Vol. 11, Special Issue 10 (2022)

Author(s):
Dipti Bhagat, Dr. Rakesh Banwasi, Dr. LK Srivastava and Ruparna Ratre

Abstract:
A field experiment was carried out at Research Farm of College of Agriculture, Indira Gandhi Krishi Vishwavidyalaya, Raipur (C.G) during the kharif season of 2021. The trial was conducted in Inceptisol with aim to study the response of potassic mineral on the yield, nutrient uptake and nutrient use efficiency by rice (var. Rajeshwari). The experiment was consisting of ten treatments and three replications in a randomized block design (RBD). The treatments include one RDF (@ N 100, P₂O₅ 60 and K₂O 40 kg ha^-1) as common practice, one treatment of split dose of recommended potassium, one treatment of no (zero) potassium, one treatment of absolute control and six treatments of different doses of potassic mineral (@ 70-210 kg ha^-1) along with the RDF were given with the different schedule of application as per the treatments. In the experiment, combined potassic mineral (Schoenite + Syngenite) was applied. The results showed that application of different doses of potassic mineral (@ 70-210 kg ha^-1) along with the RDF non-significantly increased the grain yields of rice up to 0.62-5.76% as compared to treatment of 100% RDF (54.66 q ha^-1). In the different treatments, grain yield of rice was recorded 31.33-57.81 q ha^-1 whereas straw yield was recorded 39.02-74.57 q ha^-1. Similarly, the total uptake of nitrogen (50.4-85.7 kg ha^-1), phosphorous (10.0-17.9 kg ha^-1) and potassium (92.2-168.9 kg ha^-1) by rice plant were also not significantly influenced by the potassic mineral when applied with the RDF. Among the all treatments, significantly lowest yield and nutrients uptake were recorded with the treatment of absolute control where no fertilizer and no potassic mineral was applied. Efficiency of applied potassium nutrient was estimated highest with the 100% RDF (219.9%) whereas lowest efficiency 115.8% was recorded with the treatment of RDF + mineral-K @ 210 kg ha^-1.