ISHS Acta Horticulturae 367: VI International Symposium on Pear Growing
EFFECT OF CROP DENSITY ON VEGETATIVE GROWTH, FLOWERING, FRUIT SIZE, AND YIELD IN 'NIJISSEIKI' PEAR TREES |
| Authors: | S. Gu, Porter B. Lombard |
| Abstract:
Fruitlets of 'Nijisseiki' pear (Pyrus pyrifolia) on P. betulaefolia rootstock were thinned to crop density (CD) of 3–16 fruit-cm-2 trunk cross-sectional area (TCSA) in 1986 and 1–7 fruit-cm-2 TCSA in 1987. Increases in CD reduced trunk growth, area, and weight of non-fruiting spur leaves, and mean, total length, and number of terminal shoots. Decreasing CD increased fruit weight but decreased yield. Percent of fruit with larger diameter increased between a CD of 3 and 7 fruit.cm-2 but remained constant from 1 to 3 fruit-cm-2 in 1987. Calculated leaf number per fruit at CD 3 was 44. There was no effect of CD levels on return bloom. | |
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