Managing Global Resources for a Secure Future

2017 Annual Meeting | Oct. 22-25 | Tampa, FL

107133 Evaluating the Impacts of Humic Acid Applied with Nitrogen Fertilizer on Corn Growth and Soil Quality in South Dakota.

Poster Number 931

See more from this Division: SSSA Division: Nutrient Management and Soil and Plant Analysis
See more from this Session: Nutrient Management and Soil and Plant Analysis General Poster

Monday, October 23, 2017
Tampa Convention Center, East Exhibit Hall

Liming Lai, Department of Agronomy, Horticulture, and Plant Science, Extension Service - SDSU, Brookings, SD, Sandeep Kumar, South Dakota State University, Brookings, SD and Gregory L. Willoughby, Helena Chemical Co., Lafayette, IN
Poster Presentation
  • Poster_Helena_Lai.pdf (287.0 kB)
  • Abstract:
    ABSTRACT

    The integration of inorganic fertilizers with Humic Acid (HA) may be an effective way to improve crop yields and maintain soil health. However, little is known about the evaluation of HA applied with nitrogen (N) fertilizer on corn (Zea mays L.) growth and soil properties in South Dakota. The objectives were to evaluate the impacts of HA applied with N fertilizer on corn yield, corn stem height and diameter, and the selected soil properties. The experiment was a split-plot in a randomized complete block design with 4 replications at the SDSU Southeast Research Farm, near Beresford, South Dakota. The six fertilizer treatments were established in 2013 for evaluating corn yield. Another 12 fertilizer treatments were established in 2014 and 2015 for assessing corn growth, yield, and soils quality. The results showed that most treatments of the HA applied with N fertilizer significantly influenced corn yield and stem diameter and height. The treatments did not significantly impact wet aggregate stability (WAS), carbon to nitrogen (C: N) ratio, and bulk density (ρb) of soil. However, HA significantly impacted the soil pH, electrical conductivity (EC), soil organic matter (SOM), soil organic N (SON), and water soluble ammonia (NH3) in soils under some treatments. The findings indicate that the appropriate fertilization of HA applied with N fertilizer may increase corn yield and reduce the cost of fertilizer application, and improve soil quality.

    See more from this Division: SSSA Division: Nutrient Management and Soil and Plant Analysis
    See more from this Session: Nutrient Management and Soil and Plant Analysis General Poster