M"y, L974 - MSpace at the University of Manitoba

1" 5 CIILTURAI, PRACTICES
1.51 Inoculation
Lupins, like other legumes, store large amounts of proÈein in their
vegetative parts and seeds" ProËein synthesis is dependent upon organíc
nítrogen, which is obtained from the symbíosis bett¡een the root system
and the bacteritur Rhizobiwn Lupini. Thís particular bacËerium is classi-
fied into the lupín inoculation group and will not function with other
legurne species (Erdman, 1953).
Norris (1956) and Graharn (1964) found that the 1upín nodule bacterium
differs in many respects from the Rhizobit¡n classification" They are re-
1atívely slow growing and can survive 1ow soíl ferËility and pH, therefore
Graham suggests that this inoculaËion group be transferred Ëo Ëhe genus
Phytomyæa"
Ne1 (1960) found that ínoculation is not always necessary" Yield
decreased when uninoculated seed was groÍrn on land that had not carried
lupins for seven years, however no yield decreases resulted when uninocu-
lated seed rrras groltn on land Ëhat was cropped with lupins Ëwo years pre-
víous. McKee and Ritchey (L947) suggested that inoculation should be
caxried out every year, even on land prevíously cropped with lupins"
Schinidt (L967) found ËhaË some indigenous strains of lupin inoculum
are parasític" Ilowever, if an active straín was placed on the seed prior
to plantingo it prevenÈed infection by the inactive parasitic strain"
Differences in strain effíciency exíst. Kretovich et a1. (L972) found
a correlation between intensity of respiration, cyÈochrom. P450 "td
effeetiveness of t1ne Rhizobiun strain" Ineffective strains had onLy 257"
of the respiration of effective strains and conËained no cytochrom. P450"
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