H. Stutzel et al., YIELD FORMATION AND YIELD COMPONENTS OF A CONVENTIONAL AND AN EPIGONAL GENOTYPE OF WHITE LUPIN (LUPINUS-ALBUS), Journal of agronomy and crop science, 170(3), 1993, pp. 177-186
Differences in yield formation and yield structure of two contrasting
Lupinus albus growth types, the conventional, freely branching cultiva
r Kalina and the epigonal, little branching cultivar Ep I were analyze
d. Both cultivars were grown in field experiments at Hohenheim in 1987
and 1988 with a combined variation of population density (30-120 plan
ts/m2) and plant distribution. In addition, assimilate distribution wi
thin the plant was studied using a C-14-labelling experiment. - The co
ntributions of branches to light interception of the crops during the
generative phase were > 90 % in Kalina as compared to about 30 % in Ep
I. Relative C-14 uptake of branches was in a similar range, but great
proportions of the C-14 taken up by branches was translocated to main
stems. No genotype x plant density interactions with respect to grain
yield were recorded, indicating that yield formation at main stems an
d branches was affected by cropping conditions similarly in both genot
ypes. This applies to the conditions of the experiments, where stress
effects were absent. Under these conditions, the conventional genotype
showed agronomic, but no physiological disadvantages.