Vol. 12, Issue 3 (2023)

Author(s):
MM Patel, VA Patel, SL Pawar, HK Joshi and JM Patel

Abstract:
A field experiment was conducted during 2017-18 to 2019-20 at Coastal Soil Salinity Research Station, NAU, Danti-Umbharat, Gujarat to study the effect of organic amendments on growth and yield of different rice-based cropping system under coastal salt affected soils. The experiment was laid out in split-plot design with four replications. The treatments consisted of three levels of organic manure viz., O₁: No organic manure, O₂: Bio-compost @ 10 t/ha and O₃: Green manuring with dhaincha applied before kharif season crop in main plot and four different cropping sequences viz., C₁: Paddy-Fallow, C₂: Paddy-Sugar beet, C₃: Paddy-Gram and C₄: Paddy-Sorghum in sub-plots. The results of the study revealed that applications of organic manure have positive effect on rice crop and have residual effect on sugar beet, gram and sorghum crop. Application of bio compost @ 10 t/ha to rice crop recorded the highest value of all the growth, yield attributes and yield of rice crop in kharif season followed by green manuring with dhaincha. The residual effect on sugar beet, gram and sorghum in respect to all growth, yield attributes and yield was higher with bio-compost followed by green manuring with dhaincha. Similar trend was observed in paddy grain equivalent yield. In case of cropping sequences, treatment C₂ (Paddy-Sugar beet) recorded significantly higher paddy grain equivalent yield as compared to rest of the cropping sequences. The present study suggests that for achieving higher yield from rice based cropping sequence under coastal salt affected soils of South Gujarat, to adopt rice (kharif) - sugar beet (rabi) cropping sequences and apply bio compost @ 10 ton/ha to rice crop.