نوع مقاله : مقاله پژوهشی
نویسندگان
1 استاد، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج
2 دانشجوی سابق کارشناسی ارشد، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج
3 دانشیار، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
In this study, the effect of 5 nutrient solutions containing different ratios of ammonium nitrogen to total nitrogen on quantity and quality properties of two apple varieties (Golabe-Kohanz and Granny Smith), were studied. One of the nutrient solution (number 1) had no ammonium nitrogen but the ammonium to total nitrogen ratios of other nutrient solutions were, 0.04, 0.07, 0.10, 0.14 meq/liters, respectively. Fresh weight, length, diameter and length to diameter ratio of fruits (shape of fruits), fruit firmness, pH, total soluble solids (TSS), titrable acidity (TA) and TSS / TA ratios were evaluated. When ammonium nitrogen increased in nutrient solutions there was no significant difference in fruits fresh weight and shape of fruits. While firmness, pH, total soluble solids significantly decreased when the ammonium to total nitrogen ratios increased in nutrient solutions.
کلیدواژهها [English]