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The influence of rate and form of mineral nitrogen on seedling growth symbiotic nitrogen fixation and mineral nitrogen assimilation in desmodium intortum cultivar greenleaf

Kitamura, Y.; Nishimura, S.

Grassland Science 26(3): 290-296

1980

ISSN/ISBN: 1744-6961
Accession: 006699943
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The effects of NH4-N, NO3-N and NH4NO3-N on seedling growth, nodule formation, symbiotic [Rhizobium] N2 fixation and mineral-N assimilation of D. intortum cv. Greenleaf were investigated under controlled conditions. The rate of mineral-N application influenced the DM [dry matter] yield but the form of mineral-N did not. As N rates increased, total nodule number and weight were positively affected with NH4-N, but not with NO3-N. Weight per nodule increased with higher rates of NO3-N, but not with NH4-N application. Plant N from symbiotic N2-fixation increased linearly with NH4-N, and decreased with NO3-N application. N originating from mineral-N increased linearly with increasing rates of N application in the following order: NO3-N > NH4NO3-N > NH4-N. NH4-N is a better source of N for starter N.

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Related References

Kitamura, Y.; Nishimura, S. 1980: The influence of rate and form of mineral nitrogen on seedling growth, symbiotic nitrogen fixation and mineral nitrogen assimilation in Desmodium intortum cv. Greenleaf Journal of Japanese Society of Grassland Science 26(3): 290-296
Kitamura, Y.; Nishimura, S. 1978: Studies on mixed cultivation of tropical legume and grass part 7 the effect of temperature on nitrogen fixation and nitrogen absorption during the seedling stage of greenleaf desmodium intortum Grassland Science 24(2): 128-132
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