Yield of green mass and productivity of cuttings of sylphium perfoliate depending on the stage of plant development in the north-eastern part of Belarus

Abstract

The article analyzes the results of the multi-year research on sylphium productivity depending on the stage of the plant development of the first cutting. Silfium can be cultivated in green conveyor as a productive two-cut fodder crop (610,4 c/ha of green mass, yield of raw material – 96,6 c/ha, crude protein – 9,59 c/ha, ME – 111,4 GJ/ha and CE – 104,0 c/ha). The first cut is made at the stalking-budding stage for green fodder. It can be used as a highly productive single-cut crop (yield of green mass 670,3 c/ha, yield of raw material – 124,0 c/ha, crude protein – 9,92 c, ME – 124,0 GJ/ha, KE – 99,2 c/ha) in the raw material conveyor for silage at the dichasia stage of anthodium flowering.