Effect of high residual sodium carbonat (RSC) water and amendments on soil properties under rice-mustard (Brassica juncea ‘Khanpur Raya’) rotation

english

2025

volume 121, issue 2

guar   gypsum   mustard   residual sodium carbonate   rice   salinity   sodic water   sulfuric acid

Univerza v Ljubljani, Biotehniška fakulteta
(Obvezni izvod spletne publikacije)

A trial was designed to study the deleterious ef-fect of high RSC water on soil properties under rice-mustard crop rotation. Treatments included were; T1: high RSC water, T2: gypsum on the basis of RSC of water, T3: H2SO4 on the basis of RSC of water, T4: green manuring with guar, T5: farm yard manure (FYM) at the rate of 10 t. ha-1. For irrigation tube well water having (electrical conductivity (EC) 1.37 dS m-1, sodium adsorption ratio (SAR) 8.40 (mmol l-1)1/2 and RSC 7.85 me l-1) was used. The results revealed that lowest paddy (2.22 t ha-1) and grain yield (1.00 t ha-1) of rice and mustard were recorded when irrigated with high RSC water. In case of soil analysis, long-term use of high RSC water induces secondary salinity by increasing pH (1.92 %), EC (5.73 %) and SAR (35.71 %) over their initial values. Harmful effects of high RSC water were thwarted by all the treatments; however, positive effects of gyp-sum were more visible that increased crop growth and grain yield of rice-mustard crops by promoting soil properties. Gyp-sum recorded the highest paddy and grain yield (3.66 t ha-1, 1.70 t ha-1) of rice and mustard crop and decreased soil pHs(4.98 %), ECe (29.93 %) and SAR (54.54 %) over their initial values.

19.01.2026