15N2 incorporation by rhizosphere soil influence of rice variety, organic matter and combined nitrogen

Autor:	D. N. Nayak, V. Rajaramamohan Rao, P. B. B. N. Charyulu
Rok vydání:	1981
Předmět:	chemistry.chemical_classification Rhizosphere Soil test Chemistry Bulk soil food and beverages Soil Science chemistry.chemical_element Plant Science complex mixtures Nitrogen Agronomy Soil water Nitrogen fixation Organic matter Cultivar
Zdroj:	Plant and Soil. 59:399-405
ISSN:	1573-5036 0032-079X
DOI:	10.1007/bf02184544
Popis:	Heterotrophic nitrogen fixation by rhizosphere soil samples from 20 rice cultivars grown under uniform field conditions was estimated employing15N-tracer technique. Rhizosphere soil samples from different rice cultivars showed striking differences with regard to their ability to incorporate15N2. Rhizosphere samples from rice straw-amended (3 and 6 tons/ha) soil exhibited more pronounced nitrogen-fixing activity than the samples from unamended soil; while the activity of the rhizosphere samples from soils receiving combined nitrogen (40 and 80 kg N/ha) was relatively low. However, the inhibitory effect of combined nitrogen was not expressed in the presence of rice straw at 6 tons/ha. Results suggest that plant variety, application of combined nitrogen and organic matter influence the rhizosphere nitrogen fixation.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2f73c283097fe7acb8f8e910900760bb https://doi.org/10.1007/bf02184544 Zobrazit plný text záznamu Full text from SpringerLink