Asian Journal of Soil Science and Plant Nutrition, 2456-9682,Vol.: 1, Issue.: 4
Rice Yield Potential under Unfavorable Soil Ecosystems in Bangladesh
Jatish Chandra Biswas1, Md. Mozammel Haque1* and P. K. Saha1 1Soil Science Division, Bangladesh Rice Research Institute, Gazipur-1701, Bangladesh.
Jatish Chandra Biswas1, Md. Mozammel Haque1* and P. K. Saha1
1Soil Science Division, Bangladesh Rice Research Institute, Gazipur-1701, Bangladesh.
(1) Dr. Darmawan, Soil Science Department, Faculty of Agriculture, Andalas University, West Sumatra, Indonesia.
(1) A. Nanda, Jnana Sahyadri Kuvempu University, India And Biodiversity Education and Research Lab, Environmental Study Centre, India.
(2) Martín Maria Silva Rossi, Estudio Agronómico. Alvear 1244, 2600 Venado Tuerto. Santa Fe, Argentina.
(3) Rasmia Sayed Sayed Darwesh, Central Lab. for Research and Development of Date Palm. Agriculture Research Centre, Egypt.
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Unfavorable ecosystems in Bangladesh are under intense pressure of crop production and climate change impact; although the relationships of indigenous soil nutrients ratios with crop performance are yet to be fully explored. Experiments were conducted under submergence and cold prone areas (agricultural ecological zone, AEZ-3), drought and cold prone areas (AEZ-26), non-saline tidal flood ecosystem (AEZ-13), char and saline prone ecosystem (AEZ-18) and haor ecosystem (AEZ-21) for evaluating rice grain yield with native nutrients ratios. Synergistic and antagonistic relationships were observed in different AEZ depending on indigenous nutrient ratios. The Ca:P and N:Zn ratios were playing significant negative role with rice yield in wet season. In dry season, P:K ratio was acting antagonistically in AEZ-18, AEZ-3 and AEZ-26 but K:Mg, Ca:Zn S:Zn P:Zn were playing synergistic role in the same localities. The C:K ratio was playing antagonistic role with dry season irrigated rice yield in AEZ-13 and AEZ-21. Dry season irrigated rice grain yield was 13-27% lower in AEZ-26 than others AEZ because of variations in negative ratios of nutrients. Application of 187-13-75-15-1.1, 174-27-19-840, 162-11-58-11-0, 180-24-14-15-4 and 144-36-5-3-0 kg/ha of N-P-K-S-Zn, respectively for Rangpur, Rajshahi, Barisal, Sonagazi and Habiganj improved dry season rice yield significantly in all AEZ except AEZ-18 compared to indigenous soil fertility. Soil separates showed variable relationships with indigenous nutrient ratios in different AEZ. It is concluded that indigenous soil nutrient ratios play a vital role in improving rice yield under unfavorable ecosystems.
Agricultural ecological zone; native nutrient ratio; rice yield.
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