Abstract
The effect of four regimes of irrigation on physiological and morphological characteristics of sunflower hybrids was studied at National Agricultural Research Centre (NARC), Islamabad, Pakistan. The four irrigation levels were control (no-irrigation), heading stage, heading + flowering stages, and heading + flowering + grain filling stages. Sub plot size of 4.5 m x 5 m was maintained and randomized complete block design in split plot arrangement having 5 replications were used. Water regimes/ irrigation were kept in the main plot while hybrids (Parsum-1 and SF-187) in the sub plot. Maximum seed yield (2680 kg ha -1 ) was obtained with three irrigations when compared with other treatments. Among the hybrids, SF-187 produced more yields (2440 kg ha -1 ) than the hybrid Parsun-1 (2333 kg ha -1 ). Oil content was lower (41.01%) in treatments receiving three irrigations. Seed yield with three irrigations was 24.83% higher than the control plot. Maximum leaf area index was observed when irrigation was given at 90 day interval after emergence of the sunflower (third irrigation). The same trend was also observed in dry matter accumulation and crop growth rate.
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Claims 6
Claim · model-written summary
Three irrigations gave maximum sunflower seed yield of 2680 kg ha -1.
- Taxon
- sunflower
Helianthus annuust0 - Treatment
- three irrigationse0
- Outcome
- seed yielde0
- Direction
- Maximume0
- Value
- 2680 kg ha -1e0
- Comparator
- other treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maximum seed yield (2680 kg ha -1 ) was obtained with three irrigations when compared with other treatments”
t0“sunflower hybrids”
Claim · model-written summary
SF-187 yielded 2440 kg ha -1, more than Parsun-1 at 2333 kg ha -1.
- Taxon
- sunflowerHelianthus annuust0
- Material
- SF-187e0
- Outcome
- yieldse0
- Direction
- moree0
- Value
- 2440 kg ha -1e0
- Qualifier
- 2333 kg ha -1e0
- Comparator
- Parsun-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SF-187 produced more yields (2440 kg ha -1 ) than the hybrid Parsun-1 (2333 kg ha -1 )”
t0“sunflower hybrids”
Claim · model-written summary
Oil content was lower at 41.01% with three irrigations.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- three irrigationse0
- Outcome
- Oil contente0
- Direction
- lowere0
- Value
- 41.01%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Oil content was lower (41.01%) in treatments receiving three irrigations”
t0“sunflower hybrids”
Claim · model-written summary
Seed yield under three irrigations was 24.83% higher than control.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- three irrigationse0
- Outcome
- Seed yielde0
- Direction
- highere0
- Value
- 24.83%e0
- Comparator
- control plote0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed yield with three irrigations was 24.83% higher than the control plot”
t0“sunflower hybrids”
Claim · model-written summary
Leaf area index was maximal with irrigation at a 90 day interval after emergence.
- Taxon
- sunflowerHelianthus annuuse0
- Treatment
- irrigation was given at 90 day interval after emergencee0
- Outcome
- leaf area indexe0
- Direction
- Maximume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maximum leaf area index was observed when irrigation was given at 90 day interval after emergence of the sunflower (third irrigation)”
Claim · model-written summary
Dry matter accumulation and crop growth rate followed the same trend as leaf area index.
- Taxon
- sunflowerHelianthus annuust0
- Outcome
- dry matter accumulation and crop growth ratee0
- Direction
- same trende0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The same trend was also observed in dry matter accumulation and crop growth rate”
t0“sunflower hybrids”
The same questions in other papers
irrigation · yield · Helianthus annuus (common sunflower)Positive and negative results
122 papers in the same direction as this paper · 39 in the opposite direction · 3 reporting no difference from an alternative
- negative
- negative
- positive
161 papers more in this group
See all 165 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.