Effect of organic manure and zero budget technique on soil fertility and productivity of sugarcane plant and ratoon crop

A field experiment was conducted on clay loam soils at Regional Research Station, Chaudhary Charan Singh Haryana Agricultural University, Karnal, Haryana for three year (2018-2021) to investigate the effect of different organic treatments such as farmyard manure (FYM), bio fertilizers (BF) and green manuring (GM) with Sesbania or trash mulching (TM) on sugarcane yield, quality and soil fertility status. Cane length, cane girth, number of millable canes and commercial soluble sugar percent increased with the application of FYM, BF and GM/TM as compared to zero budget technique. The treatment that received 30 t FYM ha-1 +BF+GM/TM+ integrated pest management (IPM) recorded 15.8 and 12.3 % increase in cane yield over zero budget technique in plant and ratoon crops, respectively. Both in plant and ratoon crop, higher available nitrogen (145.7 and 147.8 kg ha-1), phosphorus (18.57 and 18.43 kg ha-1) and potassium (406.8 and 412.8 kg ha-1) were recorded where 30 t FYM ha-1 was applied along with BF+GM/TM+IPM. The application of 30 t FYM ha-1+BF+GM/TM+ IPM was found at par with treatment 20 t FYM ha-1+BF+GM+IPM for plant crop and 25 t FYM ha-1+BF+TM + IPM for ratoon crop. The treatment 20 or 25 t FYM ha-1 + BF + GM/TM + IPM were at par with the RDF treatment. The cane yield and juice quality obtained as a result of application of 20t FYM ha-1 + BF+GM+IPM for sugarcane plant crop and 25t FYM ha-1 +BF+TM+IPM for sugarcane ratoon crop was comparable with that of RDF.