Growth and root pattern of barley (Hordeum vulgare) varieties as influenced by date of sowing and nitrogen levels
2016
Pankaj, Sooraj Chandra | Sharma, Pawan Kumar
Afield experiment was conducted at Ludhiana during rabi season2012-13. Asetof 27 treatment combinations including three dates of sowing, viz. 16ᵗʰ October (D1), 15ᵗʰ November (D₂) and 15ᵗʰ December (D₃) in main plot, three varieties (PL 172, PL 426 and PL 807) in sub plot and three nitrogen levels, viz. 75, 100 and 125% of recommended dose of nitrogen-RDN (62.5 kg ha⁻¹) in sub-sub plot were evaluated in barley (Hordeum vulgare L.). Crop sown on 16ᵗʰ October took minimum days (3) for initiation of emergence, whereas the highest number of days (8) was taken by the crop sown on 15ᵗʰ December. Interaction effect of barley varieties and date of sowing on dry matter production was significant and progressive increase in dry matter production by variety PL 172 and PL 426 as the sowing was delayed from 16ᵗʰ October to 15ᵗʰ December through 15ᵗʰ November. At dough stage leaf area index of variety PL426 was significantly higher than other two varieties when crop sown on 16ᵗʰ October. It was found that the root mass density (0–15 cm) was the highest in crop sown on 15ᵗʰ December, which was significantly higher than crop sown on 16ᵗʰ October but was statistically at par with 15ᵗʰ November sown crop. Application of 125% of RDN crop resulted in significantly higher root density up to a depth of 15 cm than crop received 75% of RDN, but was statistically at par with crop sown with the application of 100% of RDN.
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