Abstract
A field experiment was established in 1984 at Changwu, Shaanxi, China, to determine the long-term effects of three annual fertiliser and/or manure treatments [no fertilisation (CK), application of phosphorus (P) fertiliser alone at 26 kg P ha–1, and application of P fertiliser at 26 kg P ha–1 + nitrogen (N) fertiliser at 120 kg N ha–1 + animal manure at 75 Mg ha–1 (PNM)] to alfalfa (Medicago sativa L.) on forage dry matter yield (DMY) from 1985 to 2008 (24 growing seasons), and some soil properties (moisture content, and concentration of organic matter, total N, total P and available P in soil) in 2001, 2004 and 2006. Compared with the unfertilised CK, application of fertiliser and/or manure resulted in a significant increase of forage DMY in 19 of 24 years, with a maximum DMY usually in the PNM treatment. Cumulative DMY over 24 years (from 1985 to 2008) increased linearly in all three treatments, and it was higher by 22.72 Mg ha–1 with PNM and only by 7.78 Mg ha–1 with P compared with the CK treatment. Soil moisture contents in deep soil profiles did not differ among treatments in most cases. Soil organic matter, total N, total P and available P in soil increased with fertiliser and/or manure treatments, especially when PNM was applied over a long period. In conclusion, the findings suggest that combined applications of inorganic fertilisers and organic manure to alfalfa can provide substantial benefits in terms of both forage yield and stand longevity, while also improving soil quality on the Loess Plateau of northern China.
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Claims 7
Claim · model-written summary
Fertilizer or manure significantly increased alfalfa forage dry matter yield in 19 of 24 years.
- Taxon
- alfalfa
Medicago sativat0 - Treatment
- application of fertiliser and/or manuree0
- Outcome
- forage DMYe0
- Direction
- increasee0
- Value
- 19 of 24 yearse0
- Comparator
- unfertilised CKe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with the unfertilised CK, application of fertiliser and/or manure resulted in a significant increase of forage DMY in 19 of 24 years”
t0“alfalfa”
Claim · model-written summary
PNM usually produced maximum forage dry matter yield.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- PNM treatmente0
- Outcome
- DMYe0
- Direction
- maximume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maximum DMY usually in the PNM treatment.”
t0“alfalfa”
Claim · model-written summary
Cumulative dry matter yield was 22.72 Mg ha–1 higher with PNM than CK.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- PNMe0
- Outcome
- Cumulative DMYe1
- Direction
- highere0
- Value
- 22.72 Mg ha–1e0
- Comparator
- CK treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it was higher by 22.72 Mg ha–1 with PNM and only by 7.78 Mg ha–1 with P compared with the CK treatment.”
t0“alfalfa”
e1“Cumulative DMY over 24 years”
Claim · model-written summary
Cumulative dry matter yield was 7.78 Mg ha–1 higher with P than CK.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- Pe0
- Outcome
- Cumulative DMYe1
- Direction
- highere0
- Value
- 7.78 Mg ha–1e0
- Comparator
- CK treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it was higher by 22.72 Mg ha–1 with PNM and only by 7.78 Mg ha–1 with P compared with the CK treatment.”
t0“alfalfa”
e1“Cumulative DMY over 24 years”
Claim · model-written summary
Deep soil moisture mostly did not differ among fertilizer treatments.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- treatmentse0
- Outcome
- Soil moisture contents in deep soil profilese0
- Direction
- did not differe0
- Comparator
- among treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil moisture contents in deep soil profiles did not differ among treatments in most cases.”
t0“alfalfa”
Claim · model-written summary
Fertilizer or manure increased soil organic matter, total N, total P, and available P, especially long term PNM.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- fertiliser and/or manure treatmentse0
- Outcome
- Soil organic matter, total N, total P and available P in soile0
- Direction
- increasede0
- Qualifier
- especially when PNM was applied over a long periode0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil organic matter, total N, total P and available P in soil increased with fertiliser and/or manure treatments, especially when PNM was applied over a long period.”
t0“alfalfa”
Claim · model-written summary
Combined inorganic fertilizer and manure may benefit alfalfa yield and stand longevity while improving soil quality.
- Taxon
- alfalfaMedicago sativae0
- Outcome
- combined applications of inorganic fertilisers and organic manuree0
- Setting
- Loess Plateau of northern Chinae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“combined applications of inorganic fertilisers and organic manure to alfalfa can provide substantial benefits in terms of both forage yield and stand longevity, while also improving soil quality on the Loess Plateau of northern China.”
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See all 184 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.