Transforming Agriculture, Perennially
Donate

Perennial Rice

In the subtropical Yunnan Province of China, high-yielding perennial rice has been successfully developed. In 2021, perennial rice was grown on 15,333 ha by 44,752 smallholder farmers in southern China and is now expanding throughout SE Asia and Africa.

PR23 and a number of other selections were developed through a wide hybrid cross between annual, cultivated rice, Oryza sativa, and a perennial cousin of rice from Africa, Oryza longistaminata.  This wide hybridization approach is the same one being employed by breeders at The Land Institute to perennialize sorghum and wheat.


Why Perennial Rice?

  • Rice feeds 4 billion people and is the grain most consumed by humans. It’s the third largest cereal grain crop after corn and wheat worldwide in metric tons.
  • Rice production is a very labor-intensive activity for farmers, and perennial rice would greatly reduce these labor inputs. 2022 research shows that farmers used nearly 60% less labor and spent almost 50% less on seed, fertilizer, and other inputs for perennial rice than annual rice.
  • High-yielding perennial rice produced grain for eight consecutive harvests over four years from a single planting, with average perennial rice yields equivalent to annual rice, with 6.8 Mg ha-1 harvest-1 of perennial rice versus 6.7 Mg ha-1 harvest-1 of replanted annual rice for each perennial rice regrowth cycle.
  • By switching from annual to perennial rice, soils accumulated almost a ton of organic carbon per hectare per year, 0.81 Mg organic carbon ha-1 yr-1
  • Farmer profits from perennial rice ranged from 17% to 161% above annual rice

Related Content

In May of 2019, The Land Institute teamed up with colleagues at Lund University in…

Read More about 2019 Perennial Grain International Research Meeting

August 2019   Dear Friends, The grid steadily unrolled beneath my window. Over eastern Arkansas,…

Read More about President’s Letter 2019

Related Scientific Publications

Efforts to domesticate new, high-yield, perennial grain crops require patience and persistence—but such plants could…

Read More

Perennial versions of our major grain crops would address many of the environmental limitations of…

Read More
Share On: Share on Facebook Share on Twitter Select other ways to share