Abstract
Abstract Dairy cattle manure was incorporated in plots of Decatur silty clay loam (Thermic Rhodic Paleudults) at rates of 0, 22, 44, 89, 178, and 267 metric tons/ha (dry weight) for 3 successive years. Pearl millet ( Pennisetum americanum L. K. Schum) was grown in summer and was clipped twice and ‘Wrens Abruzzi’ rye ( Secale cereale L.) was grown as a winter cover crop. Annual applications of 22 and 44 metric tons/ha manure were more effective than higher rates in stimulating millet growth, but rye forage yields were generally not influenced by manure application. The uptake of P, Ca, and Mg tended to level out at 44 tons/ha, but the removal of N, K, NO 3 ‐N, and Na by millet and rye from the soil continued to increase with the rate of manure applied. The high rates of manure caused excessive accumulation of nitrate in plants and soils. The range of nitrate‐N in millet was 5,037 to 8,675 ppm at 178 and 267 metric tons/ha compared with 602 to 4.010 ppm on the NPK check plots. Nitrate‐N in the top 90 cm of the soil over the 3 years averaged 840 kg/ha at 178 and 267 tons/ha compared with 239 kg/ha of NO 3 ‐N on the check. Dry matter and soil and plant analyses indicated that 44 metric tons/ha was the highest annual application rate of manure that could be used on this soil with consistent increases in plant growth and nutrient uptake and without excessive nitrate accumulation in soils and plants.
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Claims 7
Claim · model-written summary
Annual 22 and 44 metric tons/ha manure stimulated millet growth more than higher rates.
Verbatim
e0“Annual applications of 22 and 44 metric tons/ha manure were more effective than higher rates in stimulating millet growth”
Claim · model-written summary
Rye forage yields were generally unaffected by manure application.
- Taxon
- rye
Secale cerealee0 - Treatment
- manure applicatione0
- Outcome
- rye forage yieldse0
- Direction
- not influencede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rye forage yields were generally not influenced by manure application”
Claim · model-written summary
Uptake of P, Ca and Mg tended to level out at 44 tons/ha.
Verbatim
e0“The uptake of P, Ca, and Mg tended to level out at 44 tons/ha”
t0“Millet and Rye”
Claim · model-written summary
Millet and rye removal of N, K, NO 3 ‐N and Na increased with manure rate.
Verbatim
e0“the removal of N, K, NO 3 ‐N, and Na by millet and rye from the soil continued to increase with the rate of manure applied”
Claim · model-written summary
High manure rates caused excessive nitrate accumulation in plants.
- Taxon
- Millet and Ryet0
- Treatment
- high rates of manuree0
- Outcome
- accumulation of nitrate in plantse0
- Direction
- excessivee0
Not reportedComparator
Verbatim
e0“The high rates of manure caused excessive accumulation of nitrate in plants and soils”
t0“Millet and Rye”
Claim · model-written summary
Millet nitrate-N was 5,037 to 8,675 ppm at 178 and 267 metric tons/ha manure.
Verbatim
e0“nitrate‐N in millet was 5,037 to 8,675 ppm at 178 and 267 metric tons/ha compared with 602 to 4.010 ppm on the NPK check plots”
Claim · model-written summary
The authors identify 44 metric tons/ha as the highest annual manure rate compatible with growth and nutrient uptake without excessive nitrate.
Verbatim
e0“44 metric tons/ha was the highest annual application rate of manure that could be used on this soil with consistent increases in plant growth and nutrient uptake and without excessive nitrate accumulation in soils and plants”
t0“Millet and Rye”
The same questions in other papers
fertilization · yield · Secale cereale (rye)Positive and negative results
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See all 52 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.