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Effect of elevated carbon dioxide on growth, nutrient partitioning, and uptake of major nutrients by soybean under varied nitrogen application levels
Author(s) -
Lenka Narendra K.,
Lenka Sangeeta,
Singh K. K.,
Kumar Ajay,
Aher Satish B.,
Yashona Dharmendra Singh,
Dey Pradip,
Agrawal Pawan Kumar,
Biswas A. K.,
Patra Ashok Kumar
Publication year - 2019
Publication title -
journal of plant nutrition and soil science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 87
eISSN - 1522-2624
pISSN - 1436-8730
DOI - 10.1002/jpln.201800488
Subject(s) - nutrient , carbon dioxide , chemistry , nitrogen , zoology , biomass (ecology) , yield (engineering) , human fertilization , agronomy , biology , organic chemistry , materials science , metallurgy
Abstract Rising carbon dioxide (CO 2 ) concentration causes fertilization effects resulting in enhanced crop biomass and yields and thus likely enhances nutrient demand of plants. Hence, this field study was carried out to investigate the effects of elevated CO 2 and N on biomass yield, nutrient partitioning, and uptake of major nutrients by soybean ( Glycine max L.) using open‐top chambers (OTCs) of 4 m × 4 m size. Soybean was grown in OTCs under two CO 2 [ambient and elevated (535 ± 36.9 mg L −1 )] and four N levels during July to October 2016. The four N levels were N 0 , N 50 , N 100 , and N 150 referring to 0, 50, 100, and 150% recommended dose of N. Both CO 2 and N significantly affected biomass and grain yield, though the interaction was non‐significant. CO 2 enrichment produced 30–65% higher biomass and 26–59% higher grain yield under various N levels. As compared to the optimum N application (N 100 ), the CO 2 ‐mediated increment in biomass yield decreased with either lower or higher N application, with the response being lowest at N 150 . As compared to ambient concentration, elevated CO 2 resulted in significant reduction of seed P concentration at all N application levels but at N 150 , an opposite trend was observed. The decrease in seed P was maximum at N 0 and N 50 (7–9%) and by 3% at N 100 , whereas there was a gain of 7.5% at N 150 . The seed N and K concentrations were not affected either by CO 2 or N application. Total N, P, and K uptake at harvest were significantly affected by CO 2 and N, but not by CO 2 × N interaction. Elevated CO 2 resulted higher uptake of N by 18–61%, P by 23–62%, and K by 22–62% under various N treatments.