Effects of Irrigation Scheduling and Nitrogen Levels on Soil Nutrient and Their Uptake in Radish (Raphanus Sativus L.) in Mid Hills of North-Western Himalayas, India

Abstract

ABSTRACT Irrigation and N are the main two limiting factors for the radish growth and soil nutrient pool. Inappropriate irrigation and nitrogen application can negatively affect the soil nutrient status and accelerate nutrient losses which can lead to ground water pollution and soil degradation. In this study, four irrigation schedules viz. I0 (no irrigation), I1-IW/CPE = 0.8, I2-IW/CPE = 1.0, I3-IW/CPE = 1.2 and three N levels i.e. N0 (no N application), N1 (75% RDN) and N2 (100% RDN) were evaluated and replicated thrice in a RBD (factorial) during 2016–17 and 2017–18 at experimental farm of Dr YSP University of Horticulture and Forestry Nauni, Solan (HP), on sandy loam soil. Results revealed that irrigation and nitrogen levels had a significant effect on soil nutrient contents and maximum available N, P contents were observed under N2I1, N0I0 respectively, while available K, Ca, Mg and sulfate sulfur were highest under N2I3. Nutrient uptake significantly enhanced with increase in irrigation and N levels due to their solubilility and mobility. Lowest values were recorded under control. Nitrogen use efficiency decreased with increase in nitrogen levels. Results of study could be highly supportive in selecting appropriate irrigation schedule (I3) and N (100% RDN) level for fertility and efficient management of scarce water resources.