Resiembra natural en Lotus tenuis implantado con diferentes sistemas de siembra

the incorporation of lotus tenuis would increase the productivity of grasslands in a sustainable way based on its persistence, for which natural reseeding of l. tenuis is important. the objective of this study was to evaluate the potential of natural reseeding in a pasture of l. tenuis cv. aguapé in three sowing systems. the trial was implanted on april 19, 2006 in la chacra experimental de chascomus, province of buenos aires (35° 34' s; 58° 30' w) in a 14.6 ha lot. treatments were three sowing systems: by hand (v), intercropping (i) and direct (d). the experimental design was a randomized complete block and the experimental unit was a 1.92 x150 m plot. the variables were: number of seedlings, production and quality of seed and potential reseeding by estimating emergence of new seedlings. a variance analysis was carried out and means were compared with the tukey test. direct seeding was higher (p<0.01) than the other two systems in plant growth, seed production and emergence of new seedlings, but there was no difference (p>0.05) in seed quality. air weight per plant or per unit area influenced (p<0.05) linearly and positively on the physiologically viable seed production. therefore, the best response in natural reseeding with direct sowing was associated with having favored a greater air weight. regardless of the sowing system l. tenuis cv. aguapé showed a high potential for natural reseeding. the conclusion was that the expression of the natural reseeding potential depends on the sowing system and that direct sowing, when favoring a higher seed yield, presents a higher potential for natural reseeding than the intercropping and hand sowing.