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Transgenic Corn Response to Nitrogen Rates under Corn Rootworm Pressure
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| Zeitschriftentitel: | Agronomy Journal |
|---|---|
| Personen und Körperschaften: | , , |
| In: | Agronomy Journal, 109, 2017, 4, S. 1632-1641 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
Wiley
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| Schlagwörter: |
| author_facet |
Leaf, Trisha Ostlie, Kenneth Kaiser, Daniel Leaf, Trisha Ostlie, Kenneth Kaiser, Daniel |
|---|---|
| author |
Leaf, Trisha Ostlie, Kenneth Kaiser, Daniel |
| spellingShingle |
Leaf, Trisha Ostlie, Kenneth Kaiser, Daniel Agronomy Journal Transgenic Corn Response to Nitrogen Rates under Corn Rootworm Pressure Agronomy and Crop Science |
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leaf, trisha |
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Leaf, Trisha Ostlie, Kenneth Kaiser, Daniel 0002-1962 1435-0645 Wiley Agronomy and Crop Science http://dx.doi.org/10.2134/agronj2016.03.0154 <jats:sec><jats:title>Core Ideas</jats:title><jats:p><jats:list list-type="bullet"> <jats:list-item><jats:p><jats:italic>Bacillus thuringiensis</jats:italic> rootworm traits and corn rootworm feeding affected N uptake and root mass.</jats:p></jats:list-item> <jats:list-item><jats:p>N uptake by DK44‐61 SSX at V6 lagged DK46‐60 VT3 and DK 44‐92 RR2.</jats:p></jats:list-item> <jats:list-item><jats:p>DK44‐92 RR2 had a larger root system at V6 than either DK46‐60 VT3 or DK44‐61 SSX.</jats:p></jats:list-item> <jats:list-item><jats:p>Rootworm injury limited N uptake, root mass of DK44‐92 at V12 compared to Bt hybrids.</jats:p></jats:list-item> <jats:list-item><jats:p>Root mass, trait efficacy, and root injury interplay with N rate have insect resistance management implications.</jats:p></jats:list-item> </jats:list></jats:p></jats:sec><jats:sec><jats:label /><jats:p>Recommended N rates for corn (<jats:italic>Zea mays</jats:italic> L.) typically consider yield, economic, and environmental dimensions, but not optimal protection by <jats:italic>Bacillus thuringiensis (Bt</jats:italic>) Berliner‐based traits against corn rootworm (CRW) (<jats:italic>Diabrotica</jats:italic> spp.). This research explored N rate effects on CRW trait performance under CRW pressure. The experiment featured a split‐plot randomized complete block design with factorial treatment combinations of N rates and hybrids differing in CRW traits. Root mass, N uptake, CRW efficacy, and grain yield data were collected from two locations in 2011. Root mass at growth stage V6 (before CRW injury) increased with N rate and was greater in the Roundup Ready (RR2) hybrid (Monsanto, St. Louis, MO) by 30.6%. Nitrogen uptake was similar between VT Triple (VT3) (Monsanto, St. Louis, MO) and the RR2 hybrids, which exceeded the SmartStax (SSX) (Monsanto, St. Louis, MO: Dow AgroSciences Indianapolis, IN) hybrid by 12.5%. By growth stage V12, CRW injury in the RR2 vs. <jats:italic>Bt</jats:italic> hybrids reduced N uptake by 42.0%, Beetle emergence was reduced 66 to 91% by <jats:italic>Bt</jats:italic> hybrids. Yield response to N differed between hybrids at only one site: the CRW‐injured RR2 hybrid was unable to utilize increasing N rates while the SSX hybrid did not plateau. Recommended N rates (134–185 kg N per ha<jats:sup>−1</jats:sup>) were sufficient to optimize root mass, N uptake, root protection, and yield under a low stress, modest CRW‐pressure environment: however, low N resulted in poor performance of these hybrids, suggesting further exploration of N rate effects when N loss or denitrification is present.</jats:p></jats:sec> Transgenic Corn Response to Nitrogen Rates under Corn Rootworm Pressure Agronomy Journal |
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| title |
Transgenic Corn Response to Nitrogen Rates under Corn Rootworm Pressure |
| title_unstemmed |
Transgenic Corn Response to Nitrogen Rates under Corn Rootworm Pressure |
| title_full |
Transgenic Corn Response to Nitrogen Rates under Corn Rootworm Pressure |
| title_fullStr |
Transgenic Corn Response to Nitrogen Rates under Corn Rootworm Pressure |
| title_full_unstemmed |
