Clonal Variation in Growth Response of Populus deltoides Bartr. to Nitrogen Fertilization Under Nursery Conditions

Ashfaq A. MIR; T. H. Masoodi; Naseer A. MIR; P. A. Sofi; T. A. Rather

doi:10.36808/if/2020/v146i9/154915

Clonal Variation in Growth Response of Populus deltoides Bartr. to Nitrogen Fertilization Under Nursery Conditions

Authors

Ashfaq A. MIR Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Benhama, Ganderbal-192123, Jammu and Kashmir
T. H. Masoodi Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Benhama, Ganderbal-192123, Jammu and Kashmir
Naseer A. MIR Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Benhama, Ganderbal-192123, Jammu and Kashmir
P. A. Sofi Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Benhama, Ganderbal-192123, Jammu and Kashmir
T. A. Rather Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Benhama, Ganderbal-192123, Jammu and Kashmir

DOI:

https://doi.org/10.36808/if/2020/v146i9/154915

Keywords:

Populus deltoides, Clonal variation, Nitrogen fertilization, Nursery conditions.

Abstract

Populus deltoides, an extensively planted poplar in Jammu and Kashmir and is one of the ten most prominent tree species grown in the State. A strapping clone x fertilizerinteraction was observed fordiameter, height and biomass. Growth response of six male clones of this species to three levels ofnitrogen (50, 75 and100 kg ha¹) was evaluated in nursery for two years to produce healthy and vigorous nursery stock. While application of N- fertilizer @ 75 kg ha¹ recorded maximum height, diameter, number of branches plant', numberofleaves plant', leafarea plant', internodal length and total biomass (fresh and dry) plant', the application of 100 kg N ha ' was observed to exert toxic effects and reduced the growth performance. In terms ofefficient utilization ofNitrogen fertilizer (NUE), the application of 50 kg N ha ' yield maximum biomass p er unit of N- used by the plant. The male clones have recently received a lot of attention due to the increasing cotton mince produced by female clones in Kashmir valley. In currentscenario male clones are the betterperspective to replace the female ones without compromising the economy generated by this species.

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