Journal of Crop Ecophysiology: 1 (20)

Open Access Article

1 - Response of Some Grain Sorghum Genotypes to Water Deficit
S. Aharizad S. Shahbazi A. Mohammadi A. Fouman Ajirlo M. Noruzi

To study the effect of drought stress on some grain sorghum lines, a split plot experiment based on complete randomized block design with three replications was conducted during 2007-8 at the Agriculture Research Field of Islamic Azad University, Tabriz Branch, Iran. Ir More

To study the effect of drought stress on some grain sorghum lines, a split plot experiment based on complete randomized block design with three replications was conducted during 2007-8 at the Agriculture Research Field of Islamic Azad University, Tabriz Branch, Iran. Irrigations after 60, 120 and 180 mm evaporation from the pan were assigned to main plots and seven lines of grain sorghum to sub plots. Multivariate analysis of variance was fulfilled for fixation of type Ι error. Analysis of variance showed significant differences among lines and irrigations for most of the traits. Based on mean comparison, KGS5 and KGS15 showed the highest means for most of the yield related traits. Path analysis was conducted by using the stepwise regression on mean of irrigation levels. Results showed that panicle length and 1000 kernel weight were the most effective components on grain yield. Manuscript profile

Open Access Article

2 - The Effects of Irrigation Regimes on Second Cropping of Three Soybean Genotypes in Moghan Region
M. Rostamzadeh Kaleybar, M. Farboodi A.H. Hoseinzadeh Moghbeli N. Razmi

To determine the effects of different irrigation regimes on second cropping of three soybean genotypes (Glycine max L.), an on farm split plot experiment based on randomized complete block design with 3 replications was carried out at Moghan Agricultural and Natural Res More

To determine the effects of different irrigation regimes on second cropping of three soybean genotypes (Glycine max L.), an on farm split plot experiment based on randomized complete block design with 3 replications was carried out at Moghan Agricultural and Natural Resources Center during summer, 2010. The seeds were planted in a plot with 6 rows 60 cm wide, 250 cm length and plants 3 cm apart on the rows. The main plots comprised 4 irrigation regimes: I1=60 mm, I2=90 mm, I3 =120 mm and I4=150mm evaporation from class A pan) and sub-plots soybean genotypes (Williams, Linford and L17). The traits recorded were plant height, number of nodes, pods and seeds per plant, 1000 seeds weight, seed yield, height of first pod, number of empty pods, leaf number, lateral branches number (productive), pods length, inter-nodes distances, chlorophyll content, stem weight, pods weight, green leaf and roots  weights. Analysis of variance of the data showed that there were significant differences among characters (like plant height, node number, pod number, inter node distance, pods weight, chlorophyll context volume and roots weight) and irrigation treatments The I1 treatment had the highest yield and node number, while the I4 treatment resulted in the least plant height and nodes number. Also I2 treatment produced the highest pods number while the treatments I4 resulted in the least pot number. Highest chlorophyll content was obtained under I4 treatment but under I2 treatment it was the least. The highest pod weight was obtained from I3 treatment and it was the least under the I4 treatment. The highest root weight was resulted from using I2 treatment and the lowest from I4. Also, ANOVA showed significant differences for plants height and inter nodes distances among genotypes (p<0.01). The highest plants and longest inter-nodes belonged to Linford and the shortest to L17. There were positive and significant correlation between yield and 1000 seed weight (p<0.01). Manuscript profile

Open Access Article

3 - Effect of number of planting rows in strip intercropping of maize, pintobean and soybean and their sole cropping on seed yield
F. Farahvash, A. Rahmati F. Jafari H. Amir Hallaji

To evaluate the effects of rows of maize-pintobean, maize-soybean planted in strip intercropping and their sole croppings, an experiment using randomized complete block design with three replication, was conducted for two consecutive years at the Agricultural Research C More

