Vol. 12, Issue 10 (2023)

Author(s):
Rohit Kumar, SK Shah, Raju Lal Dhakar and HH Raval

Abstract:
A field experiment comprizing of nine treatments was cnducted to evaluate the Phosphorus Management in Cowpea [Vigna unguiculata (L.) Walp] in Loamy Sand. Significantly highest seed yield (1497 kg ha^-1) and stover yield (2257 kg ha^-1) was recorded under the treatment T₉ (30 kg P₂O₅/ha + enriched compost (1 t/ha) + Mycorrhiza), but it was remained at par with all the other treatments except T₁, T₂ and T₃. Treatment T₉ recorded significantly higher value of nitrogen content in seed (3.77%) and stover (0.698%); and potassium content in seed (1.57%) and stover (2.48%). Whereas, treatment T₉ recorded significantly higher value of phosphorus content in seed (0.65%) and stover (0.26%), it was remained at par with T₂ (PSB alone), T₃ (Mycorrhizae alone), T₇ (30 kg P₂O₅/ha + enriched compost (1 t/ha) + PSB), T₈ (30 kg P₂O₅/ha + Mycorrhiza). Treatment T₉ recorded significantly higher value of P uptake in seed (9.73 kg ha^-1) and stover (5.87 kg ha^-1), it was remained at par with T₆ (30 kg P₂O₅/ha + PSB), T₇ (30 kg P₂O₅/ha + enriched compost (1 t/ha) + PSB), T₈ (30 kg P₂O₅/ha + Mycorrhiza). The effect of phosphorus on available nitrogen and phosphorus was found significant. The available phosphorus in soil after harvest of cowpea (60.11 kg ha^-1)was found significant with Treatment T₉ and it was remained at par with T₇ (30 kg P₂O₅/ha + enriched compost (1 t/ha) + PSB), whereas the lowest value of available P (48.36 kg ha^-1) was recorded in absolute control (T₁).