Cattle hypomagnesemia has been typically a pasture disease and labeled “grass tetany”, but after its increase during indoor periods only single label “hypomagnesemia” has been used after 1983. Cropland and groundwater (gw) Mg/Ca ratio in Finnish Rural Centers (RC) . Northern RC’s are MK11, MK16, 17, 18 and 19 are labeled with gray color. Agricultural soil Mg/Ca is higher in North than in In Other parts of Finland (with and without exclusion of Åland), but not in groundwater. Numbers of Finnish Provinces are from . Data on veterinary monthly reports by provinces are only partially available , concerning December 1979, December 1981, December 1985, December 1989, December 1991, December 1992, December 1993, Year 1994, Year 1995 and Year 1996. Provinces are in order of the Rural Centers labeled by the numbers of : given by abbreviations since 1991: 01 Uudenmaan - UL, 02 Turun ja Porin - T-PL, 03 Ahvenanmaa – ÅL (Åland), 04 Hämeen - HL, 05 Kymen - KYL, 06 Mikkelin - ML, 08 Kuopion - KUL, 07 Pohjois-Karjalan – P-KL, 09 Keski-Suomen – K-SL, 10 Vaasan - VL, 11 Oulun - OL, 12 Lapin – LL. About 1/3 of MK16 Central Ostrobothnia in belonging to ”Vaasan” , but here “Vaasan” has been treated as a pure part of South Finland (Figures 1 & 2) (Tables 1 & 2).
Increase of Hypo-Mg/Puerperal tetany ratio after 1993 shows
that hypomagnesemia is still more common during pasture period.
It can even depend on several other factors: e.g. variation of weather,
temperature and grass digestibility (incl sugars) (Tables 3 & 4).
In closer analysis is seen one discrepancy: HMg associates in 1979, 1981 & 1983 (slightly) positively with (Mg/Ca).soil, even by using linearly interpolated (Mg/Ca) ratios (calculated by values from 1976-80 (.78) and 1986- 80 (.88). This needs a new assessment. Data on period 1979- 83 should be opened.
Phosphor and obvious association of hyperirritative syndromon with HMg seems to need a closer assessment, too.
Ratio of cattle hypomagnesemia cases per cases of puerperal paresis in monthly reports of veterinary surgeons were constantly lower in North Finland than in other parts of Finland, where Mg/Ca ratio of soil was lower (1965-85), but groundwater Mg/Ca higher. This suggests on higher importance of cropland than gw Mg/Ca ratio in livestock and human nutrition.
- Regional Groundwater Si and Mg/Ca, Soil Mg/Ca, Soil-Types, Cardiac Diseases and Local Long-Term Dolomite Application - Soil Values from Two Periods Suggest on Different Roles of Mg and Si in Cardiac Epidemiology. Biomed J Sci & Tech Res 26(5): 20363.
- Statistical Yearbook of Finland 1980. Tilastokeskus(1981) Helsinki(map of Finnish provinces down left on the page XXX).
- I-XI. Incidence of some animal diseases according monthly veterinary reports. (“EräideneläintautienesiintyminenSuomessaeläinlääkäreidenkuukausi-ilmoitustenmukaan”) [In Finnish].
- Toysa T, OsmoHanninen (2016) Soil Weathering, Silicon and CHD in Finland. J J Agriculture2(1): 008.