|
Registro Completo |
|
Biblioteca(s): |
Embrapa Agrobiologia. |
|
Data corrente: |
03/08/2001 |
|
Data da última atualização: |
03/08/2001 |
|
Autoria: |
TEASDALE, J. R.; ROSECRANCE, R. C.; COFFMAN, C. B.; STARR, J. L.; PALTINEANU, I. C.; LU, Y. C.; WATKINS, B. K. |
|
Título: |
Performance of reduce- tillage cropping systems for sustainable grain production in Maryland. |
|
Ano de publicação: |
2000 |
|
Fonte/Imprenta: |
American Journal of Alternative Agriculture, Greenbelt, v.15, n.2, p.79-87, 2000. |
|
Idioma: |
Inglês |
|
Conteúdo: |
Sustainable production systems are needed to maintain soil resources and reduce environmental contamination on erodible lands that are incompatible with tillage-intensive operations. A long-term cropping systems comparison was established at Beltsville, Maryland, on a site with 2 to 15% slope to evaluate the efficacy of sustainable strategies compatible with reduced-tillage systems. All systems followed a 2-year rotation of corn the first year and winter wheat followed by soybean the second year. Treatments included (1) no-tillage system with recommended fertilizer and herbicide inputs, (2) crownvetch living mulch system with similar inputs to the no-tillage systems, (3) cover crop system including a hairy vetch cover crop before corn and a wheat cover crop before soybean with reduced fertilizer and herbicide inputs, and (4) manure system including crimson clover green manure plus cow manure for nutrient sources, chisel plow/disk for incorporating manure, and rotary hoe plus cultivation for weed control. Results from the initial 4 years demonstrated the relative productivity of these systems. Corn yields were similar in the no-tillage and cover crop systems in each year; both systems averaged 7.8 Mg ha-1 compared to 5.7 Mg ha-1 in both the crownvetch and manure systems. Wheat yields were highest in the first 2 years and in the crownvetch systems in the last 2 years. Soybean yields were highest in the cover crop system in all years. The manure system usually had lower yields than the highest yielding systems, partly because of competition from uncontrolled weeds. Several measures of the efficiency of grain production were evaluated. The no-tillage system produced the most grain per total vegetative biomass throughout the rotation. The cover crop system produced the most grain per unit of external nitrogen input and, along with the no-tillage system, had the highest corn water-use efficiency. The cover crop system also recycled the most vegetative residues and nutrients of all systems. No single system performed best according to all measures of comparison, suggesting that trade-offs will be required when choosing production systems. MenosSustainable production systems are needed to maintain soil resources and reduce environmental contamination on erodible lands that are incompatible with tillage-intensive operations. A long-term cropping systems comparison was established at Beltsville, Maryland, on a site with 2 to 15% slope to evaluate the efficacy of sustainable strategies compatible with reduced-tillage systems. All systems followed a 2-year rotation of corn the first year and winter wheat followed by soybean the second year. Treatments included (1) no-tillage system with recommended fertilizer and herbicide inputs, (2) crownvetch living mulch system with similar inputs to the no-tillage systems, (3) cover crop system including a hairy vetch cover crop before corn and a wheat cover crop before soybean with reduced fertilizer and herbicide inputs, and (4) manure system including crimson clover green manure plus cow manure for nutrient sources, chisel plow/disk for incorporating manure, and rotary hoe plus cultivation for weed control. Results from the initial 4 years demonstrated the relative productivity of these systems. Corn yields were similar in the no-tillage and cover crop systems in each year; both systems averaged 7.8 Mg ha-1 compared to 5.7 Mg ha-1 in both the crownvetch and manure systems. Wheat yields were highest in the first 2 years and in the crownvetch systems in the last 2 years. Soybean yields were highest in the cover crop system in all years. The manure system usually had lower yields ... Mostrar Tudo |
|
Thesagro: |
Cobertura do Solo; Erva Daninha; Soja; Trigo. |
|
Thesaurus Nal: |
corn; cover crops; soybeans; weeds; wheat. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 02979naa a2200301 a 4500
001 1621224
005 2001-08-03
008 2000 bl --- 0-- u #d
100 1 $aTEASDALE, J. R.
245 $aPerformance of reduce- tillage cropping systems for sustainable grain production in Maryland.
260 $c2000
520 $aSustainable production systems are needed to maintain soil resources and reduce environmental contamination on erodible lands that are incompatible with tillage-intensive operations. A long-term cropping systems comparison was established at Beltsville, Maryland, on a site with 2 to 15% slope to evaluate the efficacy of sustainable strategies compatible with reduced-tillage systems. All systems followed a 2-year rotation of corn the first year and winter wheat followed by soybean the second year. Treatments included (1) no-tillage system with recommended fertilizer and herbicide inputs, (2) crownvetch living mulch system with similar inputs to the no-tillage systems, (3) cover crop system including a hairy vetch cover crop before corn and a wheat cover crop before soybean with reduced fertilizer and herbicide inputs, and (4) manure system including crimson clover green manure plus cow manure for nutrient sources, chisel plow/disk for incorporating manure, and rotary hoe plus cultivation for weed control. Results from the initial 4 years demonstrated the relative productivity of these systems. Corn yields were similar in the no-tillage and cover crop systems in each year; both systems averaged 7.8 Mg ha-1 compared to 5.7 Mg ha-1 in both the crownvetch and manure systems. Wheat yields were highest in the first 2 years and in the crownvetch systems in the last 2 years. Soybean yields were highest in the cover crop system in all years. The manure system usually had lower yields than the highest yielding systems, partly because of competition from uncontrolled weeds. Several measures of the efficiency of grain production were evaluated. The no-tillage system produced the most grain per total vegetative biomass throughout the rotation. The cover crop system produced the most grain per unit of external nitrogen input and, along with the no-tillage system, had the highest corn water-use efficiency. The cover crop system also recycled the most vegetative residues and nutrients of all systems. No single system performed best according to all measures of comparison, suggesting that trade-offs will be required when choosing production systems.
650 $acorn
650 $acover crops
650 $asoybeans
650 $aweeds
650 $awheat
650 $aCobertura do Solo
650 $aErva Daninha
650 $aSoja
650 $aTrigo
700 1 $aROSECRANCE, R. C.
700 1 $aCOFFMAN, C. B.
700 1 $aSTARR, J. L.
700 1 $aPALTINEANU, I. C.
700 1 $aLU, Y. C.
700 1 $aWATKINS, B. K.
773 $tAmerican Journal of Alternative Agriculture, Greenbelt$gv.15, n.2, p.79-87, 2000.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Agrobiologia (CNPAB) |
|
