Abstract
A field experiment was conducted for two years to study the effect of crop residue and Phosphorus management on the growth and yield of direct dry seeded rice cultivation system on farmer’s field in village Dhakki, Dera Ismail Khan (KPK) Pakistan during Kharif seasons, 2011 and 2012. Treatments were assigned randomly using Randomized Complete Block Design (RCBD) having three replications. The net plot size was 2.5 x 5m (12.5m2 ) with 10 rows. IR-6 was used as test variety of rice. Treatments were T1 = wheat straw @ 5 t. ha-1 alone, T2 = wheat straw @ 5 t. ha-1 + P2O5 @ 30 Kg .ha-1 , T3 = wheat straw @ 5 t. ha-1 + P2O5 @ 60 Kg. ha-1 and T4 = P2O5 @ 90 Kg. ha-1 alone. Effect of wheat residues/straw and different phosphorus levels showed significant variations for plant height (cm), productive tillers m-2 , number of grains panicle-1 , panicle length (cm),1000 grain weight (gm), biomass ( t ha-1 ) and that the treatment T2 (wheat straw @ 5 t. ha-1 + P2O5 @ 30 Kg. ha-1 ) performed the best and gave the maximum rice yield of 6.07 t. ha-1 . It was concluded that selection of suitable cultivars, timely planting on loamy soil and accurate use of phosphorus with organic fertilizers, rates of fertilizer can be reduced by 50% thus sustaining the agriculture productivity and reducing environmental degradation.
