Abstract
Alfalfa treated with four levels (0, 112, 224, 448 kg Mg/ha) of kieserite (MgSO4.H2O) fertilizer was harvested in first and regrowth cuttings in three years following initial application, and fed in digestibility, intake and mineral balance trials to growing lambs. Fertilization markedly increased the concentration of magnesium (from .20 to .32% in the 0 and 448 Mg/ha treatments, respectively, over all cuttings), with lesser effects on sulfur concentration (from .21 to .24%), and no effect on concentration of other minerals measured. Concentration increases declined with time after application. Over all trials with ad libitum feeding, magnesium fertilization had no effect on apparent absorption (AA) or availability of magnesium but increased magnesium retention (from .39 to .74 g/day at the 0 and 448 kg Mg/ha levels, respectively). Retention was found to be a curvilinear function of magnesium intake. Fertilization increased the AA of sulfur, had no effect on AA of calcium, phosphorus, potassium and nitrogen, and did not affect retention of calcium, phosphorus or nitrogen. In two trials in which regrowth alfalfa was fed at both ad libitum and restricted levels, lower dry matter intake resulted in an increased AA of magnesium, calcium, sulfur, potassium and nitrogen, and a decreased retention of magnesium, calcium, phosphorus and nitrogen. Level of kieserite fertilization had no effect on dry matter digestibility of the alfalfa, but intake was increased at the highest level (448 kg Mg/ha) of fertilization in the first 2 years after fertilizer application, with no effect in the third year. The increase in intake over the 0 treatment averaged 8.8 and 11.7% in the first and second years, respectively, with increases in individual cuttings ranging from 3.1 to 18.9%. Intake effects may have resulted, in part, from lower levels of cell-walls noted in alfalfa fertilized at higher levels of kieserite.
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Claims 14
Claim · model-written summary
Mg fertilization markedly increased the magnesium concentration of alfalfa (.20 to .32%).
- Taxon
- Alfalfa
Medicago sativae1 - Treatment
- kieserite (MgSO4.H2O) fertilizere1
- Outcome
- concentration of magnesiume2
- Direction
- increasede2
- Value
- .20 to .32%e2
- Comparator
- 0 treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effects of Magnesium Fertilization on Mineral Utilization and Nutritional Quality of Alfalfa for Lambs2”
e1“Alfalfa treated with four levels (0, 112, 224, 448 kg Mg/ha) of kieserite (MgSO4.H2O) fertilizer”
e2“Fertilization markedly increased the concentration of magnesium (from .20 to .32% in the 0 and 448 Mg/ha treatments, respectively, over all cuttings)”
e0“The increase in intake over the 0 treatment averaged 8.8 and 11.7% in the first and second years”
Claim · model-written summary
Mg fertilization had a lesser effect on sulfur concentration of alfalfa (.21 to .24%).
- Taxon
- AlfalfaMedicago sativae1
- Treatment
- kieserite (MgSO4.H2O) fertilizere1
- Outcome
- sulfur concentratione3
- Direction
- lesser effectse3
- Value
- .21 to .24%e3
- Comparator
- 0 treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effects of Magnesium Fertilization on Mineral Utilization and Nutritional Quality of Alfalfa for Lambs2”
e1“Alfalfa treated with four levels (0, 112, 224, 448 kg Mg/ha) of kieserite (MgSO4.H2O) fertilizer”
e3“with lesser effects on sulfur concentration (from .21 to .24%), and no effect on concentration of other minerals measured”
e0“The increase in intake over the 0 treatment averaged 8.8 and 11.7% in the first and second years”
Claim · model-written summary
Mg fertilization had no effect on the concentration of other minerals measured in alfalfa.
- Taxon
- AlfalfaMedicago sativae1
- Treatment
- kieserite (MgSO4.H2O) fertilizere1
- Outcome
- concentration of other minerals measurede3
- Direction
- no effecte3
- Comparator
- 0 treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effects of Magnesium Fertilization on Mineral Utilization and Nutritional Quality of Alfalfa for Lambs2”
e1“Alfalfa treated with four levels (0, 112, 224, 448 kg Mg/ha) of kieserite (MgSO4.H2O) fertilizer”
e3“no effect on concentration of other minerals measured”
e0“The increase in intake over the 0 treatment averaged 8.8 and 11.7% in the first and second years”
Claim · model-written summary
Magnesium fertilization increased magnesium retention in lambs fed alfalfa (.39 to .74 g/day).
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- magnesium fertilizatione4
- Outcome
- magnesium retentione4
- Direction
- increasede4
- Value
- .39 to .74 g/daye4
- Comparator
- 0 treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effects of Magnesium Fertilization on Mineral Utilization and Nutritional Quality of Alfalfa for Lambs2”
e4“magnesium fertilization had no effect on apparent absorption (AA) or availability of magnesium but increased magnesium retention (from .39 to .74 g/day at the 0 and 448 kg Mg/ha levels, respectively)”
e0“The increase in intake over the 0 treatment averaged 8.8 and 11.7% in the first and second years”
Claim · model-written summary
Magnesium fertilization had no effect on the apparent absorption of magnesium in lambs.
