In order to study the nectar quantity and quality of some onion cultivars and honeybees foraging activity on them, a complete randomized block design with three replications was conducted. Ten selected onion cultivars consisting of Ghom, Kashan, Azarshahr, Dorcheh, Tarom, Kazeroon 1, Kavar, Abarkooh, Hurand, and Yellow Sweet Spanish were used. Sixty mm mother bulbs of different onion cultivars ...

Background and purpose: Heavy metal pollution has always been a major cause of environmental contamination and is considered as a major concern for food health. Rice is the most popular food among Iranians and the presence of heavy metals in trace level in rice has received special attention because they are directly related to health .In this study, the amount of Pb, Cd and Cr in Tarom rice fa...

Background and purpose: Cereals are the most important components of a healthy diet. Rice is one of the most common consumed grains in the world and a staple food of people in everyday meals. This study aimed at introducing a novel analytical approach in investigation of harmful metals and necessary elements in some types of Iranian rice by using Laser Induced Breakdown Spectroscopy (LIBS) meth...

Rice (Oryza sativa L.) is providing food of half of the world population, and in some regions salinity stress reduces yield of this plant. In order to develop planting of rice in regions with saline water or fields, chlorophyll rate, chlorophyll fluorescence indices and grain yield of some rice cultivars were evaluated in summer, 2012, at the farm of college of Agriculture, at Yasouj University...

The vein-type mineralization of the base (Zn, Pb, and Cu) and precious metals (Au) in the Qarah Changel area (northwest of Qazvin) is located in the southern part of the Tarom-Hashtjin metallogenic belt. Volcanic (trachy-andesite, rhyolite and dacite) and pyroclastic (tuff, tuffite and tuffaceous shale) (Eocene) rocks are the hosts of this mineralization. Distinctive alterations around minerali...

Salinity is an important limiting factor in the production of more plants, including rice. Due to the limited amount of cultivated area, identification of tolerant genotypes to environmental stresses and especially salinity is very important. The aim of this study was to investigate the genetic diversity among 114 recombinant lines derived from the intersection of local Tarom × Khazar cultivars...

در این تحقیق 98 ژنوتیپ داخلی و خارجی برنج از نظر مقاومت به کرم ساقه­خوار نواری برنج، chilo suppressalis، در شرایط مزرعه­ای در مؤسسه تحقیقات برنج در مازندران-آمل غربال شدند. آزمایش در قالب طرح بلوک­های کامل تصادفی در 3 تکرار انجام شد. در مرحله­ی زایشی گیاه برنج از هر کرت 5 بوته به­طور تصادفی انتخاب و کف­بر شدند. سپس درصد خوشه­های سفید شده، تعداد لارو بر بوته، ارتفاع بوته، قطر ساقه و تعداد ساقه د...