فهرست مطالب s. jahanbakhsh

For identification of correlations and relations among different traits in bread wheat, 30 genotypes were investigated based on a split plot experiment in the form of randomized complete block design with three replications under normal and moisture stress conditions during the 2016-2017 crop season. The results of the analysis of variance showed that the effect of genotypes was significant for most of the studied traits. The interaction effect of drought stress and genotype was significant for all examined traits except 1000-grain weight. Genotypes c-94-3 and Heidari were recognized as the best genotypes with average grain yield of 437 and 427 g/m2, respectively, in normal conditions. Under drought conditions, genotypes cd-4 and cd-6 had the lowest grain yield with an average of 104 and 108 g/m2, respectively. Based on the results of multiple regression in field experiment, under optimal irrigation conditions, flag leaf area, spike density,  number of days to 50% flowering and spike length, (R2= 0.466) and under stress conditions, grain filling rate, grain filling period and straw yield (R2= 0.736) were considered as important traits affecting grain yield.  Path analysis of grain yield under normal conditions indicated that the flag leaf area, spike density and spike length, and under stress conditions, the grain filling rate, grain filling period and straw yield, with the greatest direct positive effect were the important and effective traits in grain yield. Based on the results of the analysis of the grain yield correlation coefficients under normal condition, the number of kernels per spike, 1000-grain weight, flag leaf area, spike density and spike length, and under stress conditions, the number of kernels per spike, the grain filling rate, grain filling period and straw yield, were considered as the traits affecting grain yield.

In order to study effect of salinity and drought stress on germination and Seedling growth and fitness model hydrotime and threshold tolerance to salinity in two different species Basil, a factorial experiment in a randomized completely design was conducted at University of Mohaghegh Ardebili in 2015. Experimental treatments included was two species of basil (Purple basil and Red basil), different salts (Manitol, NaCl+K2SO4, K2SO4 and NaCl) and different potentials (0, -3, -6 and -9). Model output result showed, germination rate in drought stress coundition on Red basil (θH= 37.32) highest than Purple Basil (θH= 37.32) and uniformity of germination in purple basil (σψb=3.37) less than Red basil (σψb=1.44). Also Red basil higher tolerance drought compared with Purple basil. Threshold tolerance to salinity in germination stage showed, in Purple Basil at NaCl, K2SO4 and NaCl+K2SO4 had threshold tolerance -0.59, -0.13 and -0.87 bar and in Red Basil equle -0.31, -0.25 and -2.88 . Salinity and drought stress were causing reduced in the seedling growth and seed vigor index. The most (0.92) and least (0.78) on the use of the reserves in the case of purple basil of NaCl and NaCl + K2SO4, respectively, was observed at the same time. This is while that, the highest use of the reserves on the red basil K2SO4 salt and least amount was obtained application of NaCl. The highest vigor weight index of purple basil was observed of zero osmotic potential. The least weight index purple basil was obtained of the potential -9 bar Mannitol.

The city of Yazd is chosen as a sample for studying the principle and methods ofclimatic designing in arid and semi-arid regions. After represnting some climaticcharacteristics of the city, we have paid attention to the human bioclimatic aspectsaccording to Terjung Model and the specification of monthly physiologic climate. Theresults indicate that only in October and April there has been dominant the diurnalthermal comfort conditions, while in May and September, such conditions have beenprovided in lower rates. In June, July and August, there is very rigid bioclimaticcondition due to hot weather, and finally in December, January, and February, therehave been hard biological conditions owing to the cold. In the next section, we havestudied principles of climatic design of bilding based on the Mohoney method andthereby the architectural setting have been presented according to the Glvoni structuralbioclimatic table. In the last section of this study, using the Sun path diagram, lightpermittingprinciples of buldings were presented for the city of Yazd.