| [Image: Fertilizer Recommendations being discussed at Field Day 2007 at the Sugar Research Station, St. Gabriel, LA.] |
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Fertilizer and lime costs continue to be two of the largest direct costs incurred in producing sugarcane. As you know, with the high price for oil and gas, so goes the price of nitrogen fertilizer. It is my understanding that phosphorus fertilizer is also at very high prices. To maximize the return on fertilizer investment and ensure minimal environmental damage, it is necessary to follow sound, research-backed guidelines. Our data have shown that LCP 85-384 as well as the newer varieties Ho 95-988, HoCP 96-540, L 97-128 and the Florida variety CP 89-2143 do not require the high levels of nitrogen fertilizer we once used for maximum production of sugar per acre. It appears that with higher nitrogen rates, sugarcane tends to lodge, affecting cane tonnage, maturity and harvestability. Preliminary results this past year also indicate that we might be applying higher levels of phosphorous than are actually required for maximum yields.
To maximize returns from your fertilizer dollar, consider these four points:
- What nutrients are needed?
- How much of each nutrient is needed?
- What source of fertilizer should be used?
- How and when should they be applied?
The recommended time for nitrogen application is April 1 – 30, but it can be applied in May as well. Applying nitrogen fertilizer prior to April 1 has the potential for being lost to leaching and denitrification and can stimulate early weed growth.
A complete soil fertility program is essential for maximum sugarcane yields and profits. Use soil tests properly. Know the lime and fertilizer requirements for each field on which you grow sugarcane and apply the plant nutrients according to the recommendations and soil test results. Avoid unproven and “miracle” products. Producers will harvest better yields and make more profit if they follow the recommendations.
Please see related file for 2007 Fertilizer Recommendations below. Do not hesitate to contact me if you should have any questions or comments.
Contact Information:
Benjamin L. Legendre, Ph.D.
Sugarcane Specialist (Statewide) & Professor
LSU Ag Center Research & Extension
St. Gabriel Research Station
5755 LSU Ag Road
St. Gabriel, LA 70776
Phone: (225) 642-0224
Fax: (225) 642-5339
E-mail: blegendre@agcenter.lsu.edu