Mahmood Moradi Chegeni; Ahmad Ali Shoushi Dezfuli; Mahmood Tohidi; Mehdi Sadeghi; Farbod Fotouhi
Abstract
One of the important activities to achieve drought tolerant cultivars is screening and selection of cultivars, based on yield and biochemical characteristics. A split-plot experiment arranged in a randomized complete blocks design with three replications has been carried out in Safiabad Agricultural ...
Read More
One of the important activities to achieve drought tolerant cultivars is screening and selection of cultivars, based on yield and biochemical characteristics. A split-plot experiment arranged in a randomized complete blocks design with three replications has been carried out in Safiabad Agricultural Research Center during two growing seasons (2017-19). The main plots are consisted of different irrigation regimes based on crop’s water requirement (25%, 50%, 75%, and 100%) and sub plots include five levels of alfalfa cultivars (Baghdadi, Nikshahri, Yazdi, Omid, and american Mesa-Sirsa). Results show that drought stress due to irrigation regimes have resulted in a significant reduction of forage dry matter yield and considerable changes of soluble sugar, glutation peroxidase, and catalase in alfalfa leaves. However, it has not greatly affected total protein. For forage dry matter yield, the highest statistical class belongs to Baghdadi cultivar under 100% water requirement supply treatment (2.824 t.ha-1). The lowest statistical class for forage dry matter yield has been observed in Yazdi and Mesa-Sirsa cultivars under 25% water requirement supply treatment (0.598 and 0.546 t.ha-1), respectively. Among the cultivars, examined in this experiment, Yazdi has been identified as a drought tolerant cultivar due to the stability of dry forage yield as well as high leaf antioxidants content.
Seyed Mehdi Mirbaqeri; Rouhollah Karimi; Mousa Rasouli
Abstract
In order to investigate the effect of foliar application of potassium sulfate (K2SO4; 0, 1.5 and 3 percent) and iron chelate (Fe-EDDHA; 0, 0.5 and 1 percent) on fruit set, fruit yield and quality, leaf mineral nutrient content, raisin yield and autumn and winter cold tolerance of ‘Bidaneh-Sefid’ ...
Read More
In order to investigate the effect of foliar application of potassium sulfate (K2SO4; 0, 1.5 and 3 percent) and iron chelate (Fe-EDDHA; 0, 0.5 and 1 percent) on fruit set, fruit yield and quality, leaf mineral nutrient content, raisin yield and autumn and winter cold tolerance of ‘Bidaneh-Sefid’ grapevine, a factorial experiment was done based on randomized complete blocks design in a commercial vineyard in Bahareh village of Malayer city during 2016-17. The highest fruit set percentage and yield was achieved in 1.5 percent of K2SO4 in combination with 0.5 percent iron chelate. Berries K, Fe and Mn concentration had a positive and significant correlation with fruit yield per vine. Raisin yield was found to be highest in combined treatments of 1.5 percent K2SO4 and 1 percent Fe-EDDHA and the lowest raisin yield was related to control vines. The highest autumn cold hardiness was recorded in K2SO4 (3%) × Fe-EDDHA (1%) treated vines. However, the highest winter cold tolerance was achieved in K2SO4 (3%) × Fe-EDDHA (0.5%) treated vines. The lowest cold tolerance was observed in control vines. There was a positive and significant correlation between cold tolerance and K content and negative correlation with Mg concentration. Totally, the highest fruit and raisin yields and their desirable qualities were obtained with K2SO4 and Fe-EDDHA at moderate concentration. However, the highest buds cold tolerance was obtained with the combination of these fertilizers at higher doses.
Majid Esmaeilizadeh; Azam Lotfi; Seyyed Hossein Mirdehghan; Mohammad Hossein Shamshiri
Abstract
In order to investigate the effects of irrigation intervals on pigments and biochemical components of four grapevine cultivars (Yaghooti-e-Ghermez, Askari, Sahebi and Keshmeshi-e-Sefid), an experiment was conducted with five irrigation treatments (3, 6, 9, 12 and 15 days interval) in four replications ...
Read More
In order to investigate the effects of irrigation intervals on pigments and biochemical components of four grapevine cultivars (Yaghooti-e-Ghermez, Askari, Sahebi and Keshmeshi-e-Sefid), an experiment was conducted with five irrigation treatments (3, 6, 9, 12 and 15 days interval) in four replications in greenhouse in 2012. The results of this experiment showed that irrigation intervals have effected on physiological and biochemical factors of grapevine cultivars. The amount of chlorophyll a, b and total chlorophyll in four cultivars were reduced with increasing irrigation intervals, and maximum reduction was observed in 15 days interval irrigation in four cultivars. The maximum and the minimum of chlorophyll a, b, total chlorophyll and carotenoids content were observed in ‘Sahebi’ at 6 days interval irrigation and ‘Askari’ at 15 days, respectively. Total soluble sugars, phenolic compounds and proline contents of leaves in all cultivars increased and leaf relative water content decreased with increasing diurnal irrigation. The maximum leaf relative water content and proline was observed in Sahebi cultivar and the minimum value was belonged to Yaghooti-e-Ghermez and Askari cultivars. Based on the results of this study, it seems that Sahebi cultivar had more tolerant in increasing irrigation intervals compared to Yaghooti-e-Ghermez, Askari and Keshmeshi-e-Sefid cultivars.
Majid Esmaeilizadeh; mohammadreza pourrajabi nejad; Hamid Reza Karimi; Aliakbar Mohammadi Mirik
Abstract
To investigative the effect of benzyladenine and eliminate of irrigation in winter on vegetative growthparameters and chemical composition of tree and nut quantitative characteristics of pistachio trees cv.Kaleh-Ghoochi, an experiment was done in 2010 to 2012 years. In this study, the effect of two irrigationregimes ...
Read More
To investigative the effect of benzyladenine and eliminate of irrigation in winter on vegetative growthparameters and chemical composition of tree and nut quantitative characteristics of pistachio trees cv.Kaleh-Ghoochi, an experiment was done in 2010 to 2012 years. In this study, the effect of two irrigationregimes includes irrigation and non-irrigation in winter combined with three levels of benzyladenine (0,20 and 40 mg L-1) was investigated. The experiment design was randomized complete block design withthree replications. The data obtained from both experiment analyzed as the combined analysis. Irrigationtreatment was done as similar as common irrigation program in orchard, and in non- irrigation treatment,there wasn’t irrigation from January to April in both years. Application of benzyladenine treatment wasdone at inflorescence buds swollen time. The results showed, 40 mg L-1 benzyladenine had the mosteffective on vegetative growth of trees compared with the other treatments. Also benzyladeninetreatments compared with the control had significant increase in the ecophysiological parameters; leavesbiochemical compounds contents, leaves nutrient elements concentration and caused reducing inpercentage of early splitting fruit and bud abscission significantly. Also, results showed that eliminationof irrigation in winter had no significant effect on the mentioned parameters. Thus, based on the results ofthis study it seems that elimination of winter irrigation doesn’t have any effect on vegetative growth anddevelopment of pistachio tree, but application of BA in late winter has positive effects.