Reduce atmospheric carbon dioxide use Carbon Buster™ grasses and legumes
Panicum coloratum; Panicum coloratum var. makarikariense
Plant: Generally an erect, leafy perennial grass, with tussocks spreading by short underground stems (rhizomes) to over 90 cm in diameter; leafy to about 1m and growing to over 1.5m at flowering.
Stems: Flowering stems are robust, waxy, and branching; nodes are elbow-shaped and slightly enlarged.
Leaves: Leaves are waxy and largely hairless, bluish-green, up to 45 cm long and 1.3 cm wide, with a prominent white, midrib.
Seeds: Seeds are smooth and shiny, oval to elliptical in shape, and brown to grey-black in colour; 1.6 million seeds/kg.
Seedhead: The flower head is a large, open, panicle to over 30cm long; the developing seeds are green tinged with purple giving a flowering stand a purplish appearance.
Used in grazed pastures on heavy, cracking-clay soils, particularly for cattle grazing; usually sown with legumes; can be cut for hay while leafy and before it matures.
Bambatsi is particularly well adapted to deep, alkaline, dark, heavy, cracking clay soils of moderate to high fertility, and with poor internal drainage, as are common in the northern grain belt in Australia. These soils can become wet during summer and dry in the winter. While it also grows on lighter friable clay and clay–loam soils, it is poorly adapted to light loams and sands. It can tolerate moderate levels of soil salinity.
Established plants have some frost tolerance and retain green material longer after the onset of frosts than many improved tropical grasses.
Grasses: Carbon Buster™ guinea grass mix, purple pigeon grass, rhodes grass, Floren bluegrass, Queensland bluegrass; creeping bluegrass (on more friable clays).
S Qld/N NSW: annual medics, lucerne, desmanthus
Central Qld: butterfly pea, desmanthus, lucerne.
Sowing/planting rates as single species
Sown at 2-4 kg/ha; while seed quality is usually high; it is advisable to sow 1-year old seed as fresh seed its likely to be dormant.
Sowing/planting rates in mixtures
Sow at a pro rata rate depending on the number of species sown in the mixture; sowing rate is unchanged when sown with legumes.
Bambatsi is much slower to establish than rhodes grass or green panic. It is best sown between mid-January and mid-March to coincide with the highest probability of post-sowing rain. However, if there is a profile of subsoil water, sowing may be planned for mid-November or December (perhaps into standing winter crop stubble), or for late August-early September.
Generally sown on fertile soils; responds to N fertiliser, possibly to P and S on very alkaline soils.
It is generally sown into fertile soils with high levels of nitrogen available initially, or with legumes that supply nitrogen. In grass pastures without legumes and where available soil nitrogen is low or declining, nitrogen fertiliser at about 100 kg N/ha/yr may be required to maintain productivity.
Bambatsi panic is slow to establish, and in dense, establishing stands of grass mixtures, early grazing is advised to reduce the competition. However, while mature stands withstand short-term heavy grazing, Bambatsi should be grazed only lightly during the establishment year. Being so palatable, it is selectively grazed if sown with purple pigeon grass.
Ability to spread
Bambatsi panic does not colonise readily owing to the difficult conditions for establishment in existing swards, except during very wet conditions.
No significant insect pests.
No significant diseases though susceptible to maize streak virus.
Tolerant of pre-emergent propazine and triasulfuron,; Susceptible to pre-emergent atrazine, ametryne, prometryne, propazine, linuron, pendimethalin, alachlor, metolachlor, propachlor, metsulfuron methyl and imazapic; Tolerant of post-emergent propachlor, metolachlor, triasulfuron, propazine, and metsulfuron methyl but susceptible to other post-emergent herbicides; Susceptible to 2,4-D and dicamba up to the 5-leaf stage but safe in established swards; Established stands are tolerant of picloram, but rates should be checked.
High quality feed; crude protein levels of 19% when young and leafy decline to 5% when mature; digestibility of about 60% in leafy, 3-6 week old regrowth, with % crude protein declining to 12-15% and digestibility to 47% after 10 weeks regrowth; at these levels, the capacity for liveweight gain declines dramatically. Mature, hayed-off dry matter is of a very low quality.
Very palatable when young, declining with maturity.
DM yields of 8-23 t/ha (commonly 10 t/ha) have been recorded, depending on rainfall and soil fertility. In a grazing trial, Bambatsi panic/lucerne pastures persisted better and produced more dry matter and sheep liveweight than Rhodes grass/lucerne pastures in dry conditions on the Darling Downs, Queensland.
Photosensitisation has occurred in sheep, goats, cattle and horses grazing Bambatsi panic pastures, but the condition is rare; sheep are the most vulnerable with lambs in stressed condition e.g. after shearing, trucking, that are placed on early regrowth following dry conditions, the most at risk; this toxicity disrupts liver function and lamb deaths have been recorded.
Bambatsi is the only cultivar commercially available.