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- W2340341403 abstract "Iron (Fe) chlorosis is a widespread problem in fruit crops grown on calcareous soils. To date, the application of synthetic Fe chelates is the most effective solution to correct this problem. The aim of this work was to study the effectiveness of a new synthetic Fe chelate, HJB (N,N'-Bis(2-hydroxy-5-methylbenzyl) ethylenediamine-N,N'-diacetic acid), in providing Fe to nectarine trees grown under alkaline field conditions. HJB has a similar structure as o,oEDDHA but its synthesis may produce purer commercial products than the EDDHA process that produces o,oEDDHA combined with a mixture of regioisomers (o,pEDDHA and p,pEDDHA) and other unknown by-products. The experiment started in 2007. Nine-year-old nectarine cultivar 'Zephyr' trees (Prunus persica L. Batsch) grafted in GF677 rootstocks were used. Two treatments with two different doses (0.45 g Fe-chelate/tree and 0.90 g Fe-chelate/tree) were evaluated: a commercial EDDHA/Fe 3+ product (5.19% Fe chelated by o,oEDDHA), HJB/Fe 3+ (7.97% Fe chelated by HJB) and an untreated (-Fe) control. The Fe compounds of the +Fe treatments were apportioned into three unequal doses that were directly injected into the soil three times during the growing season. SPAD index values were measured every two weeks and leaves were sampled 36, 58, and 91 days after the first application of the +Fe treatments. Yield, fruit weight, number of fruits per tree, and fruit diameter were also determined. In the first year, HJB/Fe 3+ and EDDHA/Fe 3+ improved SPAD values compared to the -Fe control; however, no significant differences were found with respect to leaf Fe concentration or fruit yield of the +Fe treated and -Fe control trees. Currently, a second year of experimentation is being developed." @default.
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- W2340341403 date "2010-06-01" @default.
- W2340341403 modified "2023-10-14" @default.
- W2340341403 title "EFFICACY OF HJB/FE3+ TO PROVIDE FE TO NECTARINE PLANTS IN CALCAREOUS SOILS" @default.
- W2340341403 doi "https://doi.org/10.17660/actahortic.2010.868.32" @default.
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