Influence of Urea and Ammonium Sulfate on Soil Acidity Indices in Lowland Rice Production

Fageria, N. K.; Santos, A. B. dos; Moraes, Milton Ferreira de

doi:10.1080/00103624.2010.485237

Cited by 88 publications

(53 citation statements)

References 20 publications

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“…In other studies, Fageria et al (2010) and Ferrari et al (2015) also found the soil pH to decrease with increasing doses of AS fertilizer rates. Ammonium sulphate is an acidic reaction fertilizer and it is stated that it will increase the microflora and Soxidizing bacteria in the soil as a sulphur containing fertilizer, thus accelerating the pH decrease (Lluch and Olivares, 1979;Müftüoğlu and Sarımehmet, 1993).…”

Section: Discussionmentioning

confidence: 96%

Phosphorus release dynamics under phosphate rock and ammonium sulphate in soil amendment

Agyarko¹,

Frimpong²,

Abunyewa³

2017

Eurasian Journal of Soil Science (Ejss)

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Article Info Received : 05.01.2017 Accepted : 07.04.2017 This study was undertaken to assess the release pattern of available phosphorus in a Togo phosphate rock and ammonium sulphate soil amendment. Treatments were prepared through the combinations of soil, phosphate rock (PR) and ammonium sulphate (AS) fertilizer. The treatments were; Control, 12.5g PR, 25g PR, 12.5g PR+1g AS, 12.5g PR+2g AS, 25.0g PR+1g AS and 25.0g PR+2g AS kg -1 soil. Standard laboratory methods were used to assess pH, available phosphorus (P) and total phosphorus (P). Generally, the pH of treatments decreased to the lowest levels between the 4 th and 6 th weeks after amendment. The AS fertilizer treatments had significantly (p≤0.05) lower pH values than those without. Amendments with the 2gAS kg -1 soil had significantly (p≤0.05) lower mean pH values than those with the 1gAS kg -1 soil. The AS fertilizer treatments also had significantly (p ≤ 0.05) higher levels of the available P than those without. The higher the amount of the AS in the amendment, the higher the level of the available P concentration. Increase in the level of AS in the amendment also increased the mean value of the available P released. The peaks of available P released were observed between the 6 th and the 8 th weeks, after the lowest pH values had been attained. Decreased soil pH relatively increased the amount of phosphorus released (y = -12.47x + 111.4; R 2 =0.53). Addition of PR in the treatments increased the total P levels. In conclusion, combined application of AS and PR has the potential to increase soil P availability, which is beneficial to crop farmers.

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Section: Discussionmentioning

confidence: 96%

Phosphorus release dynamics under phosphate rock and ammonium sulphate in soil amendment

Agyarko¹,

Frimpong²,

Abunyewa³

2017

Eurasian Journal of Soil Science (Ejss)

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“…However, long-term excessive application of fertilizers has been shown to have a negative effect on the soil and on the quality of cereal crop. Several studies have shown that over-fertilization can lead to soil acidification [15,106]. Furthermore, nitrogen leaching and ammonia volatilization also contribute to environmental issues in areas where urea and nitrogen-fertilizers are applied.…”

Section: Irrigation and Fertilizer Efficiencymentioning

confidence: 99%

Effect of Climate Change on the Yield of Cereal Crops: A Review

Jin

Vanga

Saxena

et al. 2018

Climate

191

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By the end of this century, the average global temperature is predicted to rise due to the increasing release of greenhouse gases (GHGs) into the atmosphere. This change in climate can reduce agricultural yields, resulting in food insecurity. However, agricultural activities are one of the major contributors of GHGs and lower yields can trigger increased activity to meet the demand for food, resulting in higher quantities of GHGs released into the atmosphere. In this paper, we discuss the growth requirements and greenhouse gas release potential of staple cereal crops and assess the impact of climate change on their yields. Potential solutions for minimizing the influence of climate change on crop productivity are discussed. These include breeding to obtain cereals that are more tolerant to conditions caused by climate change, increased production of these new cultivars, improved irrigation, and more effective use of fertilizers. Furthermore, different predictive models inferred that climate change would reduce production of major cereal crops, except for millets due to their ability to grow in variable climatic conditions, and in dry areas due to a strong root system. Moreover, millets are not resource-intensive crops and release fewer greenhouse gases compared to other cereals. Therefore, in addition to addressing food security, millets have an enormous potential use for reducing the impact of agriculture on global warming and should be grown on a global scale as an alternative to major cereals and grains.

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“…Positive effect of A. sulfate (containing 24% sulfur) on yield may be explained by the fact that A. sulfate as Nform decrease soil pH, which might favor elements availability and uptake by plants in slightly alkaline soils (Guelser, 2005;Fageria et al, 2010). Regarding to low fresh matter produced using urea as N-source, this is partly because of urea toxicity and low uptake rates of N (Marschner, 1995).…”

Section: Discussionmentioning

confidence: 99%

Reduction of Nitrate Content in Response to Salicylic Acid in Spinach and Parsley Fertilized with Two Different N-Sources

Elwan

El-hamahmy

2015

HJSC

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Spinach and parsley are hyper-nitrate accumulator vegetables, thereby constituting a possible human health risk. For that, pot and two field experiments were conducted to investigate the effect of exogenous salicylic acid (SA) application on yield, nitrate content and another quality parameters in spinach and parsley using two different ammonium fertilizers as ammonium sulfate (A. sulfate) and urea. The results of pot experiment (factorial, 2 x 2) showed that, A. sulfate-fertilized plants produced maximum yield compared to urea-fertilized ones, which companied with high level of nitrate content (up to 942.6 and 604.5 mg Kg -1 FW in spinach and parsley, respectively). Application of 5 µM of SA reduced nitrate content by about 18 and 10 % in A. sulfate-fertilized plants and by 50 and 7 % in ureafertilized plants, in both spinach and parsley, respectively. Under field conditions, using only urea fertilizer, nitrate was decreased to minimum levels, 679.0 and 395.6 mg kg -1 FW, in spinach and parsley, sprayed with 20 and 5 µM-SA, respectively. This reduction was associated with induction of nitrate reductase (NRase) activity. The maximum percentage of NRase activity over control (74%) was recorded in spinach treated with 20 µM of SA and reached to 60 % in parsley treated with 5 µM-SA. Also, spraying of SA increased marketable yield, vitamin C and total free amino acids contents in both tested leafy vegetables. It was concluded that, SA application preserved nitrate content in safe limit for human consumption.

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Influence of Urea and Ammonium Sulfate on Soil Acidity Indices in Lowland Rice Production

Cited by 88 publications

References 20 publications

Phosphorus release dynamics under phosphate rock and ammonium sulphate in soil amendment

Phosphorus release dynamics under phosphate rock and ammonium sulphate in soil amendment

Effect of Climate Change on the Yield of Cereal Crops: A Review

Reduction of Nitrate Content in Response to Salicylic Acid in Spinach and Parsley Fertilized with Two Different N-Sources

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