PERFORMANCE OF LENTIL UNDER RICE RESIDUE RETENTION AND TILLAGE AS A CLIMATE CHANGE ADAPTATION TECHNOLOGY

Abstract

Bangladesh is one of the most climate vulnerable countries in the world. Climate change accelerated the intensity and frequency of occurrences of drought, irregular rainfall, high temperature etc that directly and indirectly related to crop production. A field experiment was carried out at Pulses Research Sub-station, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur, during the period from November, 2016 to March, 2017 to study the soil moisture, growth and yield of lentil with rice residual retention and tillage as a climate change adaptation technology. The experiment consisted of two factors as two residue retention viz., 15 cm residue retention, 45 cm residue retention and three conservation tillage viz., zero tillage, conventional tillage and strip tillage The experiment was laid out into Randomized Complete Block design (RCBD) with three replications. Experimental results showed that residue retention had significant effect on moisture content of soil, growth and yield parameters except 1000 seeds weight. The seed yield (1.29 ton ha ii

. ), moisture content, growth parameters and all other yield parameters were higher at 45 cm residue retention. Different tillage also significantly influenced on moisture content of soil, growth and yield parameters for all the parameters of lentil. The results revealed that zero tillage produced maximum soil moisture content and highest seed yield (1.36 ton ha -1 ) and strip tillage produced the lowest seed yield (1.04 ton ha ). In case of interaction effect of residue retention and different tillage, maximum soil moisture content found from 45 cm residue retention + zero tillage. The maximum number of pods per plant (55.33) and seeds per pod (2.04) was obtained from 45 cm residue retention + zero tillage. The highest seed yield (1.47 ton ha -1 ) also observed in 45 cm residue retention + zero tillage. So, zero tillage with rice straw retention has a significant effect on soil moisture and crop yield.