Floral biology of temperate zone fruit trees and small fruits

1996 ◽  
Vol 34 (04) ◽  
pp. 34-2154-34-2154
2007 ◽  
Vol 13 (3) ◽  
Author(s):  
J. Racskó ◽  
J. Nyéki ◽  
M. Soltész ◽  
Z. Szabó

The knowledge of blooming, pollination and fertilisation and its use are indispensable in maximizing of cropping potential of fruits in economical fruit production. In attaining maximum yield a greater attention has to be focused on choosing cultivar combinations, and results of experiments on blooming, pollination and fertilisation must be applied carefully. To have efficient bee pollination requires attention at the time of designing an orchard. It requires further attention at the time of bloom of any of the fruit-hearing species. Markets demand new types of fruit which forces constant changes in the cultivar composition of orchard. The blooming, pollinating and fertilisation characteristics of cultivars chosen have to be known before an orchard is set up. Apart from the general knowledge of trees considered to be planted, there is a great need to know the flowering, pollinating and fertilization characteristics of each cultivar in detail.


In the meadows and pastures of the temperate regions and the tropics, trees flourish when surrounded by communities of grasses and herbs. Such grassland is, with few exceptions, an artificial product, created by man from areas originally forest, and maintained in its present condition by such agencies as grazing, cropping, mowing and manuring. If left to themselves most of the meadows and pastures on the earth’s surface would soon revert to the original forest, the rate depending on a number of circumstances, including the nature of the weapons possessed by the trees in suppressing the grasses and herbs. In the tropics, where pastures are much fewer than in the temperate zone, grassland after enclosure becomes covered by shrubs and trees with remarkable rapidity. Although trees soon oust grasses from the habitat under conditions of free competition, nevertheless cases occur in which grass is able to suppress certain species of trees. One such example has recently been investigated in great detail in Great Britain by the Duke of Bedford and the late Mr. S. U. Pickering. At the Woburn Experiment Station fruit trees such as apples, pears, plums and cherries failed to flourish under grass on a heavy clay soil. Similar results have been obtained in the United States and also on the Gangetic alluvium at Pusa.


2000 ◽  
Vol 6 (1) ◽  
Author(s):  
P. Benedek ◽  
J. Nyéki ◽  
M. Soltész ◽  
Z. Erdős ◽  
I. Skola ◽  
...  

The duration of effective bee pollination period was limited by caging flowering branches for shorter or longer time in blooming fruit trees in a number of experiments during the past decades. In the case of self-sterile fruit species and cultivars (apples, pears, quinces, some plums, some sour cherries) even partial limitation of the effective duration of bee pollination period significantly reduced the fruit set and the yield. In the case of self-fertile apricots the effect of the total and also the influence of partial limitation of bee pollination period was the same as in the case of the mentioned self-sterile fruits. On the other hand, in the case of another self-fertile fruits (some plums, some sour cherries), the effect of partial limitation of bee pollination period was usually small, but complete (or incomplete but strong) limitation of be pollination usually resulted in a strong reduction of yield. This means that not only self-sterile but also self-fertile fruits clearly depend on insect (bee) pollination. This is because pollen dehiscence of anthers and the receptive period of stigmas do not overlap in time within the individual flowers. Stigmas in self-fertile trees, therefore, need pollen carried by bees from another flowers of the same tree (or compatible pollen from another trees). Accordingly, additional bee pollination (moving bee colonies to the orchards in flower) is needed to all kinds of temperate-zone fruit tree species when bee visitation of plantations is not abundant enough for some reasons.


1991 ◽  
Vol 46 (3-4) ◽  
pp. 334-335 ◽  
Author(s):  
Shuichi Iwahori
Keyword(s):  

Sign in / Sign up

Export Citation Format

Share Document