Abstract
‘Managing Acid Soils Through Efficient Rotations (MASTER)’ is a long-term pasture–crop rotation experiment commenced in 1992. One of the objectives was to demonstrate the extent of crop, pasture, and animal responses to lime on a typical acidic soil in the 500–800 mm rainfall zone in south-eastern Australia. Two types of pastures (perennial v. annual pastures) with or without lime application were established in 1992. This paper presents the results of the pasture dry matter (DM) responses to lime application over 6 years from 1992 to 1997. Results showed that both perennial and annual pastures responded positively to lime on a highly acidic soil on the south-west slopes of New South Wales. Averaged across pasture types and 5 growing seasons, the limed pastures produced 18% more pasture DM (520 kg/ha, P < 0.05) than the unlimed pastures. Significant responses to lime were detected on perennial pastures (610 kg DM/ha, P < 0.05), but not on annual pastures, although the limed annual pastures produced more DM (420 kg/ha, P = 0.20) than the unlimed annual pastures. There was a large seasonal variation in pasture growth rate with the significant lime responses in winter and spring on both perennial pastures (P < 0.05) and annual pastures (P < 0.10 in winter and P < 0.05 in spring), but no responses in autumn and summer on either perennial or annual pastures. The extra growth in winter is of importance as winter is the period when feed is normally inadequate and limits stocking rates. It is recommended that perennial-based pastures should be promoted for the purposes of productivity, in terms of increasing pasture production and improving feed quality, and for the environmental benefits in terms of alleviating the soil acidity problem and reducing the risk of dryland salinity in the high-rainfall zone in south-eastern Australia.
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Claims 7
Claim · model-written summary
Limed pastures produced 18% more dry matter overall.
Verbatim
e0“limed pastures produced 18% more pasture DM (520 kg/ha, P < 0.05) than the unlimed pastures”
Claim · model-written summary
Lime increased perennial pasture dry matter by 610 kg/ha.
- Taxon
- perennial pasturese0
- Treatment
- limee0
- Outcome
- responsese0
- Value
- 610 kg DM/hae0
- Comparator
- unlimed pasturese1
Not reportedDirection
Verbatim
e0“Significant responses to lime were detected on perennial pastures (610 kg DM/ha, P < 0.05)”
e1“unlimed pastures”
Claim · model-written summary
Annual pasture dry matter was 420 kg/ha higher with lime without statistical significance.
Verbatim
e0“limed annual pastures produced more DM (420 kg/ha, P = 0.20) than the unlimed annual pastures”
Claim · model-written summary
Perennial pasture growth responded significantly to lime in winter and spring.
Not reportedComparatorDirection
Verbatim
e0“significant lime responses in winter and spring on both perennial pastures (P < 0.05)”
Claim · model-written summary
Annual pasture growth responded significantly to lime in winter and spring.
Not reportedComparatorDirection
Verbatim
e0“annual pastures (P < 0.10 in winter and P < 0.05 in spring)”
e1“significant lime responses in winter and spring”
Claim · model-written summary
Neither pasture type responded to lime in autumn and summer.
Not reportedComparator
Verbatim
e0“no responses in autumn and summer on either perennial or annual pastures”
e1“lime responses”
Claim · model-written summary
Authors recommend promoting perennial based pastures for production, feed quality and environmental benefits.
Verbatim
e0“perennial-based pastures should be promoted for the purposes of productivity, in terms of increasing pasture production and improving feed quality, and for the environmental benefits in terms of alleviating the soil acidity problem and reducing the risk of dryland salinity”