جستجوی مقالات مرتبط با کلیدواژه "نیترات آمونیوم" در نشریات گروه "زراعت"

This study was conducted to investigate the effect of Potassium Thiosulfate and Nitrate fertilizers on yield, water use efficiency and control of tuber cracking of potato cultivars. This research was conducted Factorial based on randomized complete block design with three replications at the National Potato Research Station located in Ardabil during 2021. The first factor includes Potassium Thiosulfate at three levels (zero, 10 and 20 liters per hectare with irrigation water), the second factor contains Ammonium Nitrate at three levels (based on soil test, 30% and 60% more than soil test) and third factor included four potato cultivars (Agria, Savalan, Anusha and Takta). The results showed that there was a significant difference between the levels of Potassium Thiosulfate fertilizer, cultivars, interaction effect of Potassium Thiosulfate fertilizer and Nitrogen fertilizer and tripartite interaction of Potassium Thiosulfate fertilizer, Nitrogen fertilizer and cultivars in terms of tuber yield, tuber number and weight per plant, plant height, main stem number per plant, water use efficiency, mean of number, length, width, depth and surface of tuber cracking. The highest tuber yield, tuber weight per plant and water use efficiency in the treatment of Potassium Thiosulfate fertilizer 10 liters per hectare and Nitrogen 250 and 328 kg.ha-1 in Takta cultivar, Potassium Thiosulfate fertilizer 10 liters per hectare and Nitrogen fertilizer 400 kg.ha-1 in Savalan cultivar and 20 liters per hectare of Potassium Thiosulfate fertilizer and 328 kg.ha-1 of nitrogen were observed in Savalan cultivar. Based on the results of factor analysis, in the treatment of zero liters per hectare of Potassium Thiosulfate fertilizer and 328 kg.ha-1 of Nitrogen fertilizer of Takta and Savalan cultivars; in the treatment of 10 liters per hectare of Potassium Thiosulfate fertilizer and 250 kg.ha-1of Nitrogen fertilizer in Takta and Agria cultivars, 328 kg.ha-1of Nitrogen fertilizer in Takta cultivar and 400 kg.ha-1 Nitrogen fertilizer in Anusha, Takta and Savalan cultivars and 20 Potassium Thiosulfate fertilizer per hectare and 250 kg.ha-1 Nitrogen fertilizer in Takta cultivar and 328 kg.ha-1 Nitrogen fertilizer in Savalan cultivar had the highest values in terms of tuber yield, tuber number and weight per plant, plant height and water use efficiency. Based on the results of cluster analysis, the fourth group includes treatments of 10 liters per hectare of Potassium Thiosulfate fertilizer and 250 and 328 kg.ha-1 of Nitrogen fertilizer in Takta cultivar and 400 kg.ha-1 of Nitrogen fertilizer in Savalan cultivar and 20 liters per hectare of Potassium Thiosulfate fertilizer in 328 kg.ha-1 of Nitrogen fertilizer in cultivar was in Savalan cultivar and in terms of tuber yield, tuber number and weight per plant, plant height, water use efficiency had the highest amount and without the number of tubers with crack in the plant.

Nitrogen is the most important nutritional element required by the rice plant, and a large part of it is lost in paddy fields through leaching, which can lead to environmental problems and reduce the efficiency of urea fertilizer use in rice cultivation. Therefore, the present experiment was conducted with the aim of investigating the effect of using different organic and chemical nitrogen fertilizers in order to reduce or solve this problem in 2021, in a split plot experiment based on a randomized complete blocks design with three replications was implemented.The main factor including humic acid, fulvic acid and application of nitrogen fertilizer (granular urea, sulfur coated urea, ammonium sulfate, urea and ammonium nitrate, combination of sulfur coated urea and granular urea, and control) were considered as secondary factors. Comparison of the average of simple effects showed that the highest yield of paddy was obtained with the application of humic acid, which increased by 19% compared to the control. The highest plant height and biological yield were obtained by applying sulfur coated urea or sulfur coated urea with granulated urea. The highest dry weight of the cluster per plant, a single plant dry weight and the number of fertile tillers in plant belonged to the application of sulfur coated urea or the co-application of sulfur coated urea with granular urea with humic acid application. Therefore the fertigation of humic acid can be useful in improving the growth of rice in rice-cultivated soils in Khuzestan.

In order to investigate the effect of different sources of organic fertilizers and nitrogen on some of the physiological, quantitive and qualitive characteristics under direct cultivation, a field experiment in the crop season 2020-2021, in a split plot experiment based on a randomized complete block design with three replications were implemented in Ahvaz. the main factor at three levels (humic acid, fulvic acid and control) and the use of nitrogen fertilizer at 6 levels (granulated urea fertilizer, sulfur coated urea, ammonium sulfate fertilizer, urea and ammonium nitrate, sulfur coated urea and granulated urea fertilizer and no application of nitrogen fertilizer as a control) were a secondary factor. Mean comparison of simple effects showed that the highest percentage of total protein of leaf, rice yield, hectoliter weight, rice grain length, white grain width after cooking and the lowest percentage of grain crushing after bleaching were observed by humic acid application. The increase in rice yield, rice grain length and white grain width after cooking in humic acid application treatment compared to the control was 19.4, 5.4 and 5.6 percentage respectively. The highest percentage of total protein of leaf, rice grain length, white grain width after cooking and the lowest percentage of grain crushing after bleaching were obtained by applying sulfur coated urea or sulfur coated urea with granular urea. The mean comparison of interaction effect of the factors on other studied traits showed that the highest leaf area index was observed with the application of sulfur coated urea or the application of sulfur coated urea with granular urea × application of fulvic acid and the highest amount of chlorophyll a, b, carotenoids and white grain length after cooking belonged to the treatment of application of sulfur coated urea along with granular urea × application of humic acid. It seems that the supply and availability of nitrogen in the soil at different growth stages of rice under the application of nitrogen fertilizer treatments and the improvement of soil characteristics due to the use of organic fertilizers and as a result of sufficient access to nutrients at different stages of plant growth and development, improvement of physiological characteristics, has affected the quantity and quality of rice. Based on the results of this experiment, it seems that the combined application of humic acid or fulvic acid with sulfur coated urea fertilizer or sulfur coated urea with granulated urea is recommended in similar conditions.

Nitrate (NO3-) and ammonium ion (NH4) in the soil differ for their effects on yield quantity and quality of tobacco. Climatic and edaphic factors and agronomic management can undermine their differences. With the increase in leaf yield, chlorine and nicotine content of the leaves and on the contrary, by reducing potassium content, nitrogen, has the opposite effect on the quantity and quality of tobacco leaves. Tobacco farms do not consume urea fertilizer in the country and farmers believe that the use of urea result to the late tobacco and tobacco leaf color is inappropriate technology.
Material and Two field experiments were conducted in Oromieh and Titrtash in 2014 to study the interactive effects of nitrogen resources) urea (ammonium) and nitrate ammonium fertilizers (and application pattern on yield quantity and quality of tobacco. The treatments were factorial arrangement of nitrogen resources and application patterns of basal, 2/3 basal and 1/3 after initiation of rapid growth (AIRG, about three days after transplanting), 1/2 basal and 1/2 AIRG, 1/3 basal and 2/3 AIRG) with 3 replications based on randomized complete block design. Dry leaf yield, gross revenue, average price of tobacco, chlorophyll, nicotine, sugar, ash, chlorine, potassium, plant height and leaf area index were measured. Analysis of variance was performed using SPSS software.
Finding: The results indicated that the leaf yield was higher in Tirtash than Oromieh. In terms of leaf yield, the best application pattern for urea and nitrate ammonium was 2/3 basal and 1/3 AIRG, and 1/3 basal and 2/3 AIRG, respectively. Regarding potassium content of cured leaf, urea was better than nitrate ammonium for Tirtash. But for Oromieh, it was vice versa. Nicotine content was only affected by application pattern; the 1/2 basal and 1/2 AIRG was the best for nicotine content. Ammonium nitrate caused lower accumulation of chloride in leaf than urea. Generally, although urea and nitrate ammonium did not differ for leaf yield, but they can enhance leaf quality (potassium content) in Tirtash and Oromieh, respectively.
As a conclusion it can be said that the effect of nitrogen source on leaf yield was not significant. In other words, no difference between urea and ammonium nitrate in terms of leaf yield.The results dispel the ambiguities use of urea fertilizer in the tobacco field and given the relative abundance of urea relative to ammonium nitrate fertilizer domestic production of these fertilizers, the problems facing tobacco farmers in different regions in the preparation of ammonium nitrate fertilizer eliminated.

In order to investigate the effects of nitrogen fertilizer type and split application of fertilizers، an experiment was conducted in experimental field of Lorestan University as split plot experiment based on complete randomized block design with four replications. In this experiment seven nitrogen treatments were in the main plots and two corn hybrids (short season and full season) were in the subplots. The Results showed that by increasing the amount of both nitrogen fertilizers grain yield and biological yield of corn hybrids increased. Using urea in comparison with ammonium nitrate has higher effects on grain yield of corn hybrids. For both of corn hybrids and especially for full season hybrid split application of nitrogen fertilizers have positive effects on grain yield. Based on results split application of urea has higher positive effects on grain yields of corn hybrids.

An outdoor pot-experiment was conducted to evaluate the effect of various fertilizers on reduction Phelipanche aegyptiaca damage in tomato at Research Farm of University of Tehran, Karaj, during 2008 and 2009. Experimental design was a randomized complete block with four replications. Treatments comprised ammonium nitrate, ammonium phosphate and urea each at rates of 150 and 300 kg/ha and ammonium sulfate at 250 and 500 kg/ha. In this research control pot for the first year was sowing Phelipanche aegyptiaca seed and in the second year, control without Phelipanche aegyptiaca seed also was included. Results in the first year showed that Ammonium sulfate applied at 250 and 500 kg/ha and control without broomrape was the most effective treatments in increasing tomato yield and reducing broomrape damage. Ammonium phosphate and urea both at 150 kg/ha and ammonium sulfate at 250 kg/ha had most tomato dry weight while the minimum was belonged to ammonium nitrate used at 150 and 300 kg/ha. Ammonium phosphate applied at rates of 150 and 300 kg/ha decreased aerial and tuber dry weight of broomrape more than other treatments. According to these results applying ammonium sulfate at 250 kg/ha for broomrape control in tomato is the best treatment