Growth, nutrient status and yield of le-conte pear trees as influenced by some organic and biofertilizer rates compared with chemical fertilizer
2010
Mohammed, S.M. | Fayed, T.A. | Esmail, A.F. | Abdou, N.A.
This investigation was carried out during the 2006 and 2007 growing seasons on a 3 year old Le-Conte pear trees (Pyrus communis L. X Pyrus pyrifolia N. ) grafted on Pyrus betulaefolia rootstock and planted at 5 x 5 meters apart (169 trees / faddan ) in sandy soil under drip irrigation system, at El-Kassasien Horticultural Research Station, Ismailia Governorate. One source of organic fertilizers (compost) plus natural rocks (rock phosphate + feldspare), with or without biofertilizers (phosphorein and biogein) plus humic acid plus compost tea, were compared with chemical fertilization. Application of compost with biofertilizers plus humic acid plus compost tea gave a better effect on all vegetative characteristics (growth rate of trunk diameter, shoot diameter, shoot length, number of leaves per shoot and leaf area) and chemical leaf constituents (leaf pigments, macro and micro elements, total carbohydrates, C/N ratio, protein contents) and yield compared to other organic treatments. Also vegetative growth, nutritional status and yield were significantly increased from the first till the second season indicating the accumulation effect of organic manure plus biofertilizers plus humic acid plus compost tea. Chemical fertilizer gave the highest vegetative and yield characteristics and leaf chemical contents compared to all organic rates with or without biofertilizers, humic acid and compost tea in the two seasons of study.
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