Split application of nutrients improve growth and yield of Huanglongbing?affected citrus treeS

Citrus production in Florida declined steadily because of Huanglongbing (i.e., HLB, citrus greening) caused by the bacteria Candidatus Liberibacter asiaticus. The objectives study were to determine whether leaf tissue nutrient concentration, tree growth, fruit yield, and juice content improved with split applications essential nutrients on selected rootstocks sandy soils. treatments arranged a split-split plot design where nitrogen (N) was fertigated 20 splits Ca + Mg also three times coinciding spring, summer, late summer flush seasons trees budded two ‘Hamlin’ [Citrus sinensis (L.) Osbeck]. A significant difference N, calcium (Ca), magnesium (Mg) concentration detected between when received highest N rate remained within optimum range critical nutrition even lowest rate, suggesting lower requirement applications. Yet, minimum implying low soil pool. For Ca, Mg, treatments, we recorded 1.41×, 1.23×, 1.23× 1.22×, 1.26×, 1.30× greater canopy volumes (TCV) Cleopatra Swingle rootstocks, respectively, as compared control trees. Significantly yield for that either or treated 59.7 63.0 kg tree–1 (36.9 tree–1), respectively. magnitude 1.14× more average weight than noted rootstock response nutrition. Therefore, application has positive impact ameliorate growth deficiency associated asiaticus-induced problems, thereby improving yield.