CARBOHYDRATES PARTITIONING AND LIGHT USE EFFICIENCY OF SWEET SORGHUM Herniwati 1,2), Eko Widaryanto1), Budi Waluyo1), Karuniawan Puji Wicaksono1) and Marcia Pabendon3)
1) Departement of Agronomy, Faculty of Agriculture, Brawijaya University, Malang, East Java, Indonesia
2) South Sulawesi Assessment Institute for Agriculture Technology, Indonesian Agency for Agricultural Research and Development, Makassar, Indonesia
3) Indonesian Cereal Crop Research Institute, Indonesian Agency for Agricultural Research and Development, Maros, Indonesia
Abstract
The carbohydrates partitioning was developed based on plant growth stage. The determining factor for biomass production based on energy interception in the photosynthesis process is light use efficiency (LUE). The resulting mass flow of photosynthetic energy is allocated to plant organs. The research was conducted at Agro Science Park,Indonesia Cereal Research Institute, Maros from August to Desember 2019. The experiment was designed according to a randomizeblock design with tree replications. There were 10 accessions of sweet sorghum and 2 varieties as control. The value of light use efficiency is 1.39- 1,41 g MJ-1. The partition from the planting to the emergence stage (0 ≤- s ≤- 0.25) was 0.19 x s/0.25 root, 0 stem, 0.19 xs/0.25 leaves, and 0 panicle. The partition from the emergence to the maximum vegetative stage (0.25 < s ≤- 0.5) was 0.79-(0.62x s/0.5) root, 0.14 x s/0.5 stem, 0.19 + (0.45 x s/0.5) leaves, and 0 panicle. The partition from the maximum vegetative stage to the flowering stage (0.5 < s ≤- 0.75) was 0.24 - (0.09 x s/0.75) root, 0.12+ (0.39 x s/0.75) stem, 0.64 - (0.46 x s/0.75)leaves, and 0.16 x s/0.75 panicle. The partition from flowering to the harvest stage (0.75 < s ≤- 1) was 0.11 - (0.15 x s) root,0.55 - (0.53x s) stem, 0.16-(0.19 x s) leaves, and 0.18 + (0.82 x s) panicle.
Keywords: carbohydrates partitioning,light use efficiency, sweet sorgum
