Abstract
Recently many dairy farmers have sown turnips as a summer feed for lactating cows. This paper reports on a national survey of turnip crops in 1994-95, an experiment on turnip yield responses to N fertiliser and two short-term supplementary feeding trials. Farmers had on average 4.3% of their farms in turnips with a mean yield of 7.4 t DM/ha (range 0 to 15.2 t DM/ha) (n = 328). Barkant was the highest yielding cultivar and mixtures yielded significantly less than Barkant alone. Rainfall in November and December but not January was positively associated with turnip yield. Fertiliser N after sowing increased turnip yield by 13.2 kg D/kg N, but fertiliser N at sowing or P fertiliser in the three months to sowing had no effect on yield. In contrast to the survey, application of 25, 50, 100 or 200 kg N/ha after sowing at TARS gave no significant increase in total DM yield. Supplementing pasture with 3.6 and 5 kg turnip DM/cow/day at DRC and TARS gave milksolids responses of 26 and 18% respectively compared to pasture only. The survey highlighted the variability of turnip yield, and although many growers reached the economic break-even point of 8-10 t DM/ha, there are less risky alternatives to summer turnips such as purchased maize silage and pasture from N-boosted spring pasture. Keywords: Barkant turnips, brassica, dairying, farm survey, milksolids, nitrogen
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Claims 12
Claim · model-written summary
Barkant was the highest yielding turnip cultivar.
- Taxon
- turnips
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Brassica rapa subsp. rapae0 - Material
- Barkante1
- Outcome
- yielde1
- Direction
- highest yieldinge1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Recently many dairy farmers have sown turnips as a summer feed for lactating cows”
e1“Barkant was the highest yielding cultivar”
Claim · model-written summary
Turnip mixtures yielded significantly less than Barkant alone.
- Taxon
- turnipsBrassica rapa subsp. rapae0
- Treatment
- mixturese2
- Outcome
- yielde2
- Direction
- significantly lesse2
- Comparator
- Barkant alonee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Recently many dairy farmers have sown turnips as a summer feed for lactating cows”
e2“mixtures yielded significantly less than Barkant alone”
Claim · model-written summary
Rainfall in November and December was positively associated with turnip yield.
- Taxon
- turnipsBrassica rapa subsp. rapae0
- Treatment
- Rainfall in November and Decembere3
- Outcome
- turnip yielde3
- Direction
- positively associatede3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Recently many dairy farmers have sown turnips as a summer feed for lactating cows”
e3“Rainfall in November and December but not January was positively associated with turnip yield”
Claim · model-written summary
Rainfall in January was not associated with turnip yield.
- Taxon
- turnipsBrassica rapa subsp. rapae0
- Treatment
- Rainfalle3
- Outcome
- turnip yielde3
- Qualifier
- but not Januarye3
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Recently many dairy farmers have sown turnips as a summer feed for lactating cows”
e3“Rainfall in November and December but not January was positively associated with turnip yield”
Claim · model-written summary
Fertiliser N applied after sowing increased turnip yield by 13.2 kg D/kg N.
- Taxon
- turnipsBrassica rapa subsp. rapae0
- Treatment
- Fertiliser N after sowinge4
- Outcome
- turnip yielde4
- Direction
- increasede4
- Value
- 13.2 kg D/kg Ne4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Recently many dairy farmers have sown turnips as a summer feed for lactating cows”
e4“Fertiliser N after sowing increased turnip yield by 13.2 kg D/kg N”
Claim · model-written summary
Fertiliser N at sowing or P fertiliser in the three months to sowing had no effect on yield.
- Taxon
- turnipsBrassica rapa subsp. rapae0
- Treatment
- fertiliser N at sowing or P fertiliser in the three months to sowinge5
- Outcome
- yielde5
- Direction
- no effecte5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Recently many dairy farmers have sown turnips as a summer feed for lactating cows”
e5“fertiliser N at sowing or P fertiliser in the three months to sowing had no effect on yield”
Claim · model-written summary
Application of 25, 50, 100 or 200 kg N/ha after sowing at TARS gave no significant increase in total DM yield.
- Taxon
- turnipsBrassica rapa subsp. rapae0
- Treatment
- application of 25, 50, 100 or 200 kg N/ha after sowinge6
- Outcome
- total DM yielde6
- Direction
- no significant increasee6
- Setting
- TARSe6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Recently many dairy farmers have sown turnips as a summer feed for lactating cows”
e6“application of 25, 50, 100 or 200 kg N/ha after sowing at TARS gave no significant increase in total DM yield”
Claim · model-written summary
Supplementing pasture with turnip DM at DRC and TARS raised milksolids responses of 26 and 18% compared with pasture only.
- Taxon
- turnipBrassica rapa subsp. rapae7
- Treatment
- Supplementing pasture with 3.6 and 5 kg turnip DM/cow/daye7
- Outcome
- milksolidse7
- Direction
- increaseinferrede7
- Value
- 26 and 18%e7
- Comparator
- pasture onlye7
- Setting
- DRC and TARSe7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“Supplementing pasture with 3.6 and 5 kg turnip DM/cow/day at DRC and TARS gave milksolids responses of 26 and 18% respectively compared to pasture only”
Claim · model-written summary
Farmers had 4.3% of their farms in turnips.
- Taxon
- turnipsBrassica rapa subsp. rapae0
- Outcome
- farms in turnipse7
- Value
- 4.3%e7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Recently many dairy farmers have sown turnips as a summer feed for lactating cows”
e7“Farmers had on average 4.3% of their farms in turnips with a mean yield of 7.4 t DM/ha (range 0 to 15.2 t DM/ha) (n = 328)”
Claim · model-written summary
Mean turnip yield in the farm survey was 7.4 t DM/ha.
- Taxon
- turnipsBrassica rapa subsp. rapae0
- Outcome
- mean yielde7
- Value
- 7.4 t DM/hae7
- Qualifier
- range 0 to 15.2 t DM/hae7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Recently many dairy farmers have sown turnips as a summer feed for lactating cows”
e7“Farmers had on average 4.3% of their farms in turnips with a mean yield of 7.4 t DM/ha (range 0 to 15.2 t DM/ha) (n = 328)”
Claim · model-written summary
Many growers reached the economic break-even point of 8-10 t DM/ha.
- Taxon
- turnipsBrassica rapa subsp. rapae0
- Outcome
- economic break-even pointe7
- Value
- 8-10 t DM/hae7
- Qualifier
- many growers reachede7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Recently many dairy farmers have sown turnips as a summer feed for lactating cows”
e7“many growers reached the economic break-even point of 8-10 t DM/ha”
Claim · model-written summary
There are less risky alternatives to summer turnips, such as purchased maize silage and pasture from N-boosted spring pasture.
- Taxon
- summer turnipsBrassica rapa subsp. rapae7
- Outcome
- purchased maize silage and pasture from N-boosted spring pasturee7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Recently many dairy farmers have sown turnips as a summer feed for lactating cows”
e7“there are less risky alternatives to summer turnips such as purchased maize silage and pasture from N-boosted spring pasture”
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