Published in Scientific Papers. Series A. Agronomy, Vol. LXV, Issue 1
Written by Minko ILIEV, Biser BOZHANSKI, Мagdalena PETKOVA, Tatyana BOZHANSKA
The experiment was conducted on a natural meadow type Chrysopogon gryllus - Agrostis capillaris, widespread in the mountainous regions of Bulgaria. Two regimes of use (PR-pasture and HR-haymaking) of grassland in the following variants concerning the harvesting period were studied: PR1 (Control: 31 May - 09 June); PR2 (10 June - 19 June); PR3 (20 June - 29 June) and HR1 (Control: 30 June - 9 July 9); HR2 (10 July - 19 July); HR3 (20 July - 31 July). It was found that the method and period of harvest in the natural mountain association affects the increase in yield and crude protein content. In the pasture and haymaking regime of use, the growth rate of the indicators was the highest, respectively, the highest crude protein production was registered during the harvesting period on 10-19 June (67.42%) and 20-30 July (129.16%), while the highest crude protein content was registered on 20-29 June (55.07%) and 20-30 July (69.95%). The highest increase in dry matter yield was registered in the second decade of June (10-20) for pasture use (14.42%) and at the end of July (20-31) for haymaking (35.77%).
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