Evaluation of some nursery techniques in the production of knip-boom apple trees
2006
Sadowski, A.., Warsaw Agricultural Univ. (Poland). Dept. of Pomology and Basic Natural Sciences in Horticulture | Lewko, J., Warsaw Agricultural Univ. (Poland). Dept. of Pomology and Basic Natural Sciences in Horticulture | Dziuban, R., Warsaw Agricultural Univ. (Poland). Dept. of Pomology and Basic Natural Sciences in Horticulture
In two experimental series (2000-2001 and 2001-2002) 'Sawa' was bench grafted on M.9 EMLA. Rootstocks were separated from mother plants at different dates and grafts treated in a different way: (1) rootstocks taken from stool-beds in November, stored at +1 deg C, grafted in March, callused at 12-15 deg C for 15-20 days and then planted in the nursery; (2) rootstocks separated in December, then treated as (1); (3) rootstocks separated at the end of March or beginning of April, grafted and planted directly in the nursery. In the second year scion shoots were headed back at 70 cm, the renewed leader treated with Arbolin 36 SL and the crown formed by sylleptic shoots (knip-boom) method). The higher output of nursery trees was obtained from the treatments (1) and (2), when rootstocks were separated in autumn or winter and grafts callused. In another experiment, three methods of cleaning stems were compared in production of knip-boom trees developed from budding, using 'Sampion' on M.9 T339 in 2002 and 'Rubin' on P 59 in 2003. The complete cleaning of stems and leaving a single renewed leader at once required less labour than successive cleaning with or without pinching of additional sprouts, left temporarily on the stem. Quality of trees produced by either method was similar.
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