Influence of trees leaf green manuring on low land rice (Oryza sativa) productivity in mid-altitudes of Meghalaya
2011
Tomar, J.M.S. | Das, Anup
Field experiments were conducted in the kharif seasons for three years (2003–04, 2004–05 and 2005–06) at ICAR Research Complex for NEH Region, Umiam, Meghalaya (950m msl) to study the effect of green leaf manuring (GLM) on soil fertility and productivity of lowland rice (Oryza sativa L.). Green leaves of Erythrina indica Lamk., Acacia auriculiformis A. Cunn. ex Benth., Alnus nepalensis D. Don., Parkia roxburghii G. Don. and Cassia siamea Lam. were applied @ 10 t ha⁻¹ on fresh weight basis as green manure and compared with recommended NPK (80:60:40 kg ha⁻¹) and control. In first year and second year, yield attributes and yield of rice were highest with the recommended NPK (4.82 t ha⁻¹ in 2003 and 5.08 t ha⁻¹ in 2004, respectively) followed by E. indica. In the third year, GLM surpassed the recommended NPK in terms of growth, yield and yield attributes except alder leaves, the highest response being observed with the incorporation of Erythrina leaves (grain yield 4.44 t ha⁻¹). At the end of the three cropping cycles, there was significant improvement in soil organic carbon content, soil available nitrogen and phosphorus due to various green leaf manure applications indicating the suitability of green leaf manuring in hills as a means of soil health augmentation.
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