Resumo

COOMAN, Alexander; TORRES, Claudia  e  FISCHER, Gerhard. Determining the cause of cape gooseberry (Physalis peruviana L.) fruit cracking in greenhouse conditions. II. Effects of calcium, boron and copper supply. Agron. colomb. [online]. 2005, vol.23, n.1, pp.74-82. ISSN 0120-9965.

This study evaluated the effect of the presence and absence of calcium, copper and boron and their interactions on the cracking of cape gooseberry when cultivated in pots and under greenhouse conditions. Yield at harvest became reduced when calcium or copper were eliminated from nutrient solutions, whilst boron did not affect the amount of fruit harvested. The weight of individual fruits was positively affected by the absence of boron, whilst the opposite effect was observed for calcium; copper did not alter fruit weight. When the standard nutrient solution was applied (including all elements) fruit cracking was very high during the first weeks and became lower later on during the harvesting period. Fruit cracking was a function of the presence of calcium and boron in the nutrient solution; the absence of each of these elements increased the amount of cracked fruits from 5.5% to 13%. Copper had no effect on fruit cracking. Fruit size, although significant, had a very small correlation with fruit cracking

Palavras-chave : Nutrition; ferti-irrigation; harvest; cell wall; epidermis.

        · resumo em Espanhol     · texto em Espanhol     · Espanhol ( pdf )