Recommended sowing densities for dry peas in Chile are lower than those advised abroad, suggesting that yields may be improved through this factor. Conventional foliage cvs. Paloma (shorter internodes, larger leaflets, higher soil surface covering ability) and Florette (Ionger internodes, smaller leaflets, less covering ability) were planted in 17 and 34 cm row spacings, at 25, 50, 75,100 and 125 seeds/m2. The trial wa.s disposed in randomized blocks, with factorial arrangement of spacings and populations, and four replicates, in an Andisol near Temuco, Southern Chile. The highest yields were obtained with about 90 (Paloma) and 90-100 (Florette) plants/m2. In general, increases in yield were small above 70 plants/m2. Paloma 's yield (qu intals/ha) response due to plant population for 17 cm spacing, was adjusted to equations V = -1.9913 + 1.2348P -0.0071P2 , in 1982, and V = -17.8948 + 0.4517P -0.0017P2 , in 1984; at 34 cm, equations were Y = 4.3260 + 0.8515P -0.0055P2 , in 1982, and Y = 16.1430 + 0.6964P -0.0040P2, in 1984. Florette's response at 17 cm spacing was fitted to V = 9.7273 + 0.3932P -0.0008P2 , in 1982, and V = 2.9676 + 0.4766P -0.0022P2, in 1984; at 34 cm, to V = 6.9803 + 0.5244P -0.0031 P2, in 1982, and Y = 15.8181 + 0.2253P -0.0008P2, in 1984. Mean yields of both cultivars at 17 cm row spacing were higher in 1982; but 34 cm was better for both in 1984. The number of pods/plant decreased as plant population increased, being the yield component most affected. The number of flat pods of Paloma increased as plant population increased. In 1984, the number of seeds/pod of both cultivars and the seed weight of Florette were inversely correlated to plant population. |
ChileanJAR
