مقالههای Ehsan Zandi Esfahan
توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقالههای نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده میشوند.
۱An investigation on forage quality of two Legumes (Coro nilla varia and Medicago stiva) in Golestan National Park
اطلاعات انتشار: کنفرانس بین المللی توسعه با محوریت کشاورزی، محیط زیست و گردشگری، سال ۱۳۹۴
تعداد صفحات: ۸
Improvement of the traits related to forage quality including Neutral Detergent Fiber(NDF), Acid Detergent Fiber (ADF), and CP in forage species has a significant impact in increasing livestock production. In breeding programs that the number of samples is occasionally high, the use of chemical methods is time–consuming and costly. For this reason, NIR technology has been introduced as a rapid and accurate method in estimating chemical composition of agricultural products. This research was aimed to investigate the possibility of using this technology in estimation of NDF, ADF, and CP in Coronilla varia. A total of 45 samples of each species were selected during different phenological growth stages and from different vegetation types. CP was measured by Kjeldahl method and Coronilla varia method was applied to measure NDF and ADF. For NIR calibration, samples were divided into two categories, A part was considered for calibration and the rest for evaluating the accuracy of NIR in estimating the samples. All samples were irradiated by NIR wavelengths and the best regression equation was fitted between the chemical method and NIR based on statistical methods. According to the results, it could be concluded that NIR can be used as a rapid, accurate, and reliable method with enough potential to assess the quality traits in breeding programs<\div>
۲Comparison of Seed Characteristics in Even–aged Accessions of Atriplex canescens under Exclosure and Non–exclosure Conditions in Rangelands of Zarand–Shahriar, Iran
نویسنده(ها): Ali Mohebbi، Mohammad Jafari، Ali Tavili، Seyed Akbar Javadi، Ehsan Zandi Esfahan، Mehdi Ramezani
اطلاعات انتشار: ECOPERSIA، دوم،شماره۱، Winter ۲۰۱۴، سال ۰
تعداد صفحات: ۸
To compare the seed characteristics in accessions of Atriplex canescens under exclosure and non–exclosure conditions, two even–aged sites were selected with an area of 400 ha as the exclosure and 1000 ha as non–exclosure area. To conduct the study, 30 species were randomly selected in autumn 2009 in reference area of the sites and seeds were collected. Some important seed characteristics were studied in the laboratory. Data analysis was conducted using SPSS 17 software and mean comparisons were performed by Duncan''s Multiple Range Tests. Results showed that the winged seeds did not germinate under all studied treatments in both sites. Moreover, maximum seed germination was recorded for the seeds soaked in cold water for 24 hours and placed in the shade for 48 hours. According to the results of the independent t–test, no significant differences were observed for germination percentage, germination rate, and vigor index in both sites at both 1 and 5% probability levels. In other words, the seeds collected from the exclosure and non–exclosure areas were similar in terms of the mentioned characteristics. However, seed yield, 1000–seed weight and seed moisture content showed significant differences at 1% probability level with higher amount in exclosure area.
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