LENTIL YIELD AND NODULATION IN RESPONSE TO FOLIAR S AND ZN COMBINED WITH NPK AND THEIR INTERACTION WITH FARMYARD MANURE
Keywords:farmyard manure, foliar application, inorganic nutrients, lentil, nodulation, nodules weight
Re-assessment of NPK recommendations as sole and mixed with other nutrients is necessary today because soil exhaustion continues with intensive cultivation. In line with, a study was carried out to assess the impact of mineral NPK with foliar S and Zn on lentil crop both in the presence and absence and farmyard manure (FYM) at the Agriculture Research Institute, Mingora, Swat during 2012. Using Randomized Complete Block Split Plot Design, FYM was allotted to main plots (-FYM and +FYM (10 t ha-1)) whilst NPK (kg ha-1) and S and Zn (% solution) applied as; Control, NP (30:60), NPK (30:60:60), NPKS (NPK+3%S), NPKZn (NPK+3%Zn) and NPKSZn (NPK+S+Zn) were tested in sub plots. Combined NPK, S and Zn application (NPKSZn) improved the nodule number (NN) and nodule weight (NW) plant-1 significantly (by 22 and 75%, respectively) over the control and resulted in 40, 49, 20 and 14% higher biological yield (BY), grain yield (GY), 1000-grain weight (GW) and harvest index (HI) over the control, respectively. The effect of FYM on lentil growth and nodulation, either as sole or in integration with inorganic nutrients, was non-significant. The maximum HI by NPKSZn indicated the both S and Zn have improved nutrients assimilation into the economic portion of the crop. However, the S effect on nodulation and nodule growth was greater than Zn. This study concluded that foliar application of 3% S and Zn solution is necessary along with NPK to improve the yield and nodulation in lentil.
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