Sweet Sorghum

  • 24 May 2024

Why is it in the News?

Governments should be using their agriculture extension services to raise awareness among farmers, and consumers about the benefits & practical applications of sweet sorghum in people’s diet.

About Sweet Sorghum:

  • Sweet sorghum is the most important millet crop occupying the largest area among the cereals next to rice.
  • It is mainly grown for its grain and fodder.
  • Alternative uses of sorghum include commercial utilization of grain in the food industry and utilization of stalk for the production of value-added products like ethanol, syrup jaggery and enriched bagasse as fodder and as a base material for cogeneration.
  • Sweet sorghum has emerged as a supplementary crop to sugarcane in dry land pockets for the production of ethanol.
  • The success rate is high because of the use of existing machinery available in the sugar factories and attached distilleries.
  • The advantages of the crop are it can be grown with limited water and minimal inputs and it can be harvested in four months.

Climate and Soil:

  • Sweet sorghum can be sown in June with the southwest monsoon, in September-October with the northeast monsoon (500-600 mm rainfall), or in summer with assured irrigation.
  • The crop prefers moderate rainfall; excessive moisture or heavy rain after flowering can reduce sugar content.
  • With irrigation, early sowing before June can prevent issues with heavy rains during flowering and grain maturation.
  • Summer sowing may result in lower biomass and sugar yield. Sweet sorghum thrives in well-drained soils of medium depth (18" and above), with water requirements varying by soil type (red, black, laterite, and loamy).

Multiple Uses of Sweet Sorghum:

  • Sweet sorghum is a versatile crop used for grain, animal feed, and sugary juice.
  • Its grains are made into steamed bread, porridge, and beer, providing high nutritional value with proteins, carbohydrates, fibre, and essential minerals like potassium, calcium, sodium, and iron.
  • Resilient in arid climates, sweet sorghum produces significant biomass, which, along with grains, serves as high-quality animal feed.
    • The sugary juice from its stalks is used for bioethanol production, yielding more ethanol per hectare than maize, second only to sugarcane.
  • Notably, sweet sorghum is drought-resistant, capable of dormancy during dry periods and resuming growth later.
  • Its tolerance to low water, nitrogen inputs, salinity, and drought stress makes it ideal for arid regions, making it popular in the US, Brazil, and China.