Nutrient uptake in 'Venus' grape vine grafted onto different rootstocks during two growing seasons

Abstract

The current study aimed to assess the influence of the 'IAC 766', 'IAC 572', 'IAC 313' and 'IAC 571-6' rootstocks on nutrient uptake of 'Venus' grape vine by pruning branches and harvesting clusters during two consecutive grape growing seasons. The experiment was conducted in Votuporanga, state of Sao Paulo. Treatments consisted of the variety 'Venus' grafted onto four rootstocks during two growing seasons (2013 and 2014). The rootstocks evaluated were 'IAC 766', 'IAC 572', 'IAC 313' and 'IAC 571-6'. We sampled the grape branches at pruning and their clusters at harvest time. The macro and micronutrient contents in both branches and clusters were analyzed. Nutrient uptake and removal were separately estimated in pruned branches and harvested clusters by uptake nutrient sum. Results indicated great nutrient uptake means in 'IAC 572' and 'IAC 766' during both seasons. Moreover, total removal uptake showed the following order K > N > Ca > P > Mg > S > Mn > Fe > Zn > B > Cu in pruned branches and harvested clusters.