Mineral nutrient analysis of three halophytic grasses under sodic and saline stress conditions

CHARU LATA; ASHWANI KUMAR; ANITA MANN; SHOBHA SONI; B L MEENA; SULEKHA RANI

doi:10.56093/ijas.v92i9.91277

Authors

CHARU LATA ICAR-Central Soil Salinity Research Institute, Karnal
ASHWANI KUMAR ICAR-Central Soil Salinity Research Institute, Karnal, Haryana
ANITA MANN ICAR-Central Soil Salinity Research Institute, Karnal, Haryana
SHOBHA SONI ICAR-Central Soil Salinity Research Institute, Karnal, Haryana
B L MEENA ICAR-Central Soil Salinity Research Institute, Karnal, Haryana
SULEKHA RANI Kurukshetra University, Kurukshetra, Haryana

https://doi.org/10.56093/ijas.v92i9.91277

Keywords:

Leptachloa, Nutrients, Sporobolus, Urochondra

Abstract

Present study was carried out to assess the effects of soil salinity/sodicity on mineral nutrient status of Urochondra setulosa, Leptochloa fusca and Sporobolus marginatus at ICAR- Central Soil Salinity Research Institute, Karnal, Haryana during 2016–19. Treatments of salinity/sodicity (pH ~ 9.5, pH ~ 10, ECe ~ 30 dS/m, ECe ~ 40 dS/m and ECe ~ 50 dS/m) were created in microplots (2.5 m × 1.5 m × 0.5 m) using saline/sodic water. Na+ and Cl– content (% DW) significantly increased with increasing sodicity/salinity stress condition in all three grass halophytes, whereas K+ content decreased. These grass halophytic species showed relatively less reduction in Ca, Mg and Fe contents up to sodic stress of pH ~ 9.5 and salinity level of ECe ~ 40 dS/m. Zn, Cu and Mn content decreased with increasing stress conditions but higher decrease was observed under sodic stress. The Na+/K+ and Na+/Ca2+ ratio was considered as indicators for measuring salt tolerance in plants. Na+/K+ ratio increased with increasing stress condition in all the three grasses but Leptachloa maintained their Na+/K+ near pH 1.0 under sodic stress condition and also maintained their Na+/Ca2+ below 1.0 up to pH ~ 9.5 and ECe ~ 40 dS/m. Higher sodic stress of pH~10.0 caused significant increase in Na+/Ca2+ in Urochondra and Sporobolus, whereas under highest salinity level, Leptachloa showed highest value for Na+/Ca2+. Changes in the accumulation patterns of nutrient in response to salinity is an important aspect and study showed highest positive correlation between Ca - Mg & Zn and negative between Na - Ca and K.

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