Cumulative effect of sulfur and calcium on wheat growth and yield under saline-sodic soils
2013
Arshadullah, M. (National Agricultural Research Centre, Islamabad (Pakistan). Land Resources Research Inst.) | Hyder, S.I. (National Agricultural Research Centre, Islamabad (Pakistan). Land Resources Research Inst.) | Ali, A. (National Agricultural Research Centre, Islamabad (Pakistan). Land Resources Research Inst.) | Mahmood, I.A.
A field experiment was carried out to investigate the effect of three rates of gypsum on growth and ionic concentration of wheat variety (Saher) sown in saline-sodic soil (ECe=5.32 dS m-1, pH=8.52 and SAR=18.87) at Soil Salinity Research Institute (SSRI) Farm, Pindi Bhattian during rabi 2009-10. Treatments were arranged using randomized complete block design (RCBD) with three replications. The crop was harvested at maturity, data on tillering, plant height, spike length, number of grains per spike, 1000-grain weight, straw and paddy yields were recorded. Potassium (K), Na, Ca, S and Mg concentrations in grain were estimated using atomic absorption spectroscopy. Tillering, grains per spike, 1000-grain weight and paddy yield significantly (P less than or equal to 0.05) enhanced by increasing the rate of gypsum (CaSO4). The maximum 4 number of grains per spike (60), 1000-grain weight (47 g) and grain yield (4.01 t per ha) were recorded with CaSO4 application @ 150 kg per ha. Grain 4 yield was 43% more than control treatment. Positive correlations (r= 0.96), (r=0.96) and (r=0.91) between Ca2+, K+, S and negative correlation r= (-0.99) between Na+ contents in grain and wheat grain yield, respectively. It indicates presence of significantly higher Ca2+, K+ contents in grain receiving CaSO4 help plants to attain more Ca2+, K+ and S to avoid Na+ uptake.
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