Transgenic Corn Response to Nitrogen Rates under Corn Rootworm Pressure |
| title_short |
Transgenic Corn Response to Nitrogen Rates under Corn Rootworm Pressure |
| title_sort |
transgenic corn response to nitrogen rates under corn rootworm pressure |
| topic |
Agronomy and Crop Science |
| url |
http://dx.doi.org/10.2134/agronj2016.03.0154 |
| publishDate |
2017 |
| physical |
1632-1641 |
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<jats:sec><jats:title>Core Ideas</jats:title><jats:p><jats:list list-type="bullet">
<jats:list-item><jats:p><jats:italic>Bacillus thuringiensis</jats:italic> rootworm traits and corn rootworm feeding affected N uptake and root mass.</jats:p></jats:list-item>
<jats:list-item><jats:p>N uptake by DK44‐61 SSX at V6 lagged DK46‐60 VT3 and DK 44‐92 RR2.</jats:p></jats:list-item>
<jats:list-item><jats:p>DK44‐92 RR2 had a larger root system at V6 than either DK46‐60 VT3 or DK44‐61 SSX.</jats:p></jats:list-item>
<jats:list-item><jats:p>Rootworm injury limited N uptake, root mass of DK44‐92 at V12 compared to Bt hybrids.</jats:p></jats:list-item>
<jats:list-item><jats:p>Root mass, trait efficacy, and root injury interplay with N rate have insect resistance management implications.</jats:p></jats:list-item>
</jats:list></jats:p></jats:sec><jats:sec><jats:label /><jats:p>Recommended N rates for corn (<jats:italic>Zea mays</jats:italic> L.) typically consider yield, economic, and environmental dimensions, but not optimal protection by <jats:italic>Bacillus thuringiensis (Bt</jats:italic>) Berliner‐based traits against corn rootworm (CRW) (<jats:italic>Diabrotica</jats:italic> spp.). This research explored N rate effects on CRW trait performance under CRW pressure. The experiment featured a split‐plot randomized complete block design with factorial treatment combinations of N rates and hybrids differing in CRW traits. Root mass, N uptake, CRW efficacy, and grain yield data were collected from two locations in 2011. Root mass at growth stage V6 (before CRW injury) increased with N rate and was greater in the Roundup Ready (RR2) hybrid (Monsanto, St. Louis, MO) by 30.6%. Nitrogen uptake was similar between VT Triple (VT3) (Monsanto, St. Louis, MO) and the RR2 hybrids, which exceeded the SmartStax (SSX) (Monsanto, St. Louis, MO: Dow AgroSciences Indianapolis, IN) hybrid by 12.5%. By growth stage V12, CRW injury in the RR2 vs. <jats:italic>Bt</jats:italic> hybrids reduced N uptake by 42.0%, Beetle emergence was reduced 66 to 91% by <jats:italic>Bt</jats:italic> hybrids. Yield response to N differed between hybrids at only one site: the CRW‐injured RR2 hybrid was unable to utilize increasing N rates while the SSX hybrid did not plateau. Recommended N rates (134–185 kg N per ha<jats:sup>−1</jats:sup>) were sufficient to optimize root mass, N uptake, root protection, and yield under a low stress, modest CRW‐pressure environment: however, low N resulted in poor performance of these hybrids, suggesting further exploration of N rate effects when N loss or denitrification is present.</jats:p></jats:sec> |
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| description | <jats:sec><jats:title>Core Ideas</jats:title><jats:p><jats:list list-type="bullet"> <jats:list-item><jats:p><jats:italic>Bacillus thuringiensis</jats:italic> rootworm traits and corn rootworm feeding affected N uptake and root mass.</jats:p></jats:list-item> <jats:list-item><jats:p>N uptake by DK44‐61 SSX at V6 lagged DK46‐60 VT3 and DK 44‐92 RR2.</jats:p></jats:list-item> <jats:list-item><jats:p>DK44‐92 RR2 had a larger root system at V6 than either DK46‐60 VT3 or DK44‐61 SSX.</jats:p></jats:list-item> <jats:list-item><jats:p>Rootworm injury limited N uptake, root mass of DK44‐92 at V12 compared to Bt hybrids.</jats:p></jats:list-item> <jats:list-item><jats:p>Root mass, trait efficacy, and root injury interplay with N rate have insect resistance management implications.</jats:p></jats:list-item> </jats:list></jats:p></jats:sec><jats:sec><jats:label /><jats:p>Recommended N rates for corn (<jats:italic>Zea mays</jats:italic> L.) typically consider yield, economic, and environmental dimensions, but not optimal protection by <jats:italic>Bacillus thuringiensis