In the context of this Bachelor Thesis twenty samples of hay from the German provinces
North Rhine-Westphalia (NRW) and Berlin-Brandenburg (BB), respectively, were collected
and analyzed regarding their content of the micronutrients calcium, phosphor, sodium,
potassium, magnesium as well as zinc, copper, iron, manganese and selenium.
The analysis as well as the organoleptic test revealed a number of differences between the
said two regions.
On average, the samples from NRW contained higher feed and hygienic values, which is due
to the time of harvest as in NRW hay is harvested earlier than in BB. The earlier the harvest,
the higher the percentage of sheets, which are the carriers of the main share of micronutrients.
In the course of the analyses of micronutrients, the samples of NRW consistently contained
larger amounts. The sole exception is copper.
The statistics only revealed significant differences between the regions regarding sodium,
potassium and selenium.
In the comparison between different growth levels during the first and the second harvests,
respectively, the study shows that the contents of micronutrients are generally higher in the
Furthermore the samples were divided according to their time of harvesting, to show the trend
during vegetation. It became apparent that the content of micronutrients has a decreasing
tendency, which strongly correlated with the main content of micronutrients in the sheets, as
in the late stadium of vegetation there are fewer sheets than at its beginning. The sole
exception was iron as its content has a rising tendency. Moreover, the comparison of both
states in terms of the vegetation showed partial differences.
With regard to manuring, only slight differences appeared. There are different ranges between
samples from manured grassed areas and not manured grassed areas in both regions.
In addition, the samples were tested as to whether they contained sufficient micronutrients to
meet the requirements of horses with basic needs as well as of lactating mares.
This comparison illustrated that generally the daily ration of hay is not able to fulfill the
horse’s need of micronutrients, and that feeding supplements is required.
The analysis of micronutrients in hay and the consequent juxtaposition of NRW and BB
revealed that, considering several factors, there are some differences between the two regions.
However, the differences do not have statistical significance concerning each item.