L. Rufato

Diferentes manejos da cobertura vegetal de aveia pretaem pomar no sul do Brasil

The experiment was managed in the Didactic Orchard of the Agricultural Center of Palma, which belongs to the Federal University of Pelotas (UFPel). The treatments consisted of 5 different managements of black oat crop cover: incorporation of black oat to soil; chemical management with herbicide; lodging; mowing at 5 cm and control (uncovered soil). The sowing of the oat was accomplished by April of 2002 and the installation of the experiment, by the end of August of the same year. The analyzed variables were percentage of soil moisture at a depth of 15 cm, temperature of the soil at a depth of 5 cm, percentage of organic matter of the soil, soil resistance to the penetration and identification and degree of infestation by weeds. The experiment was managed in randomized blocks, with 3 blocks, 5 treatments and one repetition. The data were submitted to analysis of the variance through F test and the averages compared by Duncan Test. Maintenance of crop covering in orchard propitiated smaller temperature and larger soil moisture; the soil turn-over increased the diversity of weeds and the incorporation of black oat, after 60 days, had the same behavior as the uncovered soil.

Plantas de cobertura de solo em pomar de pessegueiro (Prunus persica L. Batsch) conduzido no sistema de produção integrada

This research was carried out in the South of Brazil with the objective to examine the effects of five cover crops and their combinations on peach orchard leaded in Integrated Crop Management. The experimental orchard was installed in 1999 at 1.5 x 5.0m planting density, with two training systems: Central Leader (CL) and Ypsilon Shape (Y). The increment on trunk diameter, the increment on foliage size, the frequency productive buds, fruit yield, fresh and dry matter were evaluated. The combination of different cover crops was beneficial considering the productivity with distinction to the Avena strigosa+Pisum sativum combination. The trunk diameter of peach tree was not influenced by cover crops. Nevertheless, the foliage size, frequency productive of buds, and productivity were significantly affected by the cover crops.