The effect of dormant pruning on the carbohydrate metabolism of Vitis vinifera
AuthorA. J. Winkler
Author AffiliationsA. J. Winkler was Associate Professor of Viticulture and Associate Viticulturist in the Experiment Station.
Hilgardia 4(6):153-173. DOI:10.3733/hilg.v04n06p153. September 1929.
Abstract does not appear. First page follows.
In previous papers(2), (3), (4) experiments were described, the results of which showed: (1) that dormant2 pruning depresses the capacity of the vines for total growth; (2) that dormant pruning depresses the capacity of the vines for fruiting; (3) that dormant pruning reduces the quality of the fruit of some varieties; and (4) that bearing depresses the capacity of the vines for growth.
The purpose of this paper is to describe the effect of dormant pruning on the carbohydrate metabolism of the vine and to discuss the influence of this effect on growth and fruiting.
Types of Pruning Used
The plan of the plantings and the various types of pruning employed were those described in detail in the earlier papers.(2), (3) The types of pruning used on the vines from which samples for analysis were taken were:
Non-pruned, part crop: no pruning. All clusters in excess of what was thought necessary for a good crop of fruit were removed before blooming.
 Shaffer PA, Hartman AF. The iodometric determination and its use in sugar analysis. Jour. Bio. Chem. 1920. 45:349-390.
 Winkler AJ. Some responses of Vitis vinifera to pruning. Hilgardia. 1926. 1:526-543. DOI: 10.3733/hilg.v01n20p525 [CrossRef]
 Winkler AJ. The influence of pruning on the germinability of pollen and the set of berries in Vitis vinifera. Hilgardia. 1926. 2:107-124. DOI: 10.3733/hilg.v02n05p107 [CrossRef]
 Winkler AJ. Improving the fruiting of the Muscat of Alexandria by less severe pruning. Proc. Amer. Soc. Hort. Sci. 1927. 24:157-163.