Hedgerow orientation affects canopy exposure, flowering, and fruiting of 'Anjou' pear trees

Khemira, H.; Lombard, P.B.; Sugar, D.; Azarenko, A.N.

Hedgerow orientation affects canopy exposure, flowering, and fruiting of 'Anjou' pear trees

1993

Khemira, H. | Lombard, P.B. | Sugar, D. | Azarenko, A.N.

Mature hedgerows of'Anjou' pear (Pyrus communis L.) trees, planted north (N)-south (S) or east E)-west (W), were used to study the effect of hedgerow orientation on fruiting and canopy exposure. In 1990, flower bud density tended to be lower on the E-W rows, especially on their N sides. Fruit set (FS) was highest on the S side of E-W rows and lowest on the N side, while the E and W sides of the N-S rows were intermediate. Crop density (CD) had a similar pattern as FS, with more fruit on the S than on the N side of the E-W rows. CD was more evenly distributed between the sides on the N-S hedgerows. Differences in FS and CD between sides were related to different levels of sunlight interception. Light exposure was lowest on the N sides of the E-W rows and highest on the S sides throughout the growing season and especially toward the equinoxes. Increased exposure to the sun on the S and W sides late in the season led to more fruit with solar injury. Fruit from E-W rows were larger and less firm. Accumulated yields over 11 years showed a 21.4% increase in the N-S rows over those of the E-W rows.

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