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Meta-Analysis Approach to Measure the Effect of Integrated Nutrient Management on Crop Performance, Microbial Activity, and Carbon Stocks in Indian Soils

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Title Meta-Analysis Approach to Measure the Effect of Integrated Nutrient Management on Crop Performance, Microbial Activity, and Carbon Stocks in Indian Soils
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Creator Rajeev Padbhushan, Sheetal Sharma, Upendra Kumar, DS Rana, Anshuman Kohli, Megha Kaviraj, Brajendra Parmar, Rajkishore Kumar, K Annapurna, Abhas Kumar Sinha and Vadakattu VSR Gupta
 
Subject Integrated nutrient management, Rice-wheat system, Soil texture, MBC, SOC, Microbial Quotient, CO2 equivalent emission
 
Description Not Available
Cereal crop production gains under conventional agricultural systems in India have been
declining in recent years because of inadequate management practices, creating a
considerable concern. These activities were shown to deplete soil organic matter
stocks, resulting in a decrease in microbial activity and soil organic carbon (SOC)
content. Moreover, even with minimal use of organic sources in cultivated land, soil
carbon status deteriorated, particularly in subtropical climates. Integrated nutrient
management (INM), a modified farming method, has the potential to effectively utilize
organic and inorganic resources, to improve the quality of soils and crops, and making
farming more economically viable and sustainable. The aim of this study was to use metaanalysis
to quantify the effects of INM on crop production, soil carbon, and microbial
activity in Indian soils. During the years 1989–2018, data from various research studies in
India, mainly on nutrient management in rice and wheat crops, were collected. Meta-Win
2.1 software was used to analyze the results, and significance was determined at p < 0.05.
The results showed that the yield of rice and wheat was 1.4 and 4.9% more in INM than
that in 100% NPK (N: nitrogen, P: phosphorous, and K: potassium), and that respective
yields were comparatively higher in loamy soils (2.8%) and clayey soils (1.0%). The INM
treatment increased SOC and microbial biomass carbon (MBC), resulting in improved
overall soil quality. The SOC stock was increased by 23.8% in rice, 15.1% in wheat, 25.3%
in loamy soils, and 14.4% in clayey soils in INM over 100% NPK. Microbial quotient (MQ)
data showed significant trends between different management systems in both soil types,
for example, INM > 100% NPK > No NPK. Due to more soil cracking and reduced
aggregate stability in the rice field (greater short-term soil structural changes), the SOC
stock loss in rice was higher than that in wheat. The CO2 equivalent emissions were
7.9 Mg ha−1 higher in no NPK (control) than in 100% NPK, and 16.4 Mg ha−1 higher
in control than in INM. In other words, INM increased soil carbon sequestration by 2.3 Mg ha−1 as compared to using 100% NPK. Overall, the findings of this study show that
INM could be a viable farming system mode in India for improving crop production,
increasing soil carbon sequestration, and improving microbial activity while remaining
economically and environmentally sustainable.
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Date 2022-03-31T04:47:10Z
2022-03-31T04:47:10Z
2021-10-11
 
Type Article
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/70935
 
Language English
 
Relation Not Available;
 
Publisher Frontiers in Environmental Science