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- magnesium fertilizatione4
- Outcome
- apparent absorption (AA)e4
- Direction
- no effecte4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effects of Magnesium Fertilization on Mineral Utilization and Nutritional Quality of Alfalfa for Lambs2”
e4“magnesium fertilization had no effect on apparent absorption (AA) or availability of magnesium”
Claim · model-written summary
Fertilization increased the apparent absorption of sulfur.
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- Fertilizatione5
- Outcome
- AA of sulfure5
- Direction
- increasede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effects of Magnesium Fertilization on Mineral Utilization and Nutritional Quality of Alfalfa for Lambs2”
e5“Fertilization increased the AA of sulfur, had no effect on AA of calcium, phosphorus, potassium and nitrogen, and did not affect retention of calcium, phosphorus or nitrogen.”
Claim · model-written summary
Fertilization had no effect on the apparent absorption of calcium, phosphorus, potassium and nitrogen.
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- Fertilizatione5
- Outcome
- AA of calcium, phosphorus, potassium and nitrogene5
- Direction
- no effecte5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effects of Magnesium Fertilization on Mineral Utilization and Nutritional Quality of Alfalfa for Lambs2”
e5“Fertilization increased the AA of sulfur, had no effect on AA of calcium, phosphorus, potassium and nitrogen, and did not affect retention of calcium, phosphorus or nitrogen.”
Claim · model-written summary
Fertilization did not affect the retention of calcium, phosphorus or nitrogen in lambs.
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- Fertilizatione5
- Outcome
- retention of calcium, phosphorus or nitrogene5
- Direction
- did not affecte5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effects of Magnesium Fertilization on Mineral Utilization and Nutritional Quality of Alfalfa for Lambs2”
e5“Fertilization increased the AA of sulfur, had no effect on AA of calcium, phosphorus, potassium and nitrogen, and did not affect retention of calcium, phosphorus or nitrogen.”
Claim · model-written summary
Lower dry matter intake was associated with increased apparent absorption of magnesium, calcium, sulfur, potassium and nitrogen in regrowth alfalfa.
Verbatim
t0“Effects of Magnesium Fertilization on Mineral Utilization and Nutritional Quality of Alfalfa for Lambs2”
e6“In two trials in which regrowth alfalfa was fed at both ad libitum and restricted levels, lower dry matter intake resulted in an increased AA of magnesium, calcium, sulfur, potassium and nitrogen, and a decreased retention of magnesium, calcium, phosphorus and nitrogen.”
Claim · model-written summary
Lower dry matter intake was associated with decreased retention of magnesium, calcium, phosphorus and nitrogen in regrowth alfalfa.
Verbatim
t0“Effects of Magnesium Fertilization on Mineral Utilization and Nutritional Quality of Alfalfa for Lambs2”
e6“In two trials in which regrowth alfalfa was fed at both ad libitum and restricted levels, lower dry matter intake resulted in an increased AA of magnesium, calcium, sulfur, potassium and nitrogen, and a decreased retention of magnesium, calcium, phosphorus and nitrogen.”
Claim · model-written summary
Intake was increased by the highest Mg fertilization level (448 kg Mg/ha) in the first 2 years (8.8 and 11.7% in the first and second years).
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- highest level (448 kg Mg/ha) of fertilizatione7
- Outcome
- intakee7
- Direction
- increasede7
- Value
- 8.8 and 11.7%e0
- Qualifier
- in the first 2 yearse7
- Comparator
- 0 treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effects of Magnesium Fertilization on Mineral Utilization and Nutritional Quality of Alfalfa for Lambs2”
e7“intake was increased at the highest level (448 kg Mg/ha) of fertilization in the first 2 years after fertilizer application, with no effect in the third year”
e0“The increase in intake over the 0 treatment averaged 8.8 and 11.7% in the first and second years”
Claim · model-written summary
Intake showed no effect of the highest Mg fertilization level in the third year.
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- highest level (448 kg Mg/ha) of fertilizatione7
- Outcome
- intakee7
- Direction
- no effecte7
- Qualifier
- in the third yeare7
- Comparator
- 0 treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effects of Magnesium Fertilization on Mineral Utilization and Nutritional Quality of Alfalfa for Lambs2”
e7“intake was increased at the highest level (448 kg Mg/ha) of fertilization in the first 2 years after fertilizer application, with no effect in the third year”
e0“The increase in intake over the 0 treatment averaged 8.8 and 11.7% in the first and second years”
Claim · model-written summary
Level of kieserite fertilization had no effect on dry matter digestibility of alfalfa.
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- Level of kieserite fertilizatione7
- Outcome
- dry matter digestibilitye7
- Direction
- no effecte7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effects of Magnesium Fertilization on Mineral Utilization and Nutritional Quality of Alfalfa for Lambs2”
e7“Level of kieserite fertilization had no effect on dry matter digestibility of the alfalfa”
Claim · model-written summary
Intake effects of Mg fertilization may have resulted partly from lower levels of cell-walls in alfalfa (hypothesis).
- Taxon
- alfalfaMedicago sativae0
- Outcome
- Intake effectse0
- Qualifier
- lower levels of cell-wallse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effects of Magnesium Fertilization on Mineral Utilization and Nutritional Quality of Alfalfa for Lambs2”
e0“Intake effects may have resulted, in part, from lower levels of cell-walls noted in alfalfa fertilized at higher levels of kieserite.”
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