Rice productivity and soil health as affected by wheat residue incorporation along with nitrogen starter dose under salt-affected soil
2012
Ali, A. (National Agricultural Research Centre, Islamabad (Pakistan). Land Resources Research Inst.) | 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.) | Mahmood, I.A. | Badar-uz-Zaman
A field experiment was conducted to determine the effect of wheat straw incorporation @ 5 t per ha along with different N starter doses (0, 30, 60 and 90 kg N per ha) on rice (Supper basmati) production and soil health at MK Farm, Farooqabad, district Sheikhupura under saline sodic soil (ECe=5.65 dS m-1, pH=8.57and SAR=19.38) during 2010. Treatments were arranged in 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. Plant samples collected at maturity were analyzed for K, Ca and Na concentration in grain and straw. Tillering, grains per spike, 1000-grain weight and paddy yield significantly (P less than or equal to 0.05) increased with different levels of N doses. Maximum tillers per plant (27.66), plant height (138.33 cm), spike length (28.33 cm), and grains per spike (175), 1000-grain weight (28.66 g) and paddy yield (4.25 t per ha) was harvested with 5 t per ha wheat straw incorporation plus 60 kg N per ha. The paddy yield was 19% more than control treatment. Positive correlations (r= 0.74) and (r=0.73) between Ca2+ and K+ contents in grain and its yield were calculated. However negative correlation (-0.85) between Na+ content in grain and paddy yield was noticed. Data indicates presence of significantly higher Ca2+ and K+ contents in grain receiving wheat straw incorporation along with N starter dose (30 kg per ha). Economical analysis showed that maximum value cost ratio (4.1:1) was determined with incorporation of 5 t per ha wheat straw plus 60 kg N per ha.
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