Journal of Experimental Agriculture International

Aim: To study response of various nitrogen levels and plant growth regulator on production and productivity of wheat crop (Triticum aestivum L.)

Study Design: The field experiment was conducted in randomized block design (RBD).

Place and Duration of Study: A field experiment was carried out in the Agriculture Farm, School of Agriculture, Abhilashi University Chail chowk Mandi (H.P.) during Rabi Season 2022-2023.

Methodology: Seven treatments namely T₁- Control (No Nitrogen and no growth regulator spray), T₂- 50% RDN (N₆₀, P₆₀, K₄₀), T₃- 75% RDN (N₉₀, P₆₀, K₄₀), T₄- 100% RDN (N₁₂₀, P₆₀, K₄₀), T₅- 125% RDN (N₁₅₀, P₆₀, K₄₀), T₆- 125% RDN (N₁₅₀, P₆₀, K₄₀) with growth regulator (Chlormequat chloride 0.2%), T₇- 150% RDN (N₁₈₀, P₆₀, K₄₀) with growth regulator (Chlormequat chloride 0.2%).

Results: The scrutiny of data clearly reveals that the application of 150% RDN (N₁₈₀, P₆₀, K₄₀) with growth regulator (Chlormequat chloride 0.2%) (T₇) gave significantly the highest value of growth parameter, yield attributes and yields, which is at par with T₆ [125% RDN (N₁₅₀, P₆₀, K₄₀) with growth regulator (Chlormequat chloride 0.2%)]. But the highest plant height was recorded under treatment (T₅) which is 125 % RDN (N₁₅₀, P₆₀, K₄₀) because under treatment T₇ & T₆ application of CCC causes the shortening of plant height. Nutrients were added according to treatment doses.

Conclusion: On the basis of one season study among various treatments, treatment T₇ -150% RDN (N₁₈₀, P₆₀, k₄₀) with growth regulator is best for enhancing the yield and productivity of wheat crop.