Prognosis of nutrient status and vegetative vigor in peach trees by floral analysis
2008
Mirabdolbaghi, M. (Horticulture Research Department Seed and Plant Improvement Inst., Karaj (Iran)) | Zarghami, R. (Agricultural Biotechnology Research Inst. of Iran, Karaj (Iran))
Iron-chlorosis is an important problem in peach trees in calcareous soils of Iran and affects over 60% of Iranian soils. The purpose of this investigation was to prognosticate nutrient status and vegetative vigour of Redhaven peach tress grafted on GF677 and Missouri rootstocks in a lime soil such as Kamalabad soil in Karaj. The experiment was conducted in a Randomized Complete Block Design with 3 replications. Two rootstocks (GF 677 & Missouri) were considered as treatments. Relationship among different indices of flowers and leaf parameters (leaves were gathered at 120 days after full bloom) and vegetative characters were studied by linear regression analysis. Data were analyzed using least significant difference test (LSD). The results showed that the most important factor for predicting leaf chlorophyll concentration of Redhaven cultivar on GF677 rootstock was flower-Fe content and for those grafted on Missouri rootstock was flower-Zn content. Differences in leaf chlorophyll concentration between treatments were not significant, while Fe content in flowers and leaves of Redhaven on Missouri rootstocks was significantly higher. The data presented also suggest that some of indices of flowers (mineral concentration in flowers and dry & wet weight of flowers at fullbloom time) could be considered as prognosis tools for an early estimation of vegetative vigour of peach trees.
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