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Impact of Elevated CO2 on Soil–Plant Phosphorus Dynamics, Growth, and Yield of Chickpea (Cicer arietinum L.) in an Alkaline Vertisol of Central India

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Title Impact of Elevated CO2 on Soil–Plant Phosphorus Dynamics, Growth, and Yield of Chickpea (Cicer arietinum L.) in an Alkaline Vertisol of Central India
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Creator Not Available
 
Subject Aboveground P accumulation · Open-top chamber · Photosynthesis rate · Soil P pools · Soil enzymes activities · Subtropical climate
 
Description Not Available
The increasing atmospheric [
CO2] would alter soil–plant nutrient dynamics depending on crop species, soil type, and climate.
Insights on the impacts of the predicted level of elevated [
CO2] (e[CO2]) on the soil–plant-environment system are,
therefore, important for strategic nutrient management for future environments. The impacts of e[CO2] environment on soil
phosphorus (P) bioavailability and soil–plant P dynamics in chickpea are uncertain in tropical alkaline Vertisols. An open-top
chamber–based experiment with e[CO2] (570 ± 30 ppmv) and ambient [
CO2] treatments aimed to investigate the impacts of
e[CO2] on soil–plant P dynamics, physiology, and yield of chickpea in a moderately alkaline Vertisol of subtropical central
India. Experimental findings revealed that the e[CO2] treatment increased Olsen P at flowering stage ( + 13%, p < 0.05),
water-soluble carbon (11–14%), and KMnO4-
C (5–14%) at both branching and flowering stages (p < 0.05). Results demonstrated
that the increased mobilization of dissolved non-reactive P (
NaHCO3-Po, NaOH-Po) (from branching to flowering)
and competitive sorption with higher soluble carbon possibly contributed to the higher available P (Olsen P) under the
e[CO2] environment. The e[CO2] treatment had a significant impact on photosynthetic rate ( + 5.3%), stomatal conductance
(− 16.5%), and leaf chlorophyll content ( + 5.1%) over the ambient (p < 0.05) but did not alter leaf nitrate reductase activity.
The e[CO2] treatment increased plant biomass ( + 25%) and productivity ( + 11.6%), P uptake ( + 16.6%), and physiological
P use efficiency ( + 7.1%) (p < 0.05). Thus, it can be concluded that e[CO2] (~ 570 ppmv) could enhance P availability in
alkaline Vertisols of subtropical regions favoring P nutrition, physiological activity, and yield of chickpea.
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Date 2024-05-03T10:07:02Z
2024-05-03T10:07:02Z
2022-01-08
 
Type Research Paper
 
Identifier Not Available
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http://krishi.icar.gov.in/jspui/handle/123456789/82587
 
Language English
 
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Publisher Not Available