Performance of nitrogen fertilised temperate grasses and temperate grass-clover mixtures in coastal south-east Queensland
1984
Stillman, S.L. | Cameron, D.G. (Queensland Dept. of Primary Industries, Brisbane (Australia). Agriculture Branch) | Mulder, J.C. (Queensland Dept. of Primary Industries, Townsville (Australia). Agriculture Branch)
Dry matter production of nitrogen-fertilised temperate grasses, including ryegrasses and oats (Avena strigosa cv. Saia), was compared at two planting rates. Kangaroo Valley ryegrass (Lolium perenne) was also grown without nitrogen and in mixtures with various clovers. The experiments were conducted at four sites, two raingrown and two irrigated, from 1972 to 1975. Raingrown Saia oats produced the most forage, but reacted unfavourably to the cutting height and frequency possible with irrigation. When irrigated, the annual ryegrasses (L.rigidum and L. multiflorum) gave good early production, though late season production of the perennial ryegrasses was better. Inclusion of various clovers or mixing oats with Kangaroo Valley ryegrass did not improve the yield. Clovers did not compensate for the lack of nitrogen application although the mixtures outyielded unfertilised Kangaroo Valley. When nitrogen was applied to the ryegrass-clover mixture clover yields were drastically reduced.
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