Agricultural systems of Southern European regions are often based on short rotations of winter cereals and are thus subject toagro-ecological problems such as decreasing biodiversity, loss of soil fertility and increasing reliance on mineral fertilisers. Introducing newcrops such as new varieties of faba bean, and new production methods, e.g. different planting times, may increase the sustainability of farmingsystems. To advance the use of these methods, both multi-environment field experiments and improved statistical methods to summarise andinterpret results are needed. This report summarizes experiments conducted over three years and two locations where we compared phenology,morphology and yield of six faba bean, Vicia faba L., genotypes, sown in November and February. We have analyzed the data using canonicalvariate and additive main effect multiplicative interaction (AMMI). We demonstrate how such methods may be useful to obtain relevantinformation about a more successful introduction of faba bean in southern Europe. Our results show that sowing in November is much moresuitable to Southern European regions than a February planting. Indeed, for the November planting, beans flower earlier and pods fill beforethe drought period. Concerning morphology, November sown plants were taller of 0.93 m versus 0.79 m on average; gave a lower insertion offirst fertile branch of 0.44 m versus 0.51 m; gave a higher number of lateral branching per plant, of 1.5 versus 0.8; and gave a higher numberof pods per plant of 10.2 versus 7.6. On the average yield levels were the highest for November sown varieties, of 3.55 versus 2.66 t ha−1.These findings indicate autumn sown faba bean could be introduced in Southern European regions. Using adequate varietal selection, this cropmay improve the agro-environmental sustainability of farming systems. These results also highlight the usefulness of canonical variate andAMMI analysis, as 576 morphological data, e.g. 6 varieties, 2 sowing times, 6 environments and 8 variables, and 72 yield data, e.g. 6 varieties,2 sowing times and 6 environments, can be summarised in two bi-plots, clearly depicting the effect of sowing dates on crop morphology andyield, across locations and years. Such methods deserve a more widespread use when it is necessary to interpret crop response to environmentaland agronomic factors.[...]
Improved multivariate analyses to discriminate the behaviour of faba bean varieties
STAGNARI, FABIO;
2007-01-01
Abstract
Agricultural systems of Southern European regions are often based on short rotations of winter cereals and are thus subject toagro-ecological problems such as decreasing biodiversity, loss of soil fertility and increasing reliance on mineral fertilisers. Introducing newcrops such as new varieties of faba bean, and new production methods, e.g. different planting times, may increase the sustainability of farmingsystems. To advance the use of these methods, both multi-environment field experiments and improved statistical methods to summarise andinterpret results are needed. This report summarizes experiments conducted over three years and two locations where we compared phenology,morphology and yield of six faba bean, Vicia faba L., genotypes, sown in November and February. We have analyzed the data using canonicalvariate and additive main effect multiplicative interaction (AMMI). We demonstrate how such methods may be useful to obtain relevantinformation about a more successful introduction of faba bean in southern Europe. Our results show that sowing in November is much moresuitable to Southern European regions than a February planting. Indeed, for the November planting, beans flower earlier and pods fill beforethe drought period. Concerning morphology, November sown plants were taller of 0.93 m versus 0.79 m on average; gave a lower insertion offirst fertile branch of 0.44 m versus 0.51 m; gave a higher number of lateral branching per plant, of 1.5 versus 0.8; and gave a higher numberof pods per plant of 10.2 versus 7.6. On the average yield levels were the highest for November sown varieties, of 3.55 versus 2.66 t ha−1.These findings indicate autumn sown faba bean could be introduced in Southern European regions. Using adequate varietal selection, this cropmay improve the agro-environmental sustainability of farming systems. These results also highlight the usefulness of canonical variate andAMMI analysis, as 576 morphological data, e.g. 6 varieties, 2 sowing times, 6 environments and 8 variables, and 72 yield data, e.g. 6 varieties,2 sowing times and 6 environments, can be summarised in two bi-plots, clearly depicting the effect of sowing dates on crop morphology andyield, across locations and years. Such methods deserve a more widespread use when it is necessary to interpret crop response to environmentaland agronomic factors.[...]I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
