TY - GEN
T1 - Response of Corn for Silage to Water in a Semi-Arid Environment
AU - Nilahyane, Abdelaziz
AU - Islam, M. Anowarul
AU - Mesbah, Abdel O.
AU - Garcia y Garcia, Axel
PY - 2016
Y1 - 2016
N2 - Understanding crop response to water is important for improving agricultural water use efficiency (WUE) and maximizing yield in the semi-arid regions, where water resources are limited. Two experiments were conducted during 2014 and 2015 growing seasons for determining the effect of water stress on growth, water use, water productivity (WP), and dry matter yield of corn for silage grown under on-surface drip irrigation (ODI) and sub-surface drip irrigation (SDI) in the Big Horn Basin of Wyoming, USA. The experiments were laid out as a randomized complete block design with three replications for the ODI and four replications for the SDI. Three irrigation strategies based on the crop evapotranspiration (ETc) were used: 100% or full irrigation (100ETc), 80% (80ETc), and 60% (60ETc). Dry matter yield was measured five times during the growing seasons. Water productivity was derived as the ratio of dry matter yield to water used to produce that yield. Soil water status was determined using a neutron probe during the growing seasons. Results showed that irrigation deficit decreased the dry matter yield. In both experiments, the seasonal water use under 100ETc was 254 mm and 223 mm in 2014 and 2015, respectively. In ODI, WP at harvest varied between 7.1 kg m-3 to 7.7 kg m-3 between 7.46 kg m-3 to 9.16 kg m-3 under the SDI system. In both experiments, the ETc from the field water balance and the ETc derived from the Penman-Monteith equation were correlated (r = 0.9 for ODI and r = 0.94 for SDI) indicating that the water balance was acceptable. Water productivity of corn for silage grown in the Big Horn Basin of Wyoming was not affected by the irrigation method used. At late vegetative growth stages, water stress has a great effect on growth and DM yield of corn for silage. The neutron probe is a useful tool for water balance and irrigation management.
AB - Understanding crop response to water is important for improving agricultural water use efficiency (WUE) and maximizing yield in the semi-arid regions, where water resources are limited. Two experiments were conducted during 2014 and 2015 growing seasons for determining the effect of water stress on growth, water use, water productivity (WP), and dry matter yield of corn for silage grown under on-surface drip irrigation (ODI) and sub-surface drip irrigation (SDI) in the Big Horn Basin of Wyoming, USA. The experiments were laid out as a randomized complete block design with three replications for the ODI and four replications for the SDI. Three irrigation strategies based on the crop evapotranspiration (ETc) were used: 100% or full irrigation (100ETc), 80% (80ETc), and 60% (60ETc). Dry matter yield was measured five times during the growing seasons. Water productivity was derived as the ratio of dry matter yield to water used to produce that yield. Soil water status was determined using a neutron probe during the growing seasons. Results showed that irrigation deficit decreased the dry matter yield. In both experiments, the seasonal water use under 100ETc was 254 mm and 223 mm in 2014 and 2015, respectively. In ODI, WP at harvest varied between 7.1 kg m-3 to 7.7 kg m-3 between 7.46 kg m-3 to 9.16 kg m-3 under the SDI system. In both experiments, the ETc from the field water balance and the ETc derived from the Penman-Monteith equation were correlated (r = 0.9 for ODI and r = 0.94 for SDI) indicating that the water balance was acceptable. Water productivity of corn for silage grown in the Big Horn Basin of Wyoming was not affected by the irrigation method used. At late vegetative growth stages, water stress has a great effect on growth and DM yield of corn for silage. The neutron probe is a useful tool for water balance and irrigation management.
KW - Corn for silage
KW - Irrigation
KW - Water productivity
UR - http://www.scopus.com/inward/record.url?scp=85009072351&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85009072351&partnerID=8YFLogxK
U2 - 10.13031/aim.20162460822
DO - 10.13031/aim.20162460822
M3 - Conference contribution
AN - SCOPUS:85009072351
T3 - 2016 American Society of Agricultural and Biological Engineers Annual International Meeting, ASABE 2016
BT - 2016 American Society of Agricultural and Biological Engineers Annual International Meeting, ASABE 2016
PB - American Society of Agricultural and Biological Engineers
T2 - 2016 ASABE Annual International Meeting
Y2 - 17 July 2016 through 20 July 2016
ER -