Nitrogen Nutrition of Cowpea (Vigna unguiculata). I. Effects of Applied Nitrogen and Symbiotic Nitrogen Fixation on Growth and Seed Yield
- 1 January 1977
- journal article
- research article
- Published by Cambridge University Press (CUP) in Experimental Agriculture
- Vol. 13 (2) , 129-142
- https://doi.org/10.1017/s0014479700007729
Abstract
SUMMARY: Effectively nodulated cowpea plants, grown in pots without applied nitrogen, were vegetatively equal to non-nodulated plants supplied with 60 ppm N throughout growth (88 days) and produced significantly greater seed yields. Supplying non-nodulated plants with 120 or 240 ppm N improved seed yields (but not significantly) compared with plants completely dependent on symbiotic fixation. Nodulation promoted branching, and improved pod set and/or retention compared with plants relying on applied N.This publication has 9 references indexed in Scilit:
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