News Update on Micronutrients Research: Nov – 2019

Micronutrients: oxidant/antioxidant status

Potentially damaging species (reactive O, N and element species) arise as by-products of metabolism and as physiological mediators and signalling molecules. Levels of those species ar controlled by the inhibitor weapons system. many elements of this method ar micronutrients (e.g. vitamins C and E) or ar dependent upon dietary micronutrients (e.g. CuZn and Mn superoxide dismutase). The inhibitor defences act as a coordinated system wherever deficiencies in one part might have an effect on the potency of the others. aerophilic stress is also a vital consider infection if micronutrients ar deficient. [1]

Micronutrients in pregnancy

Vitamins and minerals, stated put together as micronutrients, have vital influences on the health of pregnant girls and also the growing vertebrate. Iron deficiency leads to anemia which can increase the chance of death from hemorrhage throughout delivery, however its effects on vertebrate development and birth outcomes continues to be unclear. B complex deficiency will cause haematological consequences, physiological condition complications and nonheritable malformations, however once more the association with different birth outcomes is equivocal. deficiency disease has been associated in some, however not all studies with complications of physiological condition and delivery, yet like growth retardation, nonheritable abnormalities and stupid neurobehavioral and immunologic development within the vertebrate. Iodine deficiency throughout physiological condition leads to hypothyroidism and potential vertebrate wastage and preterm delivery. Deficiency of different minerals like metallic element, selenium, copper, and atomic number 20 have conjointly been related to complications of physiological condition, vaginal birth or vertebrate development. [2]

Micronutrients in Crop Production

The essential micronutrients for field crops area unit B, Cu, Fe, Mn, Mo, and Zn. different mineral nutrients at low concentrations thought-about essential to growth of some plants area unit metal and Co. The incidence of matter deficiencies in crops has augmented markedly in recent years thanks to intensive cropping, loss of high soil by erosion, losses of micronutrients through action, liming of acid soils, remittent proportions of yard manure compared to chemical fertilizers, augmented purity of chemical fertilizers, and use of marginal lands for crop production. matter deficiency issues also are aggravated by the high demand of recent crop cultivars. will increase in crop yields from application of micronutrients are rumored in several elements of the globe. Factors like hydrogen ion concentration, reaction potential, biological activity, SOM, cation-exchange capability, and clay contents area unit necessary in determinant the provision of micronutrients in soils. [3]

Micronutrients decline under long-term tillage and nitrogen fertilization

Tillage and N (N) fertilization are often expected to change matter dynamics within the soil and in plants over time. However, quantitative info relating to the results of tillage and N application rates on matter dynamics is proscribed. The objectives of this study were (a) to see the long impact of various tillage strategies further as variation in N application rates on the distribution of Mehlich III extractible Mn, copper, zinc, boron, and iron in soils and (b) to assess accumulation of a similar nutrients in wheat (Triticum aestivum L.) tissues. The system studied was beneath a dryland winter wheat-fallow (WW-F) rotation. Tillage strategies enclosed wedge (MP), disk (DP) and sweep (SW), and therefore the N application rates were zero, 45, 90, 135, and 180 kg ha−1. The concentration of soil Mn was bigger beneath refugee (131 mg kg−1) than under MP (111 mg kg−1). Inorganic N application reduced extractible soil copper whereas, it accumulated Mn accumulation in wheat grain over time. [4]

Distribution of Soil Micronutrients of Bakalori Irrigation Project, Zamfara State, Nigeria

The study was distributed to assess the distribution of soil micronutrients at Bakalori Irrigation Project, Zamfara State. 3 regime areas; Maradun (Upper slope), Talata Mafara (Middle slope) and Bakura (Lower slope) were purposively sampled on Sokoto stream. 3 profile pits were mammary gland, one in every regime of the study website, soil samples were collected from every horizon. Results showed that the soils were slightly acid to neutral with mean pH scale of vi.29, 6.60 and 6.62 for higher, middle and lower slope severally. Organic carbon was low with mean values of five.67 gkg-1, 2.79 gkg-1 and four.72 gkg-1. CEC values were medium with the mean of ten.76, 10.92 and 10.60 cmolkg-1. The results of obtainable micronutrients showed that Fe was low with the mean values of one.55 mgkg-1, 1.8 mgkg-1, and 1.83 mgkg-1, Mn was low to medium with the mean values of zero.70 mgkg-1, 0.85 mgkg-1  and one.08 mgkg-1, Zn was medium with the mean values of one.05 mgkg-1, 0.85-1 and 1.0 mgkg-1 and conductor was high with the mean values of two.30 mgkg-1, 1.5 mgkg-1 and a couple of.58 mgkg-1 all told the 3 sites (upper, middle and lower slope). [5]

Reference

[1] Evans, P. and Halliwell, B., 2001. Micronutrients: oxidant/antioxidant status. British journal of nutrition, 85(S2), (Web Link)

[2] Black, R.E., 2001. Micronutrients in pregnancy. British Journal of Nutrition, 85(S2), (Web Link)

[3] Fageria, N.K., Baligar, V.C. and Clark, R.B., 2002. Micronutrients in crop production. In Advances in Agronomy (Vol. 77, pp. 185-268). Academic Press. (Web Link)

[4] Micronutrients decline under long-term tillage and nitrogen fertilization
Santosh Shiwakoti, Valtcho D. Zheljazkov, Hero T. Gollany, Markus Kleber & Baoshan Xing
Scientific Reports volume 9, Article number: 12020 (2019) (Web Link)

[5] A. Dogo, A., U. Dikko, A., G. Ojanuga, A., S. Noma, S. and B. Sharu, M. (2017) “Distribution of Soil Micronutrients of Bakalori Irrigation Project, Zamfara State, Nigeria”, Asian Research Journal of Agriculture, 4(2), (Web Link)

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