100622 Trend of Soil and Leaf Potassium Content of Sugarcane: Impact of Soil Type, Fertilizer Source and Application Timing.
Poster Number 125-522
See more from this Division: SSSA Division: Soil Fertility and Plant Nutrition
See more from this Session: S4/S8 M.S. Poster Competition
Monday, November 7, 2016
Phoenix Convention Center North, Exhibit Hall CDE
Abstract:
Increasing fertilizer use efficiency can be achieved by matching nutrient supply with plants’ demand and maintaining nutrient availability throughout their critical growth stages. A field experiment was established in 2015 at LSU AgCenter Sugar Research Station in St. Gabriel, Louisiana to monitor the changes in soil and leaf K at different critical growth stages of sugarcane (Saccharum officinarum) grown on a light and heavy-texture soil. The experiment was set at two different sites with a total of 18 treatments, arranged in randomized complete block design on a Sharkey clay and complete randomize design on a Commerce silt loam soil with four replications. For this study, data were collected from selected plots only: control, and those treated with 90 Kg K ha-1 as muriate of potash (MOP, 60% K) and 45 Kg K ha-1 as MOP + 45 Kg K ha-1 as a controlled release polymer coated K (Agrocote KCl®, 51%) for both application timing (March and April). Sixteen cores soil samples were collected every two weeks (following March application) from each treatment plot at two depths (0 -15 and 15 - 30 cm) in both sites, oven dried at 60oC for three days, processed and analyzed for K using Mehlich-3 procedure. Four weeks later (following March application), eighteen leaf samples were collected from each treatment plot every two weeks, oven dried at 60oC, processed and digested using HNO3-H2O2 digestion procedure followed by ICP spectrophotometry for total K.
See more from this Division: SSSA Division: Soil Fertility and Plant Nutrition
See more from this Session: S4/S8 M.S. Poster Competition