Abstract
The research was carried out at the Experimental Station of Aleksandras Stulginskis University during 2015–2016 on medium textured loamy carbonaceous leached soil – Cal(ca)ri-Epihypogleyic Luvisols. The soil of the experimental field was the following: pHKCl 6.8–7.2; phosphorus (P2O5) – 423– 429 mg kg–1; potassium (K2O) – 157–163 mg kg–1; humus – 2.47–2.82%. The researchers explored the winter wheat crop (Triticum aestivum L.) variety ‘Skagen’ fertilized with amide (N-NH2), ammonium (N-NH4) and nitrate (N-NO3) forms of nitrogen fertilizers in different tillering stages (BBCH 21–29). 7 days after winter wheat was fertilized, the level of mineral nitrogen in the soil was on average 23.9% higher using ammonium–nitrate nitrogen form fertilizers than using amide nitrogen form ones. The index of chlorophyll and the area of leafs were essentially higher when ammonium– nitrate and amide forms of nitrogen fertilizers were used. The biggest effect on the index of chlorophyll and the area of leafs was achieved 16 days after the start of vegetation when plants were fertilized with ammonium–nitrate fertilizers. Plants fertilized with ammonium–nitrate fertilizers gave the biggest yield 4 days after the start of vegetation. Data of the experiment showed strong and statistically reliable bonds of the correlation between the grain yield and the time of fertilization with nitrogen fertilizers (ήamide nitrogen fertilizers = 0.850* and ήammonium–nitrate fertilizers = 0.878*).
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Claims 9
Claim · model-written summary
Ammonium–nitrate fertilizer gave 23.9% higher soil mineral nitrogen than amide after seven days.
- Taxon
- winter wheat
Triticum aestivume0 - Treatment
- ammonium–nitrate nitrogen form fertilizerse0
- Outcome
- level of mineral nitrogen in the soile0
- Direction
- highere0
- Value
- 23.9%e0
- Comparator
- amide nitrogen form onese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“7 days after winter wheat was fertilized, the level of mineral nitrogen in the soil was on average 23.9% higher using ammonium–nitrate nitrogen form fertilizers than using amide nitrogen form ones”
Claim · model-written summary
Ammonium–nitrate fertilizers produced a higher chlorophyll index.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- ammonium– nitratee0
- Outcome
- index of chlorophylle0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The index of chlorophyll and the area of leafs were essentially higher when ammonium– nitrate and amide forms of nitrogen fertilizers were used”
t0“winter wheat”
Claim · model-written summary
Amide fertilizer produced a higher chlorophyll index.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- amide forms of nitrogen fertilizerse0
- Outcome
- index of chlorophylle0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The index of chlorophyll and the area of leafs were essentially higher when ammonium– nitrate and amide forms of nitrogen fertilizers were used”
t0“winter wheat”
Claim · model-written summary
Ammonium–nitrate fertilizers produced larger leaf area.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- ammonium– nitratee0
- Outcome
- area of leafse0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The index of chlorophyll and the area of leafs were essentially higher when ammonium– nitrate and amide forms of nitrogen fertilizers were used”
t0“winter wheat”
Claim · model-written summary
Amide fertilizer produced larger leaf area.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- amide forms of nitrogen fertilizerse0
- Outcome
- area of leafse0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The index of chlorophyll and the area of leafs were essentially higher when ammonium– nitrate and amide forms of nitrogen fertilizers were used”
t0“winter wheat”
Claim · model-written summary
Ammonium–nitrate fertilization at 16 days produced the greatest chlorophyll index and leaf area effects.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- ammonium–nitrate fertilizerse0
- Outcome
- index of chlorophyll and the area of leafse0
- Direction
- biggeste0
- Qualifier
- 16 days after the start of vegetatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The biggest effect on the index of chlorophyll and the area of leafs was achieved 16 days after the start of vegetation when plants were fertilized with ammonium–nitrate fertilizers”
t0“winter wheat”
Claim · model-written summary
Ammonium–nitrate fertilization four days after vegetation began gave the largest yield.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- ammonium–nitrate fertilizerse0
- Outcome
- yielde0
- Direction
- biggeste0
- Qualifier
- 4 days after the start of vegetatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants fertilized with ammonium–nitrate fertilizers gave the biggest yield 4 days after the start of vegetation”
t0“winter wheat”
Claim · model-written summary
Grain yield correlated significantly with timing of amide nitrogen fertilization.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- amide nitrogen fertilizerse0
- Outcome
- grain yielde0
- Value
- 0.850*e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“strong and statistically reliable bonds of the correlation between the grain yield and the time of fertilization with nitrogen fertilizers (ήamide nitrogen fertilizers = 0.850* and ήammonium–nitrate fertilizers = 0.878*)”
t0“winter wheat”
Claim · model-written summary
Grain yield correlated significantly with timing of ammonium–nitrate fertilization.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- ammonium–nitrate fertilizerse0
- Outcome
- grain yielde0
- Value
- 0.878*e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“strong and statistically reliable bonds of the correlation between the grain yield and the time of fertilization with nitrogen fertilizers (ήamide nitrogen fertilizers = 0.850* and ήammonium–nitrate fertilizers = 0.878*)”
t0“winter wheat”
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