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Irrigation with brackish water modifies the boron requirement of mungbean ( Vigna radiata L.) on typic calciargid.

Authors :
Naeem, Muhammad Asif
Maqsood, Muhammad Aamer
Hussain, Shahid
Khan, Muhammad Khawar
Kanwal, Shamsa
Source :
Archives of Agronomy & Soil Science. Jan2013, Vol. 59 Issue 1, p133-145. 13p. 4 Charts, 6 Graphs.
Publication Year :
2013

Abstract

The boron (B) sufficiency range for plant growth is narrow and its management is problematic under brackish irrigation water. This study was conducted to evaluate the B requirement of mungbean at different sodium adsorption ratios of irrigation waters (SARiw) [control, 8 and 16 (mmolc L−1)1/2]. The boron adsorption characteristics of a loamy soil were first determined in the laboratory by equilibrating 2.5 g soil with 0.01 M CaCl2 solution containing different B levels. Boron rates for a pot study were computed against different soil solution levels by fitting sorption data in a modified Freundlich model [x/m = K f (EBC)1/n ]. The maximum increase in shoot dry matter was 11.9% when B was applied at 1.29 mg kg−1 soil at control SARiw. Visual leaf B toxicity symptoms appeared at higher B rates and became severe at higher SARiw. By contrast to Ca, shoot concentrations of B and Na increased significantly with B application and SARiw. For optimum shoot growth, internal and external B requirements were 25 mg B kg−1 shoot dry matter and 0.39 mg B L−1 soil solution, respectively, at control SARiw. At higher SARiw, a lower concentration of B in plant shoots and soil solution had an inhibitory effect on plant growth. [ABSTRACT FROM PUBLISHER]

Details

Language :
English
ISSN :
03650340
Volume :
59
Issue :
1
Database :
Academic Search Index
Journal :
Archives of Agronomy & Soil Science
Publication Type :
Academic Journal
Accession number :
83404114
Full Text :
https://doi.org/10.1080/03650340.2011.604774