Influence de la densité de semis sur la productivité du pois sec cultivé sous un climat frais

Abstract

Pea production is important in Canada, but this pulse is rarely sown as a pure stand in Quebec. A study was conducted from 1997 to 1999 to evaluate the effect of four seeding rates (50, 75, 100 and 150 grains m -2 ) on the productivity of two semi-leafless pea (Pisum sativum L.) cultivars (Delta and Carneval) and two normal leaf cultivars (Bohatyr and Grande) under a cool climate. Generally, when the seeding rate increased from 50 to 150 grains m -2 , maturity was reached earlier, lodging increased but 1000-grains weight and protein content decreased. Maximum grain yields were obtained with 138 grains m -2 in 1997 and with 139 grains m -2 in 1998. In 1999, seeding rate had no significant effect on grain yields of the two normal leaf cultivars Bohatyr and Grande. However, linear effect of seeding rate was significant for the semi-leafless cultivars Carneval and Delta. Those results indicate that the semi-leafless cultivars benefit more from an increase in seeding rate compared with normal leaf cultivars. Moreover, semi-leafless cultivars are less susceptible to lodging. A seeding rate of 100 grains m -2 would allow higher grain yields without increasing lodging that appears with high seeding rates.

Planting date and seeding rate of field pea in the semi‐arid high plains of Nebraska

“…Any benefit of earlier planting to optimize harvest index did not translate to a benefit in grain yield when comparing yield response curves among planting date treatments (Figures 5 and 6). Although plant height was only measured in 2018, it did not vary among seeding rates, which agrees with previous studies (Armstrong & Pate, 1994;Knott and Belcher, 1998;Nleya & Rickertsen, 2011;Pageau, Lajeunesse, & Lafond, 2007). Most pea yield components were negatively correlated with final plant population, as shown in this experiment.…”

Agronomical factors influencing the legumin/vicilin ratio in pea (Pisum sativum L.) seeds

“…ANOVA for protein content (Table 3(c)) indicates that seeding density has no effect on protein content. Pageau et al 49 did the same experiment on Canadian peas for three consecutive years. For two years, they also concluded that seeding density has no effect.…”

Di-ammonium phosphate (DAP) and plant density improve grain yield, nodulation capacity, and profitability of peas (Pisum sativum L.) on ferralsols in eastern D.R. Congo

“…On the other hand, the efficiency and profitability of fertilizers depend on other farming practices, such as optimal plant density, productive varieties, and adaptation to local conditions (Blanco-Canqui and Lal 2007). Differences in plant growth, development, and yield were recorded with plant densities and pea cultivars (Park et al 1999;Ayaz et al 2004;Pageau et al 2006).…”

“…Densely planted peas were etiolated as a consequence of light searching. In such case, high plant densities can only be adopted for biomass production (to produce fodder or leaves, where the latter are consumed) (Pageau et al 2006;Ayaz et al 2004). For grain production, Matthews (2003) and DAFF (2016) suggested that 90,000 plants per ha (9 plants per m 2 ) was optimal, while for biomass production, Johnston et al (2002a, b) advised increasing density up 50 to 75 plants per m 2 .…”