Effects of foliar-applied nitrogen during winter on growth, nitrogen content and production of passionfruit

作者: C.M. Menzel , D.R. Simpson , G.H. Price

DOI: 10.1016/0304-4238(86)90108-1

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摘要: Abstract The effects of foliar-applied nitrogen (11.5 g N l −1 ) during winter on growth, content and production passionfruit ( Passiflora edulis f. × P. flavicarpa cultivar E-23 grafted onto was investigated in subtropical Queensland, Australia. Vegetative growth flowering were severely restricted the untreated vines, despite maintenance leaf levels within range presently believed to be optimum for Queensland conditions after applied soil autumn. Foliar urea applications (monthly or twice monthly) increased but reduced subsequent fruitlet number. Reductions vegetative appear due a direct effect cool and/or air temperatures, unrelated uptake, translocation level.

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