RESEARCHES CONCERNING THE PRODUCTIVITY OF SOME SANDY-LAND GRASSLAND FROM VALEA LUI MIHAI - BIHOR COUNTY PUBLISHEDŞtefania Anica Derşidan, Alexandru Moisuc None
Grasslands are an important resource of Valea lui Mihai (Bihor County) they representing more then 22 % form the total agricultural land of the locality. Most of the grasslands are used under their natural capacity, because most of the times the lack of the maintenance works and the overexploitation or under exploitation are determining the reduction of the biomass yield. Usually the grassland surfaces that are closer to the settlements are overexploited and those that are farther are underexploited. The topic of this work is the productivity of some sandy land grassland from Valea lui Mihai (Bihor County). The purpose of this research is to reach pieces of information about the productivity of the analysed grasslands. Another aspect taken in account in this work is the pastoral value of the grasslands and the carrying capacity of the surfaces that are used for grazing. The data were collected from 4 grassland surfaces (Lenfin – hayfield, Fürkó, Dihenes and Urkuta – pastures) during 2007-2008. The research methods used in this work are measurement of the yield with the direct method respectively the method of the repeated mowing, and the determining of the carrying capacity per hectare of the grassland surfaces used for grazing. The harvests were grouped in three cycles and from every of the grassland were collected samples of fresh fodder from six plots. The results obtained in this research show that the grassland vegetation from the studied area has a great stability from the point of view of yield, and carrying capacity. The differences consist in the yield distribution on harvests, these being influenced by the repartition of the rainfall during the vegetation period. The number of the animals that are using the grassland is greater then the carrying capacity of the pastures used, and the forage deficit must to be provided from forage crops cultivated in arable land.
sandy-land grassland; productivity; carrying capacity; pasture; harvests