[Problems of hazelnut planting stock growing in specialized mother plantations using trickle irrigation]
2008
Makhno, V.G. | Gorobets, S.A., All-Russia Research and Development Inst. of Floriculture and Subtropical Crops, Sochi (Russian Fedeartion)
The problem was to improve hazelnut planting stock production in a perennial growing cycle. The experiments were held in 2004 at a test plot equipped by an aggregate of trickle irrigation. The follow variants were studied: 1. without irrigation (control); 2. with medium irrigation (full field water capacity (FFWC) was 60%); 3. with high irrigation (FFWC was 80%). Three perspective hazelnut varieties President, Kavkaz, Sochi-1 were a research object. The conditions of irrigation technology were determined for the lower limits of soil insiccation (FFWC 60%, FFWC 80%): dropper number for a stool was 1, moistening depth was 0.4 m, moistening boundary was 0.4 square m, dropper demand on average was 0.75-0.8 liter per hour. Irrigation rates and number of hazelnut stools were 11 by 9.6 l in the 3 variant, they were 6 by 13 l in the 2 variant in critical periods (May, June, July, August). Planting stock output was 12-22 units in the test variants and it was 10-12 ones in the control variant. A positive effect of trickle irrigation was noted for planting stock quality. Sapling height was 0.65-0.85 m (a), stem diameter was 0.004-0.005 m (b), root length was 0.01-0.012 m (c) and standard sapling output was 70-75% (d) in the control variant. The same characteristics were 1.03-1.26 m (a); 0.007-0.012 m (b); 0.12-0.25m (c); 90-95% (d) respectively in the variants with irrigation. Profitability of planting stock production was 92.9-134% depending on the variety and the test variant and it did not exceed 66.7-88.7% in the control variant
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