Effect of saline irrigation water on the leachability of salts, growth and chemical composition of wheat (Triticum aestivum L.) in saline-sodic soil supplemented with phosphorus and potassium

Abstract

Salinity-fertility interaction has not been properly explored especially in saline-sodic soils. Therefore, the current study investigated the response of wheat (Triticum aestivum L.) to saline irrigation water in salinesodic soil supplemented with potassium (K) and phosphorus (P). Wheat was grown in pots filled with salinesodic soil which were irrigated either with normal or saline water. Potassium and P fertilizers were applied at two levels. Results indicated that growth of wheat plants was impaired by saline irrigation resulting in a decreased grain and dry matter yield. The P application had significant effect on the dry matter yield and other yield components. Potassium application significantly increased dry matter yield and root mass. Wheat yield increased by 14 and 7% with the application of 150 kg K 2 O ha -1 and 120 kg P 2 O 5 ha -1 over the control soil under saline irrigation. The higher yield was obtained with combined P and K treatment under non-saline irrigation. The P addition significantly affected shoot and root [P] and [Na], [K] and [Mg] in the shoot tissue while the K:Na ratio produced non-significant effects under both irrigation waters. The addition of K significantly affected [Na], [K] and K:Na ratio in shoot. All other root parameters were significantly affected by the K addition. The Ca uptake by roots increased with saline irrigation. The P addition increased [P] in plant tissue. The Na uptake by root and shoot tissues was depressed with the addition of P and K fertilizers. The higher K uptake increased K:Na ratio in both shoot and root tissues. The values of EC, SAR and [P], [Na], [Ca], [Mg], [Cl] and ratios of Na:K, Ca:P, Cl:P and SO 4 :P in the soil leachates significantly increased with saline irrigation. The P addition had significant bearing on the soil pH, SAR, [P] Effect of saline irrigation water on the leachability of salts, growth and chemical composition that the addition of P and K under saline-sodic conditions may affect salts and nutrients dynamics of the soil and was useful for crop productivity.

Beneficial Role of MWCNTs and SNP on Growth, Physiological and Photosynthesis Performance of Barley under NaCl Stress

“…Salinity is one of the most important environmental stresses, which noticeably hinders crop productivity in many arid and semi-arid regions (Torbaghan et al, 2017). Low precipitation, high surface evaporation, poor cultural practices and irrigation with saline water are among the major contributors to the increasing salinity problems (Hussain et al, 2016). In general, a group of morphological, physiological and biochemical changes in the plant growth are caused by soil salinity.…”

Sustaining Yield of Winter Wheat under Alternate Irrigation Using Saline Water at Different Growth Stages: A Case Study in the North China Plain

“…The results revealed that the water quality affected crop harvest index when water was applied at the flowering stages (Table 6). Previous studies reported that saline water irrigation reduced water uptake efficiency, transpiration rate and net CO 2 assimilation due to these reductions, and in turn crop growth and nutrients transport into plant is affected [72][73][74][75]. Similarly, Poustini [76] reported that there was no effect of water quality having an EC 1:5 ranging between 3.5 and 6.9 dS m −1 on net assimilation rate.…”

Ameliorative Effects of Potassium on the Salinity Stress in Plants: A Review

“…Calcium and magnesium in root tissue were affected significantly by the phosphorus with potassium interactions. EC i x P w x potassium interaction didn't effect on all other parameters, except Mg in shoot and Ca and Mg in root tissue by [81].…”