Abstract
The quality and production of forage oats (Avena sativa cv. Acacia) sown on five occasions between late summer and late autumn was measured in an experiment near Armidale, New South Wales. Additional treatments were nil vs. 71 kg ha-1 nitrogen (N) and non-irrigated vs. supplementary irrigation. Nitrogen fertilizer did not significantly affect plant establishment, or the dry matter or digestible organic matter production from any sowing. Plant establishment declined linearly in association with reductions in the mean ambient temperature during the ten days after sowing. Crops sown on February 25 and March 13 produced at least 35 per cent more forage (P < 0.05) with irrigation than dryland crops but with all later sowings the effect of irrigation was not significant. Early sown crops contained up to 36 per cent senescent leaf and 44 per cent dead leaf in August. Organic matter digestibility contents of green and senescent forage differed little and always exceeded 69 per cent, but that of the dead leaf was at times as low as 45 per cent. Equations are presented relating digestible organic matter available in irrigated and non-irrigated treatments to the length and mean temperature of the growth period.
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Claims 11
Claim · model-written summary
Nitrogen fertilizer did not significantly affect establishment.
- Taxon
- forage oatst0
- Treatment
- Nitrogen fertilizere0
- Outcome
- plant establishmente0
- Direction
- did not significantly affecte0
Not reportedComparator
Verbatim
e0“Nitrogen fertilizer did not significantly affect plant establishment”
t0“forage oats”
Claim · model-written summary
Nitrogen fertilizer did not significantly affect dry matter production.
- Taxon
- forage oatst0
- Treatment
- Nitrogen fertilizere0
- Outcome
- dry mattere0
- Direction
- did not significantly affecte0
Not reportedComparator
Verbatim
e0“Nitrogen fertilizer did not significantly affect plant establishment, or the dry matter or digestible organic matter production from any sowing”
t0“forage oats”
Claim · model-written summary
Nitrogen fertilizer did not significantly affect digestible organic matter production.
- Taxon
- forage oatst0
- Treatment
- Nitrogen fertilizere0
- Outcome
- digestible organic matter productione0
- Direction
- did not significantly affecte0
Not reportedComparator
Verbatim
e0“Nitrogen fertilizer did not significantly affect plant establishment, or the dry matter or digestible organic matter production from any sowing”
t0“forage oats”
Claim · model-written summary
Plant establishment declined with lower post-sowing ambient temperature.
Verbatim
e0“Plant establishment declined linearly in association with reductions in the mean ambient temperature during the ten days after sowing”
t0“forage oats”
Claim · model-written summary
Irrigation increased forage of February 25 and March 13 sowings by at least 35 percent.
Verbatim
e0“Crops sown on February 25 and March 13 produced at least 35 per cent more forage (P < 0.05) with irrigation than dryland crops”
t0“forage oats”
Claim · model-written summary
Irrigation effects were not significant in later sowings.
- Taxon
- forage oatst0
- Treatment
- irrigatione0
- Outcome
- effect of irrigatione0
- Direction
- not significante0
- Qualifier
- later sowingse0
Not reportedComparator
Verbatim
e0“with all later sowings the effect of irrigation was not significant”
t0“forage oats”
Claim · model-written summary
Early crops had up to 36 percent senescent leaf.
Verbatim
e0“Early sown crops contained up to 36 per cent senescent leaf”
t0“forage oats”
Claim · model-written summary
Early crops had 44 percent dead leaf.
Verbatim
e0“44 per cent dead leaf in August”
t0“forage oats”
Claim · model-written summary
Green and senescent forage digestibility differed little and exceeded 69 percent.
Verbatim
e0“Organic matter digestibility contents of green and senescent forage differed little and always exceeded 69 per cent”
t0“forage oats”
Claim · model-written summary
Dead leaf digestibility fell as low as 45 percent.
Verbatim
e0“that of the dead leaf was at times as low as 45 per cent”
t0“forage oats”
Claim · model-written summary
Equations related digestible organic matter availability to growth-period length and temperature.
Verbatim
e0“Equations are presented relating digestible organic matter available in irrigated and non-irrigated treatments to the length and mean temperature of the growth period”
t0“forage oats”
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