AUTHOR=Upadhyay Pravin Kumar , Sen Avijit , Singh Yashwant , Singh Ram Kumar , Prasad Saroj Kumar , Sankar Ardith , Singh Vinod Kumar , Dutta S. K. , Kumar Rakesh , Rathore Sanjay Singh , Shekhawat Kapila , Babu Subhash , Singh Rajiv Kumar , Kumar Bipin , Dey Abir , Rajanna G. A. , Kulshekaran Ramesh 

TITLE=Soil Health, Energy Budget, and Rice Productivity as Influenced by Cow Products Application With Fertilizers Under South Asian Eastern Indo-Gangetic Plains Zone

JOURNAL=Frontiers in Agronomy

VOLUME=3

YEAR=2022

URL=https://www.frontiersin.org/journals/agronomy/articles/10.3389/fagro.2021.758572

DOI=10.3389/fagro.2021.758572

ISSN=2673-3218

ABSTRACT=<p>The comprehensive use of organic, inorganic, and biological components of nutrient management in rice ecologies can potentially address the twin challenges of declining factor productivity and deteriorating soil health. A field study was thus conducted at Varanasi, India during the year 2013–14 and 2014–15 to assess the effect of the recommended dose of fertilizers (RDF) along with cow product (blends of 5 cow by-products i.e., dung, ghee, curd, urine, and milk that is known as <italic>panchagavya</italic>) on soil health, energy budget, and rice productivity. The results revealed that the inclusion of <italic>panchagavya as</italic> seedling root dip + 6% spray at 30 days after transplanting (DAT) + an application with irrigation water (15 l ha<sup>−1</sup>) at 60 DAT (D<sub>4</sub>) along with 100% RDF (F<sub>3</sub>) noted significantly higher rice grain yield (6.34 t ha<sup>−1</sup>) and higher dehydrogenase activity. However, the soil bacterial and actinomycetes population, soil microbial biomass carbon (SMBC), urease, and alkaline phosphatase activities were significantly higher with D<sub>4</sub> along with 120% RDF (F<sub>4</sub>). Carbon output (5,608 kg CO<sub>2</sub> eq ha<sup>−1</sup>), energy use parameters <italic>viz</italic>. energy output (187,867 MJ ha<sup>−1</sup>), net energy returns (164,319 MJ ha<sup>−1</sup>), and energy intensity valuation (5.08 MJ <inline-graphic xlink:href="fagro-03-758572-i0001.tif" xmlns:xlink="http://www.w3.org/1999/xlink" />) were significantly higher under F<sub>4</sub>. However, the energy ratio (8.68), energy productivity (0.292 kg MJ<sup>−1</sup>), and energy profitability (7.68) remained highest with 80% RDF (F<sub>2</sub>), while the highest carbohydrate equivalent yield (4,641 kg mha<sup>−1</sup>) was produced under F<sub>3</sub>. The combination of F<sub>3</sub> with D<sub>4</sub> resulted in the highest productivity, optimum energy balance, and maintaining soil quality. Therefore, a judicious combination of cow product (<italic>panchagavya)</italic> with RDF was found to improve the rice productivity, energy profitability, and soil quality under south Asian eastern Indo-Gangetic Plains (IGPs).</p>