Retranslocation, Plant, and Soil Recovery of Nitrogen‐15 Applied to Bareroot Black Walnut Seedlings

Autor:	Douglass F. Jacobs, M. Anisul Islam, K. Francis Salifu
Rok vydání:	2009
Předmět:	biology Soil Science chemistry.chemical_element Juglandaceae engineering.material biology.organism_classification Nitrogen Horticulture chemistry Soil water Botany Shoot engineering Hardwood Fertilizer Soil fertility Agronomy and Crop Science Juglans
Zdroj:	Communications in Soil Science and Plant Analysis. 40:1408-1417
ISSN:	1532-2416 0010-3624
DOI:	10.1080/00103620902818062
Popis:	Although retranslocation or nitrogen (N) derived from plants (NDFP) may account for more than 50% of the annual N demand in new growth of conifer seedlings, the proportional contribution of NDFP vs. current uptake or N derived from fertilizer (NDFF) in new growth of hardwood seedlings is relatively unknown. The current uptake was labeled with ammonium sulfate [(15NH4)2SO4] at the rate of 1.56 g N plant−1 and reared for 90 days in sand culture under greenhouse conditions, and NDFP vs. NDFF was quantified in new growth of half‐sib bareroot black walnut (Juglans nigra L.) seedlings. Nitrogen derived from plants accounted for 68 to 83% of the total N demand in new shoot growth of black walnut seedlings vs. NDFF (17 to 32%). Recovered applied fertilizer was 43% in soil and 9% in plants. The greater proportion of NDFP in new growth demonstrates the importance of retranslocation in meeting early N demand of transplanted black walnut seedlings.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1ee0009757fd5e243234a3c859065fd5 https://doi.org/10.1080/00103620902818062 Zobrazit plný text záznamu