359-7 Cotton Yield, Fiber Quality, Water Use Efficiency, and Spectral Reflectance Responses to Irrigation and Tillage Management in the Texas Rolling Plains.

Poster Number 310

See more from this Division: ASA Section: Agronomic Production Systems
See more from this Session: Irrigation Strategies and Management
Wednesday, November 5, 2014
Long Beach Convention Center, Exhibit Hall ABC
Share |

Ahmed Attia, Texas A&M University, Vernon, TX, Nithya Rajan, P.O.Box 1658, Texas A&M University, College Station, TX, Glen Lorin Ritchie, 15th and Detroit, Texas Tech University, Lubbock, TX, Song Cui, Middle Tennessee State University, Murfreesboro, TN, Amir M.H. Ibrahim, Department of Soil and Crop Sciences, Texas A&M University, College Station, TX, Dirk Hays, Texas A&M University, Texas A&M University, College Station, TX and Qingwu Xue, Texas Agrilife Research-Amarillo, Amarillo, TX
Poster Presentation
  • Ahmed_ASA_Long Beach2_2014.pdf (3.0 MB)
  • In the semi-arid Texas Rolling Plains, the growth and yield of cotton (Gossypium hirsutum L.) is driven by the amount of water available to the crop through irrigation and precipitation.  A field study was conducted in 2012 and 2013 at Chillicothe, TX, to investigate the growth, yield, water use efficiency (WUE), and spectral reflectance responses of cotton under different irrigation and tillage treatments. A split-split plot design with three replications was used with irrigation as the main plot (dryland, 45% evapotranspiration replacement, 90% evapotranspiration replacement, and irrigation based on a remote sensing method developed by researchers in the current study), tillage (conventional and minimum) as sub plot, and varieties (PHY499, DP1044, PHY375, and FM9170) as sub-sub plot. Plant height, lint yield, WUE, and fiber quality were significantly affected by irrigation and irrigation by variety interaction. Increasing irrigation level resulted in a linear increase in lint yield and WUE. The irrigation by variety interaction showed that the 90% evapotranspiration (ET) replacement treatment involving PHY375 produced the greatest lint yield and WUE. Tillage did not significant affect lint yield, WUE, and fiber quality. Increasing irrigation water amounts resulted in a linear increase in fiber length and strength, and a linear decrease in fiber micronaire. Vegetation indices calculated using spectral reflectance measurements included the Normalized Difference Vegetation Index (NDVI) and Normalized Difference Water Index (NDWI). In the current study, NDWI performed better than NDVI. We suggested further investigation on using NDWI for irrigation management for cotton in the Texas Rolling Plains.
    See more from this Division: ASA Section: Agronomic Production Systems
    See more from this Session: Irrigation Strategies and Management