Journal of Crop Nutrition Science: 5 (4)

Open Access Article

1 - Evaluation Effectiveness of Chemical and Biological Fertilizers Combination on Corn (Zea mays L.) Yield
Nastaran Ajami

In order to investigate the appropriate combination of chemical and bio-fertilizers and their effectiveness on corn seed yield while defoliating the upper leaves of the ear, a randomized complete block design experiment with four replications. Fertilizer treatments were More

In order to investigate the appropriate combination of chemical and bio-fertilizers and their effectiveness on corn seed yield while defoliating the upper leaves of the ear, a randomized complete block design experiment with four replications. Fertilizer treatments were applied at four levels including 100% urea, 75% urea + 100% Nitroxin, 50% urea + 100% Nitroxin, 25% urea + 100% Nitroxin. In harvest stage the traits such as seed yield, biological yield, harvest index, 1000-seed weight, number of seeds per row, number of rows per ear, and number of seeds per ear were calculated. The results showed that the effect of fertilizer combination on studied traits was not significant. Although there was no significant difference between the means of seed yield, number of row per ear, number of seed per row, number of seed per ear, and biological yield, the maximum rate of traits belonged to the treatment with 50% urea + 100% Nitroxin by 11.52 t.ha-1, 14.82, 36.85, 547.59, and 21.30 t.ha-1, respectively. In general results showed that application of bio-fertilizer in corn even when the upper leaves of ear are defoliated along with optimum consumption of chemical fertilizers improve yield and yield components. Manuscript profile

Open Access Article

2 - Evaluation of Different Levels of Nitrogen Fertilizer on Agronomic Traits of Corn (Zea mays L.) Genotypes
Marziyeh Izadian

Corn production management including nitrogen consumption will be different at different circumstances. In order to investigate the effect of different levels of nitrogen fertilizer on yield and yield components of seed corn hybrids in Khuzestan weather conditions, this More

Corn production management including nitrogen consumption will be different at different circumstances. In order to investigate the effect of different levels of nitrogen fertilizer on yield and yield components of seed corn hybrids in Khuzestan weather conditions, this research was carried out in the summer of 2013 in the lands of Safi Abad Agriculture and Natural Resources Research Center-Dezful (Seed Control and Certificate Unit) in Northern Khuzestan Province. The experiment was conducted as the split plot in the form of randomized complete block design with three replications. The main factor included two levels of seed corn hybrids (S.C. 704 and Karun) and the sub plot included four levels of nitrogen fertilizer consumption (200, 300, 400, and 500 kg.ha-1). The results showed that there was a significant difference between the hybrids just in terms of the number of seeds per row and biological yield. The difference between different levels of nitrogen consumption was significant in terms of seed yield, biological yield, 1000-seed weight, number of seeds per row, and harvest index. The interactive effects of treatments on the studied traits were not significant. According to the results of the research, consumption of 500 kg.ha-1 nitrogen and the use of S.C 704 hybrid is highly recommended to achieve maximum yield. Manuscript profile

Open Access Article

3 - Assessment Nutrient Absorption of Sugarcane (Saccharum Officinarum L.) Genotypes under Saline Situation
Mahsa Mansuri Mahmod Shomaeli

In order to study the effects of salinity levels of the irrigation water resulted from the sugarcane field drainage which contained mineral salt (NaCl), four salinity levels (0, 3, 6, 9 ds.m-1) and sugarcane genotypes (C4, C5,C3, CP48-103, C2, CP57-614, CP69-1062) in a More

In order to study the effects of salinity levels of the irrigation water resulted from the sugarcane field drainage which contained mineral salt (NaCl), four salinity levels (0, 3, 6, 9 ds.m-1) and sugarcane genotypes (C4, C5,C3, CP48-103, C2, CP57-614, CP69-1062) in a potted plant were examined. It was a factorial experiment in randomized complete block design with three replications which was carried out in research center of Amirkabir sugarcane industrial company located in 45 km south of Ahvaz in 2011. Results indicated that as the salinity stress increased, chlorophyll concentration relatively decreased in all genotypes, but the rate of decrease in CP69-1062, C4, C5 genotypes was less than other genotypes. Chlorine and sodium content in the leaves of genotypes tolerant of C4 and C5 decreased as the salinity increased which indicates the genetic ability of these genotypes in preventing the toxic ion of chlorine from entering the plant. CP69-1062 genotype in comparison to CP48-103 and CP57-614 genotypes has the lowest rate of sodium in leaves and owns genetic potential in preventing sodium ion from entering the plant. Manuscript profile

Open Access Article

4 - Response of Some Bread and Durum Wheat Genotypes to Different Levels of Nitrogen in South West of Iran
Atosa Enayat Shahram Lack Adel Modhej

In order to identify the effects of different levels of nitrogen fertilizer on seed yield andseed growth indices of some bread and durum wheat genotypes, a field experiment wasconducted in 2013-2014 in Khuzestan Agricultural and Natural Resource Research Center.The expe More

