Evaluation of the regularity of energy formation of sweet sorghum in saline-alkali soils

To determine the quality of sweet sorghum energy in saline-alkali soil, and to select the appropriate growth for the area and higher quality energy varieties, a field test was conducted to evaluate the agronomic traits and physiological indexes of sweet sorghum related to the comprehensive evaluation of five different genotypes of sweet sorghum grown in cracking alkali soil. The results showed that under the condition of cracking alkali soil, soluble sugar content and sugar yield of stems of different varieties of sweet sorghum increased with growth, during which the accumulation of large amounts of sugar occurred during the first 20 days after flowering. Soluble sugar content and sugar yield were higher in ZNH18 and ZNH07, followed by ZNH12, and were lowest in ZNH05 and CT-2. Stalk cellulose and hemicellulose content and yield in the genotypes of sweet sorghum decreased with growth. Lignin and yield showed an increasing trend; however, Ligno cellulose content of each component showed some advantages in ZNH18 and ZNH07. In addition, in cracking alkali soil, ZNH18 and ZNH07 could obtain higher grain and biological yield. Therefore, sweet sorghum ZNH18 and ZNH07 could better adapt to cracking alkali soil, with higher sugar, biological, and fibre yield. As such, these are excellent genotypes that are suitable for planting in this environment.