Abstract
A series of experiments was carried out at Students Farm, Sindh Agriculture University, Tandojam to evaluate the effect of NPK, micronutrients and N-pl acement on the growth and yield of sunflower during 2005-2006. The sunflower cv. HO-1 was studied under 7 differen t NPK levels and placement methods (0-0-0 NPK kg ha -1 , 6030-30 NPK kg ha -1 (N as broadcast), 60-30-30 NPK kg ha -1 (N as fertigation), 90-45-45 NPK kg ha -1 (N as broadcast), 90-45-45 NPK kg ha -1 (N as fertigation), 120-60-60 NPK kg ha -1 (N as broadcast), 120-60-60 NPK kg ha -1 (N as fertigation) and 7 varying zinc and boron do ses (0-0, 10.0-1.5, 10.0-2.0, 15.0-1.5, 15.0-2.0, 2 0.0-1.5 and 20.0-2.0 Zn-B kg ha -1 respectively). Both macronutrient and micronutrien t combinations showed significant differences and enhanced plant parameters. The valu es of all crop parameters increased as the dose of fertilizers increased. The tallest plant height, maximum stem g irth, largest head diameter, most seeds head -1 , heaviest seed weight head -1 , largest seed index and best seed yield (1738.0 kg ha -1 ) were recorded under application of 90-45-45 NPK with 15-1.5 Zn-B kg ha -1 (N applied as fertigation). Beyond these level of m acro- and micronutrients responses were not significant. The traditional fertility app lication, broadcast N at 120-60-60 NPK with 15-1.5 Zn-B kg ha -1 was no more effective in achieving higher values of crop parameters than comparable N-fertigated plots . The reason for increased values in N- fertigated plots may be that these plots received equal amounts of N in who le the plot during irrigation as compared to broadcast method. This study proved the incorporation of 90-45-45 kg ha -1 (N as fertigation) with 15-1.5 Zn-B kg ha -1 to be the optimum fertilizer dose for sunflower g rowth and yield. This could
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 5
Claim · model-written summary
Crop parameters increased with increasing fertilizer dose.
- Taxon
- SUNFLOWER
Helianthus annuust0 - Treatment
- dose of fertilizerse0
- Outcome
- crop parameterse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The valu es of all crop parameters increased as the dose of fertilizers increased.”
t0“SUNFLOWER”
Claim · model-written summary
The 90-45-45 NPK plus 15-1.5 Zn-B fertigation treatment produced the highest growth components and 1738.0 kg ha -1 seed yield.
- Taxon
- SUNFLOWERHelianthus annuust0
- Treatment
- 90-45-45 NPK with 15-1.5 Zn-B kg ha -1 (N applied as fertigation)e0
- Outcome
- seed yielde0
- Direction
- beste0
- Value
- 1738.0 kg ha -1e0
- Qualifier
- tallest plant height, maximum stem g irth, largest head diameter, most seeds head -1 , heaviest seed weight head -1 , largest seed indexe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The tallest plant height, maximum stem g irth, largest head diameter, most seeds head -1 , heaviest seed weight head -1 , largest seed index and best seed yield (1738.0 kg ha -1 ) were recorded under application of 90-45-45 NPK with 15-1.5 Zn-B kg ha -1 (N applied as fertigation).”
t0“SUNFLOWER”
Claim · model-written summary
Fertilizer levels beyond the optimum did not produce significant additional responses.
- Taxon
- SUNFLOWERHelianthus annuust0
- Treatment
- Beyond these level of m acro- and micronutrientse0
- Outcome
- responsese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Beyond these level of m acro- and micronutrients responses were not significant.”
t0“SUNFLOWER”
Claim · model-written summary
Broadcast nitrogen at 120-60-60 NPK with 15-1.5 Zn-B was no more effective than comparable nitrogen fertigation for crop parameters.
- Taxon
- SUNFLOWERHelianthus annuust0
- Treatment
- broadcast N at 120-60-60 NPK with 15-1.5 Zn-B kg ha -1e0
- Outcome
- crop parameterse0
- Direction
- no more effectivee0
- Comparator
- comparable N-fertigated plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“broadcast N at 120-60-60 NPK with 15-1.5 Zn-B kg ha -1 was no more effective in achieving higher values of crop parameters than comparable N-fertigated plots”
t0“SUNFLOWER”
Claim · model-written summary
The authors identified 90-45-45 NPK by fertigation plus 15-1.5 Zn-B as the optimum dose for sunflower growth and yield.
- Taxon
- sunflowerHelianthus annuuse0
- Treatment
- 90-45-45 kg ha -1 (N as fertigation) with 15-1.5 Zn-B kg ha -1e0
- Outcome
- optimum fertilizer dosee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This study proved the incorporation of 90-45-45 kg ha -1 (N as fertigation) with 15-1.5 Zn-B kg ha -1 to be the optimum fertilizer dose for sunflower g rowth and yield.”
The same questions in other papers
zinc atom · yield · Helianthus annuus (common sunflower)Results differ
42 papers in the same direction as this paper · 3 in the opposite direction
- positive
- positive
- negative
42 papers more in this group
See all 46 papers →fertilization · yield · Helianthus annuus (common sunflower)Positive and negative results
343 papers in the same direction as this paper · 18 in the opposite direction · 3 reporting no difference from an alternative
- no effect
- positive
- positive
361 papers more in this group
See all 365 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.