Effect of Sowing Depth on Nodulation, Nitrogen Fixation, Root and Hypocotyl Growth, and Yield in Groundnut (Arachis hypogaea)

Hypocotyl length in groundnut is a function of sowing depth. In field experiments deep sowing increased the mass of hypocotyl but decreased that of roots, pods and haulm. Few nodules were formed on the hypocotyls of plants from shallow sown seeds (4–5 cm deep). More hypocotyl nodules occurred on Vir...

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Bibliographic Details
Published in:Experimental agriculture 1987-07, Vol.23 (3), p.283-291
Main Authors: Nambiar, P. T. C., Rao, B. Srinivasa
Format: Article
Language:English
Subjects:
Adaptation to environment and cultivation conditions
Agronomy. Soil science and plant productions
Arachis hypogaea
Biological and medical sciences
crop yield
Fundamental and applied biological sciences. Psychology
Genetics and breeding of economic plants
growth
hypocotyls
nitrogen fixation
nitrogenase
nodulation
root nodules
roots
sowing depth
Varietal selection. Specialized plant breeding, plant breeding aims
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Summary:Hypocotyl length in groundnut is a function of sowing depth. In field experiments deep sowing increased the mass of hypocotyl but decreased that of roots, pods and haulm. Few nodules were formed on the hypocotyls of plants from shallow sown seeds (4–5 cm deep). More hypocotyl nodules occurred on Virginia types when deep sown but the number and activity of nodules on the roots decreased. Nodules on the hypocotyl appeared later and fixed less nitrogen than root nodules. Although hypocotyl nodules fixed nitrogen during the later stages of plant growth, this activity could not compensate for the loss in nitrogenase activity due to deeper sowing. Deeper sowing also resulted in decreased pod yields.
ISSN:0014-4797
1469-4441
DOI:10.1017/S0014479700017166