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Subject: Agricultural Meteorology × Author: Premdeep × End date: 2019 × Start date: 2019 × Thesis Type: Ph.D ×
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    ThesisItemOpen Access
    Study on microclimate of wheat crop and validation of DSSAT under different sowing environments
    (CCSHAU, Hisar, 2019-09) Premdeep; Khichar, M.L
    Field experiment entitled “Study on microclimate of wheat crop and validation of DSSAT under different sowing environments” was conducted during Rabi season (2015-16 and 2016-17) at research farm of Department of Agricultural Meteorology, CCS HAU, Hisar (29° 10 N, 75° 46 E and altitude 215.2 m). The experiment was comprised of three sowing dates main plot treatments namely D1 (2nd fortnight of November), D2 (1st fortnight of December) and D3 (2nd fortnight of December); three varieties V1 (WH 1105), V2 (DPW 621-50) and V3 (HD 2967) sub plot treatments comprising. The experiment was laid out in split plot design with three replications. Different agrometeorological indices viz. GDD, HTU, PTU and PTI accumulation was significantly higher under D1 (2nd fortnight of November) sowing date at all the phenophases in comparison to the other dates of sowing. The requirement of growing degree days were more in D1 (2nd fortnight of November). Highest PAR and RUE values obtained in D1 (2nd fortnight of November) date of sowing with V1 (WH 1105) variety as compared to other treatments.The highest plant height, dry matter accumulation and LAI was recorded under D1 and V1 with maximum CCI at anthesis stage. Chlorophyll fluorescence, photosynthetic rate, transpiration rate and stomatal conductance was highest recorded under D1 during anthesis stage as compared to other date of sowing. The yield and yield attributes viz. ear per plant, length of spike, test weight, grain yield, straw yield and biological yield significantly higher under early sowing (D1) as compared to late sown. Weather variables showed a positive and negative correlation with yield and yield attributes. Simulation performance of model showed an overestimation with days to emergence, anthesis, physiological maturity while grain yield, straw yield and harvest index showed a over-underestimation of results.