To evaluate the effects of rows of maize-pintobean, maize-soybean planted in strip intercropping and their sole croppings, an experiment using randomized complete block design with three replication, was conducted for two consecutive years at the Agricultural Research Center of Islamic Azad University, Tabriz branch. Treatments were: A (intercropping of maize-pintobean, one row of each, B (intercropping of maize-pintobean, two rows of each), C (intercropping of maize-pintobean, three rows of each), D (intercropping of maize-soybean, two rows of each), E (intercropping of maize-soybean, two rows of each), F (intercropping of maize-soybean, three rows of each), G(sole cropping of maize), H (sole cropping of pintobean) and I (sole cropping of soybean). Experimental results showed that maize produced, in both years, highest (17818 kg/ha) using treatment D and lowest (15509 kg/ha) yields in treatment G. This indicates that maize produced higher yield in intercropping than sole cropping. Maize, also, produced highest yield in treatment D and lowest in treatment F. Pintobean had highest yield (2498 kg/ha) in treatment H and lowest (2073 kg/ha) in treatment A. Soybean, on the other hand, produced highest yield (4794 kg/ha) in treatment I and also lowest (3257 kg/ha) in treatment D. A a whole, it may be concluded that pintobean and soybean produce higher yield in sole cropping as compared to intercroppings.  Manuscript profile

Open Access Article

4 - Effect of Supplementary Irrigation and Foliar Application of Zinc Sulfate on Seed Yield and its Components of Chickpea in Arak, Iran
V. Borzabadi I. Farahani

To consider supplementary irrigation and application of different level of Zinc sulfate on yield and yield components and some physiological traits of chickpea c.v. "Hashem", this research was This study carried out in a split plot experiment based on randomized complet More

To consider supplementary irrigation and application of different level of Zinc sulfate on yield and yield components and some physiological traits of chickpea c.v. "Hashem", this research was This study carried out in a split plot experiment based on randomized complete block design with four replications at the Research Farm of the Islamic Azad University of Arak.. Treatments applied consisted of two levels (supplementary irrigation and rain-fed condition) and three rates of the foliar zinc sulfate application (12, 24 and 36 grams). Results showed that the effects of supplementary irrigation and foliar application of fertilize grams/liter on seed yield and biological yield were significant at 1% level of probability. Highest seed yield (567.2 kg/ha) was obtained from applying supplementary irrigation. Manuscript profile

Open Access Article

5 - Evaluation of the Response of Bread Wheat Genotypes to Supplementary Irrigation with Respect to Grain Yield and some Agronomical and Physiological Traits
M. Kheiri M. Roostaei E. Zadhassan R. Dastbari R. Eslami M.B. Khorshidi Benam

In order to study the effect of supplementary irrigation on grain yield of 20 advanced bread wheat lines from population of recombinant inbred lines, selected from Azar2/87Zhong291, this experiment was conducted using randomized block design with three replications unde More

In order to study the effect of supplementary irrigation on grain yield of 20 advanced bread wheat lines from population of recombinant inbred lines, selected from Azar2/87Zhong291, this experiment was conducted using randomized block design with three replications under supplementary irrigation during 2008-09 seasons at the Dryland Agricultural Research Institute (DARI) of Maragheh. Characters under study were: days to heading, plant height, days to maturity, 1000 kernel weight, tiller number, spike length, seed number per spike, spikelet number per spike, peduncle length, leaf sheath length, grain and biologic yields. Analysis of variance revealed significant differences among genotypes with respect to the most of the traits studied. Results showed that the lines No. 4 and 16 with 3400 and 3680 kg/ha grain yield were significantly superior under supplementary irrigation conditions. Based on the results the traits such as leaf sheath length, seed number and spike weight, tiller number and HI showed positive and significant correlation with grain yield. Path analysis indicated that leaf sheath length, seed number per spike and 1000 kernel weight were important traits to select lines for high yield potential under supplementary irrigation condition, but days to maturity showed negative effect on grain yield. As a whole, the line no. 16 (Azar2/78Zhong291-53) with high yield (3680 kg/ha) under supplementary irrigation, early maturity, 1000 kernel weight and HI, can be selected as a suitable genotype. Manuscript profile

Open Access Article

6 - Evaluation of the Effect of Flower Removal and Size of Mini-Tuber on the Yield and Yield Components of Agria Potato Cultivar by Using Two Methods of Planting
M. Goldust Jelodar M.B. Khorshidi Benam D. Hassanpanah Sh. Azizi

In order to evaluate the effect of flower removal and sized of mini-tuber size on the yield and yield components of Agria potato cultivar by using two methods of planting, a factorial experiment based complete randomized blocks design with three replication was conducte More

In order to evaluate the effect of flower removal and sized of mini-tuber size on the yield and yield components of Agria potato cultivar by using two methods of planting, a factorial experiment based complete randomized blocks design with three replication was conducted in Ardabil, Iran.  Factors consisted of as two planting methods (planting mini-tuber planting in the furrow and on the ridge). B: four mini-tuber seedling sizes (5, 15, 25 and 35 mm in diameter) and C: (flowers were intact or removed. During the growing period and after harvesting the attributes measured were main stem number per plant, plant height, tuber number per plant, tuber weight per plant, marketable tuber yield and total tuber yield. The result of variance analysis showed that there were significant differences between planting methods and treatments of flower concerning yield. The results indicated mini-tuber seedling sizes at 15, 25, and 35 mm in both planting methods resulted in higher yield. The planting in furrow yieled better as compared to ridge planting. There was significant difference between flower removal as compared to that of intact ones. The linear correlation showed significant and positive relationship between total tuber yield with plant height, tuber number per plant, tuber weight per plant and marketable tuber yield. According to the results, the mini-tuber size by 15 and 25 mm and planting in furrow and flower removal produced highest number of tubers and tuber weight per plant, marketable tuber yield and total tuber yield.  Manuscript profile

Open Access Article

7 - Comparison and Classification of Lentil (Lens culinaris) Landraces under Drought Stress Conditions after Flowering
V. Rashidi S. Chalabi Yani M. Sharifi N. Effatdust

In order to compare and classify of 15Iranian lentil landraces under drought stress conditions after flowering, an experiment was carried out in split plot lay out based on randomized complete block design with four replications. It was performed at the Agricultural Res More

In order to compare and classify of 15Iranian lentil landraces under drought stress conditions after flowering, an experiment was carried out in split plot lay out based on randomized complete block design with four replications. It was performed at the Agricultural Research Station of Islamic Azad University, Tabriz Branch, during the cropping year of 2011. The primary factor consisted of drought stress treatments at 2 levels (non stress and stress after flowering) and secondary factor of 15 lentil landraces. Analysis of variance indicated remarkable diversities among the landraces under study and significant differences for interaction of genotype by drought stress levels were obtained for most of the traits measured. Grain yield and number of grains per plant were highly influenced by drought stress. Mean comparisons also showed significant variations among the landraces for number of pods per plant, number of grains per plant, 100- grain weight, hecto liter weight, biological yield, grain yield and harvest index. Drought stress also reduced of plant height, number of pods per plant, number of seeds per plant, 100- seeds weight, hectoliter weight, biological yield, grain yield and harvest index of the lentil landraces under study. Correlation coefficients revealed that, number of seeds per plant and harvest index had significant and positive effect on seed yield under drought stress. Cluster analysis, based on the traits studied, divided the landraces into three groups. In this classification, the landraces of Kaleybar, Garadagh, Kharvana, Horand Danehriz and Shomale Varzegan were distinguished as superior landraces under drought conditions.   Manuscript profile

Open Access Article

8 - Effect of Osmotic Stress on Seed Germination Indices of Nigella sativa and Silybum marianum
حمیدرضا Balouchi A. Yadavi M. Movahedi Dehnavi

Evaluation of medicinal plants to drought and salt stress tolerance, in an attempt to plant them under drought and saline regions, is of utmost importance. Environmental stresses, especially drought and salt, reduce the global crop yields more than other factors. Select More

Evaluation of medicinal plants to drought and salt stress tolerance, in an attempt to plant them under drought and saline regions, is of utmost importance. Environmental stresses, especially drought and salt, reduce the global crop yields more than other factors. Selection of drought tolerant crops at germination stage, usually is, the fast and low cost method. In order to study the effect of osmotic stress on germination indices of black cumin and milk thistle, an experiment carried out in a completely randomized design with four replications at the Seed Technology Laboratoary of Yasouj University in 2008. Treatments were 0 (as control), -2.4, -4.8, -7.2 and -9.4 bar osmotic potentials created by using PEG 6000. Results showed that, decreasing of osmotic potential reduced speed of germination and its percentage, root and shoot lengths and dry matter in these two plants. Black cumin showed higher tolerance, to -4.8 bar osmotic potential, as compared to milk thistle. However, milk thistle showed higher tolerance to drought stress, up to this osmotic potential (-4.8 bar), compared to black cumin. Milk thistle had lower germination speed and percentage at higher drought stress as compared to black cumin. Generally, milk thistle showed better growth and survival than black cumin due to its higher root and shoot length and dry matter. Manuscript profile

XML

List of Articles