| Popis: |
SummaryThe roles of current CO2 assimilation and stored carbohydrates on fruit retention in lychee (Litchi chinensis Sonn.) were investigated. In 12 year old ‘Tai So’ trees growing at Burgershall in subtropical South Africa (lat. 25°S), terminal branches were cinctured (girdled) 0.5 or 1.0 m from the fruit cluster about 2–4 weeks after anthesis in October to isolate the fruit from the rest of the tree. Each branch had 0, 5,10, 20 or 30 leaves, and 0, 5,10, 20 or 30 fruit. In a separate experiment, branches were cinctured 0.5 or 1.5 m from the fruit cluster in October, while uncinctured branches acted as controls. At Nambour in subtropical Australia (lat. 27°S), branches of ten year old ‘Souey Tung’ were cinctured in October after fruit set about 1.2 m from the fruit cluster, while other branches were cinctured and thinned to five leaves or five fruit per fruit cluster or left uncinctured and unthinned. In other experiments, seven year old trees of cv. Wai Chee and ten year old trees of cv. Kwai May Pink w... |
