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Proceedings
AGROTECHNICAL FACTORS AND SEED YIELD IN COMMON VETCH (VICIA SATIVA L.) IN SOUTHERN ITALY
2 - INFLUENCE OF PLANT DENSITY AND GENOTYPE
G. Pacucci and C. Troccoli
Istituto di Agronomia generale e Coltivazioni erbacee dell'Università di Bari
Via Amendola 165/A, 70126 Bari (Italy)
Plant density is one of the most important agrotechnical factors for seed production. The obtention of new vetch varieties, 'Itria', 'Murgia' and 'Sauro' characterized by seeds of different size, dictates the need to identify the optimal plant density to use for seed yield purposes. In addition to these three varieties, a selected genotype 'Line 681' was also tested. Plant densities of 40, 80, 120 and 160 seeds/m2 for the four genotypes were tested in two locations in Southern Italy. At harvest, seed yield and 1000-seed weight were measured. Higher seed yields (46.0 q ha-1) were obtained in Policoro (MT) (deep silty-clay soil) than in Valenzano (BA) (shallow loam clay terra rossa soil) (21.7 q ha-1); on average, the best plant density was between 80 and 120 seeds/m2 , and this trend was more evident in Policoro and varied with the genotype. The 1000-seed weight was 71.9 g in Valenzano and 67.7 g in Policoro. Increasing the plant density, the 1000-seed weight decreased linearly and this pattern was more evident in Valenzano. The genotypes showed interactions with plant densities and locations for both characters.
Keywords: plant density; vetch genotypes; seed yield; 1000-seed weight.