A DEMOGRAPHIC ANALYSIS OF GROWTH DIFFERENCES BETWEEN NUI AND RUANUI RYEGRASS AT HIGH AND LOW NITROGEN INPUTS

Autor:	B.J. Mortimer, W.F. Hunt
Rok vydání:	1982
Předmět:	Low nitrogen Agronomy food and beverages General Medicine Biology Demographic analysis
Zdroj:	Proceedings of the New Zealand Grassland Association. :125-132
ISSN:	1179-4577 0369-3902
DOI:	10.33584/jnzg.1982.43.1612
Popis:	Because of phenotypic differences, monocultures of Nui have tillers that are on average 43% larger but 20% less dense than monocultures of Ruanui. Nui tillers had larger leaves for most of the year and also more leaves per tiller during spring when Nui leaf appearance rates tended to be higher. Nui growth rates were higher in spring when temperature and nutritional limitations were removed. Nui yielded 54% more than Ruanui annually under high nitrogen nutrition. High nitrogen nutrition increased tiller density and death, tiller and leaf appearance rates, and leaf size and growth rate during the warmer months. Intermittent applications of nitrogen increased temporarily tiller and leaf appearance rates in apparent compensation for preceding lower rates. High nutrition tillers were more severely defoliated and had fewer leaves at the beginning of regrowths.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::445be0172c70c693e5e5c185196e92cb https://doi.org/10.33584/jnzg.1982.43.1612 Zobrazit plný text záznamu