ABSTRACT


Patricio Azócar C.1 y Patricio Soto O.2
 
A fiel trial was conducted at the Carillanca Experiment Station, near Temuco, Chile, during the 1965- 1969 growing seasons. The purpose of this investigation was to study under rainfed conditions the effect of wheat in the year of seeding and the following year, upon red clover (Trifolium pratense L.) and short rotation ryegrass (Lolium perenne L. x Lolium multiflorum Lam) seedlings established under wheat, in fall and spring, and reciprocally, the effect of the two forage species in wheat grain production. Wheat variety Cappelle Desprez was seeded at the rate of 150 Kg/ha in rows spaced at 0,20 m and 0,40, in mixture with red clover and short rotation ryegrass, and alone.
Red clover variety Quiñequeli and short rotation ryegrass variety Manawa were seeded in the fall and spring at the rate of 6 Kg/ha in rows spaced at 0,20 m, together with wheat, and alone. It is concluded that red clover and short rotation ryegrass seeded alone in spring give the highest dry matter yield per ha. When these forage species are spring sown into a wheat companion crop sown in the previous fall in rows spaced at 0,20 m, the forage production decreases slightly in the second harvest season, in comparison with that produced by forage species seeded alone. The other systems of seeding yield less forage. When short rotation ryegrass is seeded, mainly in spring, with a wheat companion crop, forage production decreases in the year of seeding and the following one. However, when it is seeded alone gives a high percentage of ihe total dry matter yield. The red clover and short rotation ryegrass do not affect the yield of wheat.
Keywords:
1Ing. Agr. M. S., Proyecto Praderas Húmedas y Produccion Animal. Estación Experimental Carillanca. Instituto de Investigaciones Agropecuarias. Casilla 58-D, Temuco, Chile.
2Ing. Agr, Proyecto Praderas Húmedas y Producción Animal, Estación Experimental Carillanca, Instituto de Investigaciones Agropecuarias.