Mulching, farmyard manure and exogenous application of osmo-protectants confer terminal heat tolerance in wheat (Tritcum aestivum)

HARIRAM

doi:10.59797/ija.v65i3.2983

Authors

HARIRAM

DOI:

https://doi.org/10.59797/ija.v65i3.2983

Keywords:

Farm yard manure, Mulch, Sowing dates, Terminal heat stress, Water-use efficiency

Abstract

A field experiment was conducted at Ludhiana, Punjab (India) with combinations of 2 sowing dates [timely sowing (10 November) and late sowing (15 December)] and 6 heat-stress-management treatments includes recommended dose of fertilizer (RDF: 150 : 27.3 : 24.8 N, P and K kg/ha), RDF + FYM (10 t/ha farmyard manure), RDF + mulch (rice straw mulch @ 4 t/ha), RDF + FYM + mulch, RDF + FYM + mulch + ZnSO4 (0.5%) and RDF + FYM + mulch + KCl (0.2%) in randomized block design with 3 replications during 201516 and 201617. The timely sown wheat showed higher emergence count, canopy air temperature difference, normalized difference vegetative index, days to earing/maturity, yield attributes, grain yield and water-use efficiency than the late-sown one. The grain yield recorded in RDF + FYM + mulch + KCl was the highest, which was statistically similar to RDF + 10 t FYM, RDF + Mulch, RDF + FYM + mulch and RDF + FYM + mulch + ZnSO4. The grain yield and water-use efficiency recorded in RDF + FYM + mulch + KCl, RDF + FYM + mulch + ZnSO4 and RDF + FYM + mulch was at par under late sown condition. Under late-sown conditions, RDF + FYM + Mulch + KCl can be used to ameliorate the adverse effect of terminal heat stress on wheat and enhance the grain yield and water use efficiency.

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