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Impact of Forage Fertilization with Urea and Composted Cattle Manure on Soil Fertility in Sandy Soils of South-Central Vietnam


Affiliations
1 Department of Animal Science, Cornell University, 149 Morrison Hall, Ithaca, NY 14853, United States
2 Department of Animal Science, Cornell Nutrient Management Spear Program, Cornell University, 323 Morrison Hall, Ithaca, NY 14853, United States
3 School of Land and Food, University of Tasmania, Private Bag 98,Hobart, TAS 7001, Australia
4 Hue University of Agriculture and Forestry, 102 Phung Hung Street, Hue, Viet Nam
5 Department of Supply Chain and Information Systems,The Pennsylvania State University, 467 Business Building, University Park, PA 16802, United States
6 Department of Animal Science, Cornell University, 329 Morrison Hall, Ithaca, NY 14853, United States
 

Increased production in smallholder beef systems requires improved forage management. Our objective was to evaluate the effects of composted cattle manure and mineral nitrogen (urea) application on soil fertility and partial nutrient balances in plots established to Brachiaria cv. Mulato II in south-central coastal Vietnam from 2010 to 2013. A randomized complete block design was implemented on six farms (blocks), with five rates of composted cattlemanure (0, 4, 8, 12, and 24MgDM/ha per yr) and three urea rates (0, 60, and 120 kgN/ha per yr) in a factorial design. Soil was analyzed before and after the experiment. Compost increased soil pH, organic matter, Ca, Mg, and Mn. The effect of compost and urea applications on postexperiment soil fertility depended on preexperiment soil fertility for K, P, S, Mg, Zn, Mn, Cu, and organic matter, suggesting that the ability to maintain soil fertility depends on the interaction between soil organic and inorganic amendments and existing soil fertility. Highest farm yields were also achieved on farms with higher preexperiment soil fertility levels. Negative partial nutrient balances for N, P, and K suggest that yields will not be sustainable over time even for the highest fertilization inputs used in this experiment.
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  • Impact of Forage Fertilization with Urea and Composted Cattle Manure on Soil Fertility in Sandy Soils of South-Central Vietnam

Abstract Views: 95  |  PDF Views: 0

Authors

Keenan C. McRoberts
Department of Animal Science, Cornell University, 149 Morrison Hall, Ithaca, NY 14853, United States
Quirine M. Ketterings
Department of Animal Science, Cornell Nutrient Management Spear Program, Cornell University, 323 Morrison Hall, Ithaca, NY 14853, United States
David Parsons
School of Land and Food, University of Tasmania, Private Bag 98,Hobart, TAS 7001, Australia
Tran Thanh Hai
Hue University of Agriculture and Forestry, 102 Phung Hung Street, Hue, Viet Nam
Nguyen Hai Quan
Hue University of Agriculture and Forestry, 102 Phung Hung Street, Hue, Viet Nam
Nguyen Xuan Ba
Hue University of Agriculture and Forestry, 102 Phung Hung Street, Hue, Viet Nam
Charles F. Nicholson
Department of Supply Chain and Information Systems,The Pennsylvania State University, 467 Business Building, University Park, PA 16802, United States
Debbie J. R. Cherney
Department of Animal Science, Cornell University, 329 Morrison Hall, Ithaca, NY 14853, United States

Abstract


Increased production in smallholder beef systems requires improved forage management. Our objective was to evaluate the effects of composted cattle manure and mineral nitrogen (urea) application on soil fertility and partial nutrient balances in plots established to Brachiaria cv. Mulato II in south-central coastal Vietnam from 2010 to 2013. A randomized complete block design was implemented on six farms (blocks), with five rates of composted cattlemanure (0, 4, 8, 12, and 24MgDM/ha per yr) and three urea rates (0, 60, and 120 kgN/ha per yr) in a factorial design. Soil was analyzed before and after the experiment. Compost increased soil pH, organic matter, Ca, Mg, and Mn. The effect of compost and urea applications on postexperiment soil fertility depended on preexperiment soil fertility for K, P, S, Mg, Zn, Mn, Cu, and organic matter, suggesting that the ability to maintain soil fertility depends on the interaction between soil organic and inorganic amendments and existing soil fertility. Highest farm yields were also achieved on farms with higher preexperiment soil fertility levels. Negative partial nutrient balances for N, P, and K suggest that yields will not be sustainable over time even for the highest fertilization inputs used in this experiment.