Oryza sativa ssp. japonica var. 'Katy' - Rice

Oryza sativa ssp. japonica var. 'Katy' - Hybrid Rice - Poaceae

Oryza sativa ssp. japonica var. 'Katy' is a hybrid rice developed by Dr. Karen Moldenhaur at the University of Arkansas. We have been growing this rice for Dr. Scott Russell's research for the past 3 years. Domesticated rice comprises 2 species Oryza sativa being native to tropical Asia and Oryza glaberrima, native to Africa. The plants will reach about 6 feet (1.82 m) tall in containers and are monocarpic annuals. Slender leaves will be anywhere from 19-39 inches (50-100 cm) long. The plants are fairly easy to grow, but one needs to watch nutrient levels carefully and water levels on the plants are critical.

Blooming: In the greenhouse, we have plants in different stages of development all year long. In nature, the plants bloom in late summer to early fall. The small flowers are produced in panicles, which are highly branched pendulous inflorescences.

Culture: Oryza sativa ssp. japonica var. 'Katy' needs full sun with a rich wet soil mix. In the greenhouse, we use a soil mix consisting of 2 parts peat moss to 1 part loam to 1 part sand. To this mix we add 1 cup of ground limestone to adjust the pH. We also add 1 tablespoon of Micromax micronutrients and 1 cup of 14-14-14 Osmocote to each 0.01 cu yard of mix. The seeds are planted in the mix, about 20 seeds per 6 inch pot. These are kept moist and when the plants are 3 weeks old they are transplanted to 5 gallon buckets without drain holes. After 2 weeks in the buckets we start to flood the plants. The water level is brought up to about 6-10 inches above the soil level. We supplement the fertilizer with a balanced fertilizer once during the season. If nutrient levels are good in the soil then there are few problems with growing the plants. The plants are sensitive to mite infestations and to fertilizer adjustments. Plants can become chlorotic if the nutrient levels fall.

Propagation: Oryza sativa ssp. japonica var. 'Katy' is best propagated from seed. Seed will germinate in 7-14 days.

Oryza sativa ssp. japonica var. 'Katy' was featured as Plant of the Week August 24-30, 2007.

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Cal's Plant of the Week was provided as a service by the University of Oklahoma Department of Microbiology & Plant Biology and specifically the late Cal Lemke, who used to be OU's botany greenhouse grower and an avid gardener at home as well. If the above links don't work, then try the overview site. You may also like to look at the thumbnail index. ©1998-2017 All rights reserved.