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Biopolymeric superabsorbent hydrogels enhance crop and water productivity of soybean–wheat system in Indo-Gangetic plains of India.

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Title Biopolymeric superabsorbent hydrogels enhance crop and water productivity of soybean–wheat system in Indo-Gangetic plains of India.
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Creator Not Available
 
Subject Environmental crises, shrinking natural, agricultural sustainability, Indo-Gangetic
 
Description Not Available
Environmental crises, declining factor productivity, and shrinking natural resource is a threat to global
agricultural sustainability. The task is much more daunting in the Indo-Gangetic northern plains of
India, where depletion of the underground water table and erratic rains due to the changing climate
pose a major challenge to agriculture. To address these challenges a feld investigation was carried
out during 2016–2018 to test the efcacy of biopolymeric superabsorbent hydrogels namely Pusa
Hydrogel (P-hydrogel: a semi-synthetic cellulose derivative-based product) and kaolin derivative of
Pusa Hydrogel (K-hydrogel: semi-synthetic cellulose derivative) to assess their efect on crop and
water productivity, soil moisture, root dynamics, and economics of soybean (Glycine max L.)–wheat
(Triticum aestivum L.) system under three irrigation regimes namely full irrigation, limited irrigation
and rainfed. The results revealed that the full irrigation along with P-hydrogel led to enhanced grain
yield, biomass yield, and water productivity (WP) of soybean (1.61–10.5%, 2.2–9.5%, and 2.15–
21.8%, respectively) and wheat (11.1–18.3%, 12–54% and 11.1–13.1%, respectively) over control
plots. Likewise, under water stressed plots of rainfed conditions with P-hydrogel exhibited 52.7 and
20.6% higher system yields (in terms of wheat equivalent yield) over control and other combinations
during the respective study years. Whereas the magnitude of increase in system yield under limited
irrigation with P-hydrogel was ~ 15.1% and under full irrigation with P-hydrogel was 8.0–19.4%. Plots
treated with P-hydrogel retained 3.0–5.0% higher soil moisture compared to no-hydrogel plots, while
K-hydrogel treated plots held the lower moisture (4.0–6.0%) than the control. In terms of proftability,
full irrigation along with P-hydrogel plots registered 12.97% higher economic returns over control.
The results suggested that P-hydrogel (2.5 kg ­ha−1) reduces runof water loss in full irrigation applied
plots and retained more water, where loss of water is more thus reduces number of irrigations. Hence
P-hydrogel with irrigation water is a viable option for sustainable production of soybean-wheat
systems in the Indo-Gangetic plains of India and other similar eco-regions of the world
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Date 2023-05-16T03:02:55Z
2023-05-16T03:02:55Z
2022-07-13
 
Type Journal
 
Identifier Not Available
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http://krishi.icar.gov.in/jspui/handle/123456789/77319
 
Language English
 
Relation Not Available;
 
Publisher Not Available