Performance of early and mid-late varieties of Sugarcane under Different Nitrogen Levels

A.Sireesha; T.Sreelatha; Ch.S.Ramalakshmi; T.Usha Rani

Volume : VIII, Issue : V, May - 2019

Performance of early and mid-late varieties of Sugarcane under Different Nitrogen Levels

A. Sireesha, T. Sreelatha, Ch. S. Ramalakshmi, T. Usha Rani

Abstract :

A field experiment was conducted with five levels of nitrogen (control (0% recommended dose of nitrogen), 75% RDN, 100% RDN,125%RDN and 150% RDN) applied in two splits at 45 and 90 days after planting using four prerelease genotypes (two early 2001A63 ; 2000A56 and two mid–late 98A163; 96A3) with three replications in factorial RBD. Cane yield and sugar yield were increased with increase in level of nitrogen. 2001A63 recorded significantly higher yield at 112 kg N/ha (81.5t/ha), which was at par with 140 kg N/ha (84.1t/ha) and 168 kg N/ha (86.8 t/ha).Varieties 98A163 and 2000A56 recorded significantly higher yield (85.8t/ha and 76.75t/ha respectively) at 140 kg N/ha RDN level, which was at par with 168 kg N/ha (86.2t/ha & 81.8t/ha).96A3 recorded significantly higher yield at 168 kg N/ha RDN (77.7t/ha). Cane and sugar yield in ratoon crop also followed the similar trend, increase in nitrogen level increased the cane and sugar yields. Juice quality parameters were found to be higher in ratoon crop as compared to the plant crop. Sucrose in ratoon was higher with the early variety 2001A63 (17.78 %) followed by mid–late variety 98A163 (17.52 %).