Volume 45 Number 4 Article 12
Year 1991 Month 10
Title: Foliar Nutrient Content of 'Starkspur Supreme Delicious' on Nine Clonal Apple Rootstocks
Authors: C.R. Rom, R.C. Rom, W.R. Autio, D.C. Elfving, and R.A. Cline
Abstract:
The influence of nine apple rootstocks on
foliar mineral content was evaluated in Arkansas
(AR), Massachusetts (MA), and Ontario (ONT),
as part of the NC-140 1980-81 cooperative proj
ect.
Nutrient content of vegetative leaves was
analyzed for differences among rootstocks, lo
cations, and years.
Rootstock affected foliar
mineral content in some years but differences
were small and no rootstock resulted in nutrient
levels in a deficiency range.
However, in low
pH soil of the AR site, the rootstocks MAC.9
and M.27 EMLA had high leaf Mn levels and
expressed Mn toxicity.
Rootstock did not affect
foliar N level when data were averaged across
sites but there were significant rootstock differ
ences in ONT and a significant rootstock by
year interaction in MA. Site was the greatest
source of variation for N and Mg content while
sampling year caused the greatest variation for
K and Ca.
Across all sites, there were no rootstock
by year interactions.
In AR, sampling year
accounted for the greatest percentage of vari
ance in N, P, K, Ca, Mg, and B content while
rootstock was the greatest source of variation
for Mn content.
Full text download: APS subscribers
ISHS members & pay-per-view
(PDF 1392813 bytes)
Translate:
APS membership administration
ISHS membership administration
