چکیده مقاله
In arid and semi arid areas, salinity stress is one of the most serious global crop production problems Furthermore, 90% of oil demand of IRAN are supplied through imports In this regard, it is necessary to investigate the response of some oilseeds to salinity stress to identify salinity tolerant cultivars and achieve optimal yield In this study, to quantify the response of Nima and Zafar rapeseed cultivars, as well as the Soheil camelina cultivar to salinity stress at the germination stage, an experiment including 17 water salinity levels of 0 85, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32 dS m 1, each with three replicates was conducted at Tarbiat Modares University in 1398 Germination indicators were calculated using the SeedCalc package of the R software MATLAB software was used to fit the salinity models of Maas and Hoffman MH , van Genuchten and Hoffman HVG , Dirksen and Augustijn DA and Homaee et al HF to predict seed germination indices The salinity tolerance threshold of the final germination percentage index FGP for Soheil, Nima and Zafar cultivars is 32, 2, 4 dS m 1, respectively, and the reduction slope for Nima and Zafar cultivars is 1 14 and 1 84%, respectively Also, the salinity tolerance threshold of germination rate index GSI for Soheil, Nima, and Zafar is equal to 2, 2, and 0 86 dS m 1, respectively, and their reduction slope is equal to 2 4, 2 2 and 1 8% In addition to FGP and GSI indices, the salinity tolerance threshold of the seed vigor index for Soheil, Nima, and Zafar cultivars is 12, 4 and 8 dS m 1, and their reduction slopes are equal to 7 7, 1 7, and 3 5, respectively Based on all three indices of FGP, GSI and seed vigor, Soheil and Nima cultivars are tolerant to salinity, whereas the Zafar cultivar is moderately tolerant Among the models fitted to FGP, GSI and seed vigor indices, nonlinear models performed better than linear models due to the Sigmoid nature of the curve Linear MH model in FGP and GSI indices for Zafar cultivar because of trend linearity of the data provided good performance and in GSI and seed vigor indices, HVG and HF models had the best performance
کلیدواژهها
نویسندگان
Mansoureh Bayram
PhD of Irrigation and drainage, Tarbiat Modares University, Tehran, Iran
رزومه علمی کاربران
درباره سیویلیکاتبلیغات در سیویلیکاآمار علمی ایرانتقویم علمی ایرانداده کاوی مقالاتطرح های پژوهشی
شیوه ارجاع
در صورتی که می خواهید در اثر پژوهشی خود به این مقاله ارجاع دهید، به سادگی می توانید از عبارت زیر در بخش منابع و مراجع استفاده نمایید: Bayram, Mansoureh,1404,Quantitative Assessment of some oilseed response to salinity stress at the early growth stage,Fourth International Conference of Soil and Water Science Students,Tehran,https://civilica.com/doc/2624078
ارائهشده در
مجموعه مقالات چهارمین کنفرانس بین المللی دانشجویان علوم خاک و آب30 بهمن 1404 · تهران