Soil contamination with heavy metals such as arsenic has harmful effects on human health and agricultural products. Arsenic (AS) is one of the heavy metals which are highly toxic and carcinogenic. This research was conducted to study the effect of organic manure on increasing the Arsenic absorption ability by Cress plant in the greenhouse of the Agriculture and Natural Resources Research Center, Khuzestan, Iran, according factorial experiment based randomized completely design with three replications. Main factor included two levels of organic substance (0 and 10 tons per hectar) and three levels of arsenic concentration (0, 20 and 40 ppm) belonged to sub factor. Mean comparison result revealed increasing arsenic concentration led to increase arsenic accumulation in shoot plant (14.1 ppm), also this trend seems in transfer coefficient trait so cress can be used as a purifier plant to reduce arsenic contamination of the soil. It need to mention by increase arsenic concentration, shoot dry weight decreased (0 ppm arsenic concentration had 20.1 gr per flowerpot but 40 ppm treatments had 0.7 gr). Finally according to contamination symptoms (Necrosis and chlorosis) on cress plant at 40 ppm concentrations and reduced plant shoot dry weight at this concentration, it is recommended to use the cress plant for purification of soil contaminated less than 40 ppm arsenic concentrations. It is noteworthy advised according plant's ability to absorb arsenic and other heavy elements, sowing of this plant as food should be avoided in the contaminated fields. پرونده مقاله

BACKGROUND: Overuse of fertilizers can lead to groundwater contamination, depletion of soil microorganisms and beneficial insects, increased crop susceptibility to diseases, acidification or alkalization of soil, damage to soil structure, reduced organic matter and soil fertility. Therefore, for achieve sustainable agricultural, it is necessary to reduce the consumption of conventional fertilizers. OBJECTIVES: Current study was conducted to assess effect of different level of nitrogen fertilizer and livestock manure on crop production and protein percentage of maize. METHODS: This research was arranged via factorial experiment based on randomized complete blocks design with three replications. The treatments included nitrogen fertilizer (F1= none use of fertilizer or control, F2= 50% less than soil test or 90 kg.ha-1, F3=equal soil test or 180 kg.ha-1, F4=50% more than soil test or 270 kg.ha-1) and livestock manure (M1=none use of manure or control, M2= 20 t.ha-1). RESULT: According result of analysis of variance interaction effect of treatments on all measured traits was significant. Assessment interaction effect of treatments indicated maximum number of seed per row (42), number of row per ear (16), 1000-seed weight (280 gr), seed yield (9900 kg.ha-1) and protein concentration (10.5%) was noted for 180 kg.ha-1 nitrogen (equal soil test) with 20 t.ha-1 livestock manure and minimum of those belonged to control treatment. Comparison of different levels of nitrogen treatments showed that application of fertilizer equal soil test (180 kg.ha-1) caused 22.5% increase in number of seed per ear, 13.69% number of row per ear, 25% 1000 seed weight, 20.2% seed yield and 20.29% protein percentage were compared to control. CONCLUSION: Finally based on result of this research use 180 kg.ha-1 nitrogen fertilizer (equal soil test) and 20 t.ha-1 livestock manure improve quantitative and qualitative traits of corn and can be advised to farmers. پرونده مقاله

This research was conducted to evaluate the trend of cadmium accumulation in wheat tissue and cultivated soil affected conventional cropping systems and different growth stage via split plot experiment based on randomized complete block design with three replications during 2014-2015 seasonal year. The main factor included two cropping systems (wheat-rice, fallow-wheat) and growth stage at three level (Tillering, flowering and ripening) belonged to subplots. ANOVA results indicated that the effect of different cropping systems and growth stages on soil and crop cadmium concentration traits was significant at 1% probability level, but interaction effect of treatments was not significant, also soil phosphorus content only affect cropping systems at 5% probability level. Compare effect of cropping systems on cadmium accumulation in cultivated soil and wheat tissue have similar trend (Ascending to descending). In other words the rice-wheat cropping system has more amounts of cadmium (1.71 mg.kg-1 in soil and 1.83 mg.kg-1 in wheat tissue) than to fallow-wheat cropping pattern (1.37 mg.kg-1 in soil and 1.32 mg.kg-1 in wheat tissue). Compare cadmium accumulation between soil and wheat crop tissue revealed an opposite trend. Because of leaching and absorb by plants, trend of soil cadmium accumulation from tillering to ripening stage had down trend. But crop cadmium accumulation due to developed biomass and absorb cadmium had risen trend. Finally management fertilizer consumption of cultivated field according result of soil test and use of phosphate fertilizers by attention to the standards of soil and water research institute led to reduced cadmium accumulation in crop tissue. پرونده مقاله

BEHNAM HAJJARI1, EBRAHIM PANAHPOUR2*, ALI GHOLAMI21- Department of Soil Science, Khouzestan Science and Research Branch, Islamic Azad University, Ahvaz, Iran2 , 3- Department of Soil Science, Collage of Agriculture, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran*Corresponding author E-mail: e.panahpour@gmail.comReceived: Received:Received:Received: Received:Received:Received: 7 July 20147 July 20147 July 2014 7 July 2014 7 July 20147 July 20147 July 20147 July 20147 July 2014 Accepted: Accepted: Accepted: Accepted: Accepted: Accepted: Accepted: 20 November 201420 November 201420 November 201420 November 2014 20 November 201420 November 201420 November 201420 November 201420 November 201420 November 2014 20 November 201420 November 201420 November 201420 November 2014 Abstract This study was carried out in farm of Dehkhoda institute (2013-2014). The study was done as randomized complete blocks design with five potassium sulfate amounts (0, 50, 100, 150 and 200 kg/ha) and four replications. According to results, potassium affected the number of stalk numbers, yield, and the amount of obtainable sugar (p < 0.01) and purity (P < 0.05). The highest stalk numbers (186351), yield (111.62 ton/ha), obtainable sugar (10.86 %), and purity (89.9%) were obtained in 200 kg/ha potassium. Results showed that the amount of potassium in the mentioned region is not sufficient and adding potassium as potassium sulfate will increase the qualitative-quantitative yield of sugarcane. پرونده مقاله

Maryam Zaheri1, Ali Gholami1*, Habibollah Nadian2, Ebrahim Panahpour1 1- Department of Soil Science, College of Agriculture, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran 2- Department of Soil Science, College of Agriculture, Ramin Agriculture University, Ahvaz, Iran * Corresponding Author: a.gholami@iauahvaz.ac.ir Received: 22 May 2015 Accepted: 21 June 2015 Abstract Wheat is one of the main resources of human food. Lodging is one of the most important factors that occurs in various regions and reduces wheat growth and yield. Therefore to study the effect of potassium and zinc application on resistant to lodging of two wheat cultivars, an experiment in a split-plot arrangement based on randomized complete block design (RCBD) in three replications was conducted in Dezful Agricultural Research Station at 2013-2014. The main plot was the use of the micronutrient zinc at three levels (0, 30, and 60 kg.ha-1 of zinc sulfate), and the sub plot was potassium application at four levels (0, 100, 200, and 400 kg.ha-1 of potassium sulfate). The results showed that zinc and potassium application increased their absorption by 90.34% and 34.96%, respectively, compared to the control. Moreover, the fiber content was 5.89% more compared to the control. Application of these elements had no significant effects on cellulose content, although its content was 3.47% higher than the control. The lignin content also rose by 60.51% compared to the control, and zinc at 30 kg.ha-1 and potassium at 400 kg.ha-1 reduced lodging percentage. پرونده مقاله

Abstract Boron (B) is a necessary micronutrient for higher plants and plays a part in germination and pollen tube growth. The purpose of this research was to determine the best levels of B spray on Tagetes flowers and to study the effects of these sprays on number of flower buds and flowers in short-stemmed Tagetes. A pot experiment in completely randomized design with 3 replications was conducted that included 4 B spray treatments (control: T0, 0.5 PPt: T1, 0.75 PPt: T2, and 1 PPt: T3). Results indicated that maximum number of flower buds belonged to the T3, followed by T2, and T1 treatments with 67.06, 63, and 43.71% increases in the number of flower buds, respectively, compared to the control. Moreover, B sprays at 1, 0.75, and 0.5 PPt yielded the largest number of flowers (1.55, 1.22, and 0.65, respectively). Therefore, B spray at 1 PPt yielded the best results in this research. پرونده مقاله