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Effects of fertilizer and stocking rate on pasture and beef production from sown pastures in northern cape york peninsula part 2 beef production and its relation to blood fecal and pasture measurements



Effects of fertilizer and stocking rate on pasture and beef production from sown pastures in northern cape york peninsula part 2 beef production and its relation to blood fecal and pasture measurements



Australian Journal of Experimental Agriculture and Animal Husbandry 17(85): 187-196



The animal production from 2 grass/legume pastures was measured over 3 yr. The pastures were grazed at 4 stocking rates and annually received 1 of 3 maintenance rates of P fertilizer. The animals were given a P supplement at 2 rates. The grasses were either Brachiaria decumbens cv. Basilisk or Panicum maximum (common guinea grass) each sown with Stylosanthes guyanensis cv. Endeavour and Macroptilium atropurpurum cv. Siratro. The grasses had little effect on animal production although 3 Panicum pastures at higher stocking rates became overgrazed and required destocking during the experiment. Even though 73.5 kg ha-1 of P was used to establish the pastures, the maintenance rate of 40 kg ha-1 gave higher production than the 10 kg ha-1 rate in the first 2 yr. In the 3rd yr., production was similar for each fertilizer rate. There was a concomitant rise in fecal P level with fertilizer rate but no such effect was blood inorganic P levels. Over the 3 yr of the experiment the liveweight gain per ha was similar (mean of 0.54 kg/day) at 1.7 and 1.9 beasts ha-1 but was significantly less at lighter stocking rates. In the last 2 yr stocking rate did not significantly affect liveweight gain per head. At the highest stocking rate, gains were greater during the wet season and losses greater during the dry season than those at the lowest stocking rate. The P supplement did not affect live weight gain but increased blood inorganic P levels. The relationships of animal production with blood and fecal compositions and with the pasture measurements described in a previous paper are discussed.

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Effects of fertilizer and stocking rate on pasture and beef production from sown pastures in northern Cape York Peninsula. 2. beef production and its relation to blood, faecal and pasture measurements. Australian journal of experimental agriculture and animal husbandry: 17 (85) 187-196, 1977

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