Nitrogen Management for Sustainable Soil Organic Carbon Increase in Inceptisols Under Wheat Cultivation

Sarma, Banashree; Gogoi, Nirmali

doi:10.1080/00103624.2017.1373785

Cited by 6 publications

(2 citation statements)

References 25 publications

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“…Within fertilizer levels, there was a significant difference in DM between the microalgae‐treated plants and the mineral‐fertilized plants (Figure 2A). With increasing N fertilization (fertilizer level), higher DM was observed, which can be attributed to photosynthetic performance, where N acts as an important component of chlorophyll (Sarma & Gogoi, 2017).…”

Section: Discussionmentioning

confidence: 99%

Nitrogen use efficiency of microalgae application in wheat compared to mineral fertilizer

Mückschel,

Ollo,

Glaeser

et al. 2023

J. Plant Nutr. Soil Sci.

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BackgroundWastewater from sewage treatment plants contains high levels of nutrients, which can be used for plant nutrition. Classical wastewater treatment plants use complex microbial consortia of autotrophic and heterotrophic microorganisms for biological wastewater treatment. Certain autotrophic microalgae (e.g., species of the genera Chlorella, Scenedesmus, and Pediastrum) accumulate nutrients from wastewater very effectively.AimsWe investigated the potential of microalgae biomass obtained from a prototype wastewater treatment plant as a source of nutrients for crops, focusing on nitrogen.MethodsWe provided wheat plants with different levels of algae biomass equivalent to 60, 120, and 180 kg N per hectare or with mineral fertilizer (N, P, and K) equivalent to the amounts contained in the algal biomass. Physiological and phenotypic traits were measured during growth, including vegetation indices, photosynthetic performance, growth, and nitrogen use efficiency (NUE). In addition, the adundances of Bacteria, Archaea and fungi and genes of ammonium oxidizing Bacteria and Archaea were determined in the rhizosphere of differently fertilized plants.ResultsMicroalgal application at fertilizer levels of 120 and 180 kg N ha–1 showed significantly improved physiological performance, growth, yield and nutrient uptake compared to the unfertilized control. Nevertheless, their yields and NUE were lower than with the application of equal amounts of mineral fertilization, while the adundance of rhizosphere microbes and ammonia‐oxidizing microorganisms were not significantly affected.ConclusionsMicroalgae from wastewater treatments form a suitable source of organic fertilizer for wheat plants with only moderate reductions in N use efficiency compared to mineral fertilizer.

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Section: Discussionmentioning

confidence: 99%

Nitrogen use efficiency of microalgae application in wheat compared to mineral fertilizer

Mückschel,

Ollo,

Glaeser

et al. 2023

J. Plant Nutr. Soil Sci.

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“…The rapid transition from 11 to 6 under the spontaneous plants' cover further supports the high rate of SOM mineralization under these conditions. Evidence indicates that for SOC build-up, nitrogen must be provided to the soil system, either through N-fixing organisms or by N-fertilizers [60][61][62][63], and that the absence of nitrogen supply to the soil eventually leads to SOC loss and land degradation [64,65]. Therefore, the absence of any nitrogen supply to the inter-row soil under both herbaceous covers can explain why these consistently exhibited the same SOC as the bare soil.…”

Section: Soil Organic Carbonmentioning

confidence: 99%

Spontaneous Plants Improve the Inter-Row Soil Fertility in a Citrus Orchard but Nitrogen Lacks to Boost Organic Carbon

Visconti

Peiró

Baixauli³

et al. 2022

Environments

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The inter-row soils in conventionally run citrus orchards in Eastern Spain lose fertility, either physically, chemically, or biologically, as a consequence of machinery traffic and the use of herbicides. In order to regain inter-row soil fertility, two grass-cover management alternatives to the commonly used herbicide-kept bare management, namely, spontaneous plants and fescue, were established and left for four years until their effects on several physical, chemical, and biological parameters were monitored for two years more. The fescue ground cover exhibited lower average and maximum soil temperatures due to higher evapotranspiration rates but also higher annual soil water content on average and, additionally, higher rhizodeposition. Despite the fact that these new beneficial conditions helped enhance the soil’s biological fertility under fescue, the physical or chemical fertilities did not improve and neither did the organic carbon (SOC). The spontaneous plants also enhanced the biological fertility, but in this case, beneficial conditions were reflected by improvements in the chemical fertility, particularly the exchangeable potassium, and in the physical fertility by increasing the surface hydraulic conductivity and decreasing the bulk density. In the inter-rows of this citrus orchard, a seeded grass cover does not seem able to provide any soil fertility enhancement in comparison to a spontaneous one; rather the opposite. However, a lack of natural or man-driven nitrogen inputs poses a constraint to SOC gains. For this aim, the annual surface application of organic nitrogen-rich materials or even better, the fostering of N-fixing organisms would be recommended.

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Potential use of bioenergy power plant residue biochar in mitigating N2O emission from acidic sandy loam soils: a comparative study

Chetia

Gogoi

Baruah

et al. 2021

Environmental Sustainability

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Nitrogen Management for Sustainable Soil Organic Carbon Increase in Inceptisols Under Wheat Cultivation

Cited by 6 publications

References 25 publications

Nitrogen use efficiency of microalgae application in wheat compared to mineral fertilizer

Nitrogen use efficiency of microalgae application in wheat compared to mineral fertilizer

Spontaneous Plants Improve the Inter-Row Soil Fertility in a Citrus Orchard but Nitrogen Lacks to Boost Organic Carbon

Potential use of bioenergy power plant residue biochar in mitigating N2O emission from acidic sandy loam soils: a comparative study

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