128-1 Copper Sources in Citrus Seedlings Production.

Poster Number 1134

See more from this Division: S08 Nutrient Management & Soil & Plant Analysis
See more from this Session: Secondary and Micronutrients
Monday, November 1, 2010
Long Beach Convention Center, Exhibit Hall BC, Lower Level
Share |

Tatiana Merlin, Dep. of Crop Science., São Paulo State University, Crop Sciences College, Botucatu, Brazil and Sarita Leonel, Dep. of Crop Science., So Paulo State University, Crop Sciences College, Botucatu, Brazil
Copper sources in citrus seedlings production

Tatiana P.A. Merlin (1); Sarita Leonel (1)

(1)São Paulo State University, Crop Sciences College, Dep. of Crop Science.    

             CEP 18603-970 - Botucatu, São Paulo, Brazil. trpdalmeida@hotmail.com Tel +55 14 3811 7172.

In order to detect the best supply of copper to citrus seedlings, an experiment was carried out in a commercial nursery in the city of Botucatu, SP, Brazil. Commercial substrate of coconut fiber and five treatments were used: 1-control; 2-cupric oxychloride (1,8g L-1); 3-cuprous oxide (3 mL L-1); 4-chelated copper (0,04 mL L-1) and 5-copper sulphate (2,5 g L-1). The experiment was installed in July 2006 with the sowing of ‘Rangpur’ lime (Citrus limonia Osbeck) rootstock. After eight months, the plants were grafted with 'Valencia' orange (Citrus sinensis L. Osbeck). Monthly evaluations were made for plant height (cm), diameter of rootstock (mm) and dry matter of leaves and root (g). The statistical design was randomized blocks with five treatments and six replications. Each plot consisted of twenty plants. It was observed that the parameters analyzed for the copper-based treatments were not significant but it was possible to verify that treatment 3 (cuprous oxide) gave better plant growth followed by treatment 4 (chelated copper). As to copper content in leaves, although the concentrations obtained found were higher than indicated as excessive the plants did not show any abnormal symptoms, having a normal growth.

Keywords: copper, Citrus sinensis L. Osbeck, coconut fiber substrate

See more from this Division: S08 Nutrient Management & Soil & Plant Analysis
See more from this Session: Secondary and Micronutrients
Previous Abstract | Next Abstract >>