Row rice system gains interest in Louisiana

• By Karol Osborne •

dennis burns, row rice

LSU AgCenter extension agent Dennis Burns talks about adding fertilizer to irrigation water, a process called fertigation, during the LSU AgCenter Northeast Research Station row rice and soybean field tour in St. Joseph — photo by Karol Osborne/LSU AgCenter

More than 50 agricultural producers and industry representatives interested in furrow-irrigated rice, also called row rice or upland rice, attended the LSU AgCenter Northeast Research Station row rice and soybean field tour on July 9 in St. Joseph.

“We are set up for cotton, corn and beans, and if there is an opportunity to diversify that makes sense, I’m interested in it,” said Tensas Parish farmer Kellon Lee.

AgCenter station coordinator Donnie Miller said the evening field day introduced a new format for showcasing many of the station’s ongoing research projects.

“This field tour represents an integrated program design with presentations from research scientists, extension agents and grower experience,” said AgCenter regional director Melissa Cater.

Tensas Parish farmer Donnie VandeVen spoke to the group about differences between conventional rice and row rice production systems.

VandeVen, who has farmed traditional rice for 12 years and row rice for five years, said row rice is a good option for first-time rice growers to gain experience because it does not require a long-term commitment.

“There is no one here who can’t do it and be successful at it. You just need a plan up front,” he said.

Fertility a work in progress

Heavy dependence on aerial applications can result in significantly higher fertilizer costs in row rice production, VandeVen said.

“With row rice, we’ve learned you need to spoon feed it — I’m talking five applications at 60 to 80 pounds each time — which is not much more fertilizer but a heck of an airplane bill,” he said.

AgCenter agronomist Josh Copes said results from a rice fertigation project that adds fertilizer to irrigation water on the station is not without challenges but may prove to be beneficial in cost savings in the long run.

“Not only do we have to get the nitrogen evenly out of the pipe, we have to get it evenly dispersed down the furrow. Then we have to get the nitrogen to move through the center of the field in this flatbed system,” Copes said.

AgCenter extension agent Dennis Burns said the project explores ways to minimize nitrogen loss in row rice production.

“A mix of nitrogen fertilizer and water at a ratio of one-to-one applied to a wet field has been important,” he said.

”It is a work in progress,” said AgCenter extension agent R.L. Frazier, adding that fields are watered just like a cotton, soybean or corn crop.

Weed control is more problematic in row rice production with grass species being the biggest concern, Copes said.

“Use soil residual herbicides as often as possible,” Copes said, “There are too many opportunities after wetting and drying for germination to occur.”

Disease management

Producers should select rice varieties resistant to rice blast, a disease that can affect any part of the plant and cause serious damage, said AgCenter plant pathologist Trey Price.

“There is a tight window when you can try to control the disease,” Price said, adding that fungicide management for rice blast is similar to a wheat scab fungicide application.

Because rice blast will overwinter in crop residue, crop rotation plays an important role, Price said, adding that producers in the northeastern part of the state have more options than rice growers in south Louisiana.

A soybean rotation can increase the incidence of sheath blight in rice and may not be the best plan, Price said. But corn, cotton or other crops well-suited for the ground where rice is planted could be considered.

A robust seed treatment will help control both rice water weevil and grape colaspis if rice is rotated with soybeans, said AgCenter entomologist Sebe Brown.

“We see economic returns consistently where we see a seed treatment versus where there is none,” Brown said.

Arkansas is currently fighting the rice billbug, an insect that cannot survive in an aquatic environment and is typically found on levees in rice fields.

“We are farming a rice system that is not saturated or under permanent flood conditions, which offers a prime opportunity for billbugs to come in and start damaging rice,” Brown said, urging producers to notify the AgCenter if any billbugs are spotted in their fields.

Other presentations from the field tour included:

— Soybean weed control by AgCenter weed scientist and station coordinator Donnie Miller.

— Corn update by AgCenter corn specialist Rick Mascagni.

— Summer and fall cover crops by AgCenter agronomist James Hendrix.

Karol Osborne is communications coordinator at the LSU AgCenter. She may be reached at KOsborne@agcenter.lsu.edu.