Micrometeorology of wheat under different paddy residue management and sowing environments

Ankit Yadav

doi:10.56093/ijas.v96i7.166649

Authors

Ankit Yadav Ph.D. Scholar, Punjab Agricultural University, Ludhiana (141004)

https://doi.org/10.56093/ijas.v96i7.166649

Keywords:

Canopy temperature, crop micrometeorology, dates of sowing, paddy residue management, photosynthetically active radiation, wheat

Abstract

To study the microclimatic conditions within the wheat canopy due to different sowing environments and paddy residue management (PRM) techniques a field study was conducted in the research farm of the Department of Climate Change and Agricultural Meteorology, Punjab Agricultural University (PAU), Ludhiana. The wheat variety PBW-725 was sown on three dates (D1: 22nd October, D2: 28th November, D3: 6th December) and subjected to three PRM treatments: mulching (M1), incorporation (M2), and residue removal (M3). Canopy temperature (CT), relative humidity (CRH) and intercepted photosynthetically active radiation (PAR) were measured for each treatment at crown root initiation, jointing, anthesis and physiological maturity. It was found that timely sowing (D1) and paddy residue mulching (M1) optimized canopy temperature regulation. Mulching can also increase bottom canopy temperatures due to enhances water retention; timely sown crop had higher RH in vegetative stage but delayed sowing (D3) aligned with more favourable RH conditions at anthesis stage. D1 also enhanced light interception across growth stages, while D3 reduced PAR% capture, especially during reproductive phases. M1 further improved light interception efficiency, promoting better canopy development and radiation use. The study also revealed that timely sowing, combined with paddy residue mulching and incorporation, led to enhanced yield and improved yield-related traits. The study underscores that optimal PAR and lower CT at key growth stages (anthesis and physiological maturity) are crucial for wheat yield maximization, providing actionable insights for crop management and climate-resilient breeding strategies.

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