Abstract
This study was conducted to evaluate the effect of integrated use of organic and inorganic nitrogen (N) sources on rice-wheat yield and yield parameters, soil organic carbon content and nitrate leaching. Fourteen treatments viz: control (No NPK), 100% N through fertilizer (Recommended NPK), 100% N through FM, 100% N through press mud, 100% N through poultry litter, 75% N through fertilizer + 25% N through FM, 75% N through fertilizer + 25% N through press mud, 75% N through fertilizer + 25% N through poultry litter, 50% N through fertilizer + 50% N through FM, 50% N through fertilizer + 50% N through press mud, 50% N through fertilizer + 50% N through poultry litter, 25% N through fertilizer + 75% N through FM, 25% N through fertilizer + 75% N through press mud, 25% N through fertilizer + 75% N through poultry litter were tested. All o rganic manures were well mixed in soil before filling the pots. The results indicated that maximum plant height, number of tillers, number of grains per spike/panicle, 1000 grains weight and paddy/grain yield was obtained in treatment where 75% N through chemical fertilizers and 25% N through poultry litter was applied. The highest soil organic carbon after the harvest of rice and wheat was obtained in treatment where 100% N was applied through farm manure while soil nitrate was maximum in treatment where 75% N through chemical fertilizers and 25% N through poultry litter was applied. The study conjectured that combination of chemical fertilizers and poultry litter (75:25) proved best in comparison with other integrations and sole applications
Shakeel Ahmad Anwar, Muhammad Iqbal, Anwar-ul-Hassan, Ehsan Ullah. (2015) Growth and yield of rice-wheat in response to integrated use of organic and inorganic N sources, The Journal Soil & Environment , Volume 34, Issue 2.
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