Mycorrhizae: Endomycorrhizae

Böhm, Josef; Hock, Bertold

doi:10.1007/978-3-642-60458-4_24

Cited by 2 publications

(2 citation statements)

References 178 publications

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“…more complicated geometries as (i) the 'constrictions' studied experimentally by Garcia el al., [33], or (ii) quasione-dimensional problems, where the potentials are constant within a layer, but random from one layer to the next. The last-mentioned problem has already been extensively studied by J. Mathon, [17], and in two-dimensional systems by one of the present authors, [42]. Also the recent work of Sanvito et al should be mentioned in this broader context.…”

Section: Discussionmentioning

confidence: 56%

Systematic two-band model calculations of the GMR effect with metallic and non-metallic spacers and with impurities

Gebele

Böhm

Krey

et al. 2000

Journal of Magnetism and Magnetic Materials

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By a semi-empirical Green's function method we calculate conductances and the corresponding Giant Magneto-Resistance effects (GMR) of two metallic ferromagnetic films separated by different spacers, metallic and non-metallic ones, in a simplified model on a sc lattice, in CPP and CIP geometries (i.e. current perpendicular or parallel to the planes), without impurities, or with interface-or bulk impurities. The electronic structure of the systems is approximated by two hybridized orbitals per atom, to mimic s-bands and d-bands and their hybridization.We show that such calculations usually give rough estimates only, but of the correct order of magnitude; in particular, the predictions on the impurity effects depend strongly on the model parameters. One of our main results is the prediction of huge CPP-GMR effects for non-metallic spacers in the ballistic limit.

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Section: Discussionmentioning

confidence: 56%

Systematic two-band model calculations of the GMR effect with metallic and non-metallic spacers and with impurities

Gebele

Böhm

Krey

et al. 2000

Journal of Magnetism and Magnetic Materials

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“…Similarly, Islami et al, (2011) reported that the application of chemical fertilizers in monoculture cassava was inadequate to maintain sustained yields; but combining farm yield manure (FYM) with chemical fertilizers increased soil fertility and cassava production. Arbuscular Mycorrhizal Fungi (AMF) also referred to as Vesicular Arbuscular Mycorrhiza (VAM) are widespread in terrestrial ecosystems and form mutually beneficial associations with nearly 80% of higher plants Smith et al 10 They are characterized by their intercellular and intracellular growth forms in plant roots, which are referred to as vesicles and arbuscules Böhm et al 11 Mycorrhizal symbioses are known to mitigate the problem of efficient uptake of immobile nutrients by plants Bolan; 12 Smith et al 13 Previous studies have shown that AMF are associated with salt Carretero et al 14 And drought tolerance Qiangsheng et al; 15 Ruiz-Lozano et al 16 and cassava is known to thrive under these conditions. The potentials of AMF in sustainable crop production have been demonstrated by many scholars Li et al 17 Céli et al, 2016; Tchabi et al 18 However its applicability has not been fully addressed.…”

Section: Introductionmentioning

confidence: 99%

Arbuscular Mycorrhiza Fungi, NPK (15-15-15) and Cow Dung Interaction in Sustainable Cassava Production and Food Security

KS¹

2017

APAR

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Increasing human population coupled with the depletion and degradation of soil resources constitutes a threat to food security in sub-Saharan Africa. Sequel to this, the growth, performance and yield of cassava (Manihot esculenta L.) were assessed using pure culture of arbuscular mycorrhiza fungus-Glomus deserticola, NPK (15:15:15) and Cow dung singly and in combination with each other at four treatment levels under field conditions. Control experiment was also set up without any treatment. The experiment was factorial, in completely randomized block design and replicated four times. Cassava stem cuttings, 18 cm length were planted in well tilled soil at a distance of 1 m apart and allowed to grow for six months. During the study; plant height, stem girth, leaf area, leaf chlorophyll content and yield were assessed. At harvest, fresh and dry tuber weights were measured. Data collected were subjected to one way analysis of variance and means separated using Tukey's HSD test (p≤0.05). The study showed that Glomus deserticola in combination with NPK produced cassava plants with significant differences (p<0.05) in height, stem girth, leaf area, chlorophyll content and yield. Arbuscular mycorrhiza fungus enhanced nutrient uptake of cassava plants. The balanced fertilization and amendment of the experimental soil with adequate nutrients supply provided useful agronomic information on the performance and yield of cassava. Summary: Although some sub-Saharan African countries have for a number of year's experienced significant agricultural success, demographic growth associated with high rates of erosion and land degradation continue to have an impact on food security in this part of the world. In this study, the growth and production of cassava (Manihot esculenta L.) was assessed by the contribution of pure culture of a mycorrhizal to arbuscules (Glomus deserticola), mineral fertilizers (NPK 15-15-15), cow manure and their combinations. The test was carried out on plots of 1 m × 1 m. On each plot, a cut of nearly 18 cm length was buried in the previously plowed soil. The experimental method consisted of a complete random block with a factorial plan of four repetitions. An equivalent number of control plots have not been processed. Vegetative growth parameters, including height of the plant, circumference of the stem and leaf surface were followed for six months, then the chlorophyll content of the leaves and yield were determined. These data were subjected to a simple variance analysis and a Tukey HSD test was performed to determine the significant differences between averages (p≤0.05). The use of Glomus deserticola in combination with NPK 15-15-15 mineral fertilizers has resulted in significant vegetative growth and yield significantly higher than other treatments. This suggests that this fungus improves the absorption of nutrients in cassava.

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Mycorrhizae: Endomycorrhizae

Cited by 2 publications

References 178 publications

Systematic two-band model calculations of the GMR effect with metallic and non-metallic spacers and with impurities

Systematic two-band model calculations of the GMR effect with metallic and non-metallic spacers and with impurities

Arbuscular Mycorrhiza Fungi, NPK (15-15-15) and Cow Dung Interaction in Sustainable Cassava Production and Food Security

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