A comparison of different15N application techniques to study the N net rhizodeposition in the plant-soil system

Merbach, W.; Schulze, Joachim; Richert, Maja; Rrocco, Evan; Mengel, K.

doi:10.1002/1522-2624(200008)163:4<375::aid-jpln375>3.0.co;2-w

Cited by 25 publications

(3 citation statements)

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“…In addition to this, we observed the effects of the specific cowpea cultivar on the soil properties, soil enzyme activities and crop yield and quality. This is not surprising, as previous reports have observed that the release of root exudates is controlled by the plant genotype [50,51]; thus, the plant genotype could have different effects on the soil properties and soil enzyme activities. On the other hand, this effect would be even larger if cowpea residues were used as green manure, increasing the nutrients' availability through mineralization of its residues [52][53][54].…”

Section: Discussionsupporting

confidence: 70%

Cowpea Crop Response to Mineral and Organic Fertilization in SE Spain

et al. 2021

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Mineral fertilization is considered to be useful for improving soil fertility and yields. However, its use is linked to global warming and soil and water pollution by its rapid mobilization. On the other hand, organic fertilization is recommended to maintain or improve soil organic carbon and total nitrogen stocks while contributing to climate change mitigation. The main goal of this study was to assess the effect of two different fertilizer types, mineral and organic, during three cowpea crop cycles on the soil’s physicochemical properties, enzyme activities, crop yield, crop quality and nutritional composition when considering two cowpea cultivars (Feijão frade de fio preto (FP) and Feijão frade de fio claro (FC)). The use of mineral fertilizers was seen to contribute to improved soil fertility due to the increase in soil properties, such as recalcitrant carbon, total nitrogen, ammonium content, available K and available Mg. On the other hand, organic fertilizers only increased the nitrate content in the soil. There were no differences in terms of cowpea crop yield, quality and nutritional composition by fertilizer type. Thus, both fertilizer types contributed to the same crop yield and quality, and thus the use of organic fertilizers can result in a sustainable alternative for maintaining cowpea crop yield and quality.

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Section: Discussionsupporting

confidence: 70%

Cowpea Crop Response to Mineral and Organic Fertilization in SE Spain

et al. 2021

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“…However, other studies have demonstrated that the exuding of compounds containing N is very low, and the exuded compounds are rich in sugars (Deubel et al, 2000;Paterson, 2003;Merbach et al, 2003). The main factors affecting the amount and composition of material exuded from the roots are vegetable species, plant development stage, environmental stress, nutritional state, injuries, application of chemical products and activity and composition of the soil microbial community (Marschner, 1995;Holland et al, 1996).…”

Section: N Exuding Through the Rootsmentioning

confidence: 99%

Herbicides and the Environment

Zimdahl,

Basinger

2024

Fundamentals of Weed Science

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“…Labelling techniques are the most effective and suitable approaches to quantify C and N rhizodeposition (Fustec et al, 2010; Kuzyakov & Schneckenberger, 2004; Merbach et al, 2000; Wichern et al, 2008). Different studies have quantified C and N rhizodeposition under controlled or field conditions by using 14 C, 13 C and 15 N isotopes (Domanski et al, 2001; Hupe et al, 2019; Jensen, 1993; Rasmussen et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Rhizodeposition through root senescence and root exudation of atmospheric C and N by legumes is controlled by traits indicative of resource acquisition and root development

et al. 2023

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Legume crop production has many benefits for agricultural systems. Through the rhizodeposition process, they release a significant amount of C and N into the soil, increasing soil organic C and reducing the use of N fertilizer. Rhizodeposition is known as a dynamic process influenced by many factors. The aim of this study was to study the contribution of root exudation and root senescence to the rhizodeposition of atmospheric C and N during vegetative and reproductive growth in annual and perennial legumes and to understand how this is linked to the fixation capacities of C and N and root functional traits. An original approach that combined 13CO2 labelling and the 15N dilution method was developed to measure the rhizodeposition of atmospheric C and N throughout plant growth by two annual grain legumes (pea and faba bean) and two perennial forage legumes (white and crimson clovers). C rhizodeposition was found to increase proportionally with N rhizodeposition during reproductive development and the differences observed between species were related to the C and N fixation abilities. The use of root traits such as specific root length, root tissue density and root dry matter content suggests a strong contribution of root exudation to C rhizodeposition at vegetative growth and a strong contribution of root senescence to both C and N rhizodeposition during reproductive growth. Synthesis. Both C and N rhizodeposition appeared to be controlled by traits indicative of resource acquisition and root development.

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A comparison of different15N application techniques to study the N net rhizodeposition in the plant-soil system

Cited by 25 publications

References 0 publications

Cowpea Crop Response to Mineral and Organic Fertilization in SE Spain

Cowpea Crop Response to Mineral and Organic Fertilization in SE Spain

Herbicides and the Environment

Rhizodeposition through root senescence and root exudation of atmospheric C and N by legumes is controlled by traits indicative of resource acquisition and root development

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