Study on improvement of production technology by grafted walnut seedlings

Abstract

The study was conducted during 2011-2013, in the climatic conditions in the Baltati region, Iasi County. The settings up of the field was done using direct seeding in the field in protected conditions (solar tunnel) using walnuts from current year production and have not undergone any treatment to stimulate germination before sowing. Seeding distance was 75 cm between rows and 10 cm on the row and sowing depth was 5 cm. For grafting was used chip budding method, grafting into two periods: August 2012 (the sleeping bud) and April 2013 (the growing bud). For grafting in August, graft branches were used, which were shaped in two different moments: removing leaves and stems, keeping a portion of 2 cm, make two months before harvesting the graft branches (V1) and trimming the leaves graft branches at harvest (V2). For grafting in April were used branches harvested in late autumn and stored over winter in deposits setpoints 2-4 ◦C (V3). The walnut germintion percentage was 61.4%, with grafting procentage of 67.8% (V1), 30.2% (V2) and 48.8% (V3) and the percentage of grafted trees STAS was 26% at Anica variety and 59% at Prezident variety.