Organic Amendments Boost Soil Fertility and Rice Productivity and Reduce Methane Emissions from Paddy Fields under Sub-Tropical Conditions

Md Mahamudul Haque, Juel Datta, Tareq Ahmed, Md Ehsanullah, Md Neaul Karim, Mt. Samima Akter, Muhammad Aamir Iqbal, Alaa Baazeem, Adel Hadifa, Sharif Ahmed and Ayman EL Sabagh
Additional contact information
Md Mahamudul Haque: Department of Environmental Science, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh
Juel Datta: Entomology Division, Bangladesh Rice Research Institute, Gazipur 1701, Bangladesh
Tareq Ahmed: Department of Plant Pathology and Seed Science, Sylhet Agricultural University, Sylhet 3100, Bangladesh
Md Ehsanullah: Faculty of Agriculture, Government Shahid Akbar Ali Science and Technology College, Thakurgaon 5140, Bangladesh
Md Neaul Karim: Department of Genetics and Plant Breeding, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706, Bangladesh
Mt. Samima Akter: Department of Genetics and Plant Breeding, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706, Bangladesh
Muhammad Aamir Iqbal: Department of Agronomy, Faculty of Agriculture, University of Poonch Rawalakot, Rawalakot 12350, Azad Jammu and Kashmir, Pakistan
Alaa Baazeem: Department of Biology, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
Adel Hadifa: Rice Research and Training Center (RRTC), Field Crops Research Institute, Agricultural Research Center, Sakha, Kafr El-Sheikh 33717, Egypt
Sharif Ahmed: International Rice Research Institute, Dhaka 1213, Bangladesh
Ayman EL Sabagh: Department of Agronomy, Faculty of Agriculture, University of Kafreilsheikh, Kafr El-Shaikh 33516, Egypt

Sustainability, 2021, vol. 13, issue 6, 1-12

Abstract: Deteriorating soil fertility and gradually decreasing rice productivity along with higher greenhouse gas emissions from paddy fields have emerged as serious threats to the sustainability of rice production and food security. Rice production in the subtropical environment in Bangladesh is mostly dependent on synthetic inorganic fertilizer to maintain productivity; however, the inorganic fertilizer has negative effects on global warming. Climate-smart and resilient agricultural production systems are major concerns nowadays to meet sustainable development goals. The study was conducted to evaluate the optimum rate and source of organic amendments on rice productivity and soil fertility along with CH 4 emission. A total of nine nutrient combinations were used in the study. The CH4 emission, soil redox potential (Eh), soil pH, soil nitrogen and organic carbon, available phosphorus, rice grain and straw were greatly affected by the application of different rates and sources of the nutrient. However, the soil exchangeable K content, plant height, and harvest index were not affected. Among the treatments, the application of 75% recommended fertilizer (RF) + biosolid 2 t ha−1 (T3) was the most effective and showed the superior performance in terms of available P (12.90 ppm), the number of grains panicle −1 (121), and 1000-grain weight (24.6g), rice grain, and straw yield along with the moderate CH 4 emission (18.25 mg m −2 h −1 ). On the other hand, the lowest soil Eh (−158 mV) and soil pH (6.65) were measured from the treatment T3. The finding of this study revealed that the application of 75% of RF + biosolid 2 t ha −1 can be recommended as the preferable soil amendment for boosting rice yield, reduce CH 4 emissions, and sustainably maintain soil fertility. Furthermore, this finding may help to introduce preferable soil amendment doses, which will contribute to boosting rice productivity and economic turnouts of the farmers.

Keywords: gaseous emissions; soil fertility; rice; organic amendments (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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