the soil analysis express a little positive change in soil carbon content but other elements (N, P, K and S) are found almost similar due to one season crop cultivation. The combined effect of organic amendment reduced the stress caused by salinity on rice production in saline prone regions, which is advantageous for Bangladeshi farmers