Books  Sustainable Development  Agriculture & Food 

Symbiotic N2 Fixation of Crop Legumes: Achievement and Perspectives

Series: Hohenheim Tropical Agriculture Series Volume: 2

By: AP Hansen

248 pages, 9 col plates

Joseph Margraf Verlag

Paperback | Dec 1994 | #45913 | ISBN: 3823612352
Availability: Usually dispatched within 1-2 weeks Details
NHBS Price: £42.00 $57/€48 approx

About this book

The conversion of nitrogen gas to nitrogen compounds (N2 fixation) is essential for living organisms, and can be facilitated by industrial and natural processes. A major proportion of the naturally "fixed" nitrogen is biologically converted by micro-organisms living in symbiosis with plants. Legumes represent common hosts for a range of such diazotrophic bacteria, and constitute, next to cereals, the most important agricultural crops. Starting with first principles, this book provides wide-ranging, up-to-date information on symbiotic N2 fixation of legumes with emphasis being placed upon common bean (phaseolus vulgaris) and soybean (glycine max). Divided into five chapters, the text focuses – after an initial introduction – on processes leading to nodulation and maturation of nodules, biochemical and physiological aspects of N2 fixation, as well as the influence of the environment on symbiotic activity. Following chapters deal with techniques used for laboratory and field measurements of N2 fixation, specific physiological aspects of supernodulating legumes, and future perspectives for increasing symbiotic conversion of dinitrogen in agricultural systems. The text gives a comprehensive overview of current theory and practice of the subject. It should be useful for graduate students, and represents a reference for scientists engaged in studies on symbiotic N2 fixation.


- Introduction: atmospheric N2
- non-biological forms of N2 fixation
- biological forms of N2 fixation
- N2 fixation in natural ecosystems
- N2 fixation in forestry and recultivation
- N2 fixation in agriculture

Part 1 N2 fixation of leguminosae
- the microsymbiont
- the macrosymbiont
- nodulation
- different forms of nodules
- metabolism of N2 fixation
- influence of the environment

Part 2 Assessment techniques for N2 fixation
- direct methods
- indirect methods

Part 3 Supernodulating legumes
- symbiotic performance and the effect of nitrate
- carbon and nitrogen metabolism

Part 4 Means to improve N2 fixation
- current approaches
- potential for future benefits

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