Using 15N to measure N fertiliser efficiency in fertigated and drip irrigated pepper and melon crops
Fecha de publicación:
1 de enero de 2007
Resumen:
15N was used in field experiments to measure N fertiliser efficiency of sweet pepper and melon crops receiving N fertiliser through fertigation and drip irrigation. Two combined irrigations and N fertilisation managements were evaluated, being conventional local management and improved management. Nutrient solution containing 15N-labelled Ca(NO3)2 was applied at two growth stages (rapid vegetative growth and late fruit production), using inverted polyethylene bottles fitted with intravenous drippers. 15N uptake was determined in above-ground biomass from plants directly receiving 15N-labelled nutrient solution and from ...