In order to identify the effects of different levels of nitrogen fertilizer on seed yield andseed growth indices of some bread and durum wheat genotypes, a field experiment wasconducted in 2013-2014 in Khuzestan Agricultural and Natural Resource Research Center.The experiment was designed as a split plot with three replications. Nitrogen applicationrates (50, 100 and 150 kg N.ha-1) were assigned in the main plots and the subplots consisted of six wheat genotypes (Bread; Verinak, Star, Chamran and Durum;Karkheh, D-84-5, D-83-8). Results indicated that seed yield, seed protein percentage,seed effective filling rate, remobilization of dry matter and the current photosynthesis,1000 seed weight and seed effective filling period between genotypes were significant.Maximum and minimum seed filling rate was related to Karkheh genotype in 150 kgN.ha-1, and Verinak in treatment of using 50 kg N.ha-1. The effect of nitrogen levels onseed effective filling period was not significant. The maximum duration of seed fillingwas devoted to Verinak genotype and the minimum one was for Karkheh genotype.Chamran genotype, by using 150 kg N.ha-1, had maximum seed yield while Verinakgenotype, using 50 kg N.ha-1 had minimum seed yield. Maximum 1000 seed weight wasdevoted to Karkheh genotype in treatment of using 150 kg N.ha-1, also the minimum1000 seed weight was that of Star genotype in treatment of using 100 kg N.ha-1. Themaximum seed protein percentage was observed at D-84-5 line, in 150 kg N.ha-1, andminimum amount of protein was in Chamran and Karkheh in 50 kg N.ha-1. A positiveand significant correlation observed between seed yield and seed weight, the currentphotosynthesis rate and remobilization rate. In general, according to Khuzestan climateconditions, planting Chamran genotypes by using 150 kg N.ha-1, can led to an appropriateyield and it is highly suggested. Manuscript profile

Open Access Article

5 - Yield and Nitrogen Fertilizer Efficiency Analyzes in Different Planting Dates of Canola (Brassica napus L.) under Warm and Dry Climate Condition
Abdolamir Rahnama Alireza Jafarnejadi Mohammad Khayat

Canola sensitivity to delayed sowing date should be managed in such a way that the observance of crop rotation with less reduced in seed yield. The research was conducted to evaluate the yield variation of Hyola401 hybrid, affected by sowing date and nitrogen fertilizer More

Canola sensitivity to delayed sowing date should be managed in such a way that the observance of crop rotation with less reduced in seed yield. The research was conducted to evaluate the yield variation of Hyola401 hybrid, affected by sowing date and nitrogen fertilizer treatments. In this study, the effect of planting date and different levels of nitrogen fertilizers on effective characteristics of canola yield were carried out by combined analysis split plot experiment based on randomized complete blocks design in two consecutive years with four replication. Main plot included different planting date (10-Nov, 20-Nov, 1-Dec, 10-Dec.) and four level of nitrogen fertilizers (0, 50, 100, 150, 200 kg.ha-1) belonged to sub plots. The results indicated that canola yield affected by planting date, is subject the linear relationship Y= 2693.0-36.05D (Y= yield and D=planting dates) so crop yield 3.1% decreased per each day delay in planting date. Canola yield in different level of nitrogen treatments was subjected non-liner relation Y=1360.5-0.17N2-0.00063N3 accordingly, most efficiency in the treatment of 100 and 150 kg of nitrogen fertilizer were found. Estimate yield affected by planting date and nitrogen fertilizer based on the relation Y= 1654-36.1D + 10.4N indicated per every day the sowing is delayed about 36.1 kg of seed yield reduction occurs, so to compensate mentioned reduction in the range of studied planting date about 10.4 kg of nitrogen fertilizer should be consumed. Determining the correlation coefficient between yield and its components by using interaction effect of sowing date and nitrogen fertilizer revealed that the number of pods per plants and seed weight had more correlation with the seed yield trait, which is indicated significant effect of the implemented treatments on these two components of yield. Manuscript profile

Open Access Article

6 - Effects of Different Rates of Selenium Fertilizer and Cow Manure on Selenium Uptake in Festuca arundinacea
Hadi Chamheidar Rozbeh Farhoudi

One of the crucial elements for livestock and human nutrition is selenium and its deficiency or toxicity can harm human and livestock health. The present study is designed with the aim of studying the effect of different levels of selenium fertilizer (Selcote-Ultra) and More

One of the crucial elements for livestock and human nutrition is selenium and its deficiency or toxicity can harm human and livestock health. The present study is designed with the aim of studying the effect of different levels of selenium fertilizer (Selcote-Ultra) and cow manure on the uptake of selenium in tall fescue. For this purpose, a pot experiment with complete randomized block design in the form of a factorial experiment was carried out on a single soil sample with the cultivation of Festuca arundinacea (Tall fescue), five levels of selenium fertilizer (0, 5, 10, 20 and 40 g.ha-1), and two levels of cow manure (Zero and 100 tons per hectare) with three replications during the 2014-2015. The result of means comparison showed that the uptake of selenium during three harvests was affected by different levels of selenium fertilizer and cow manure. With increasing selenium rates, selenium uptake in the plant aerial parts in all three harvests raised significantly (p<0.05). Selenium uptake for the cattle in all treatments except for the control treatment in all three harvests was in the optimal range, therefore the treatment of 5 g.ha-1 selenium could be used as a suitable treatment for providing cattle and human demands with selenium, because its application is more economical in comparison to treatments of 10, 20, and 40 g.ha-1. With increasing cow manure application, selenium uptake in tall fescue in all three harvests revealed a significant decrease (p<0.05) which is due to dilution effect and the organic material role in selenium absorption. Manuscript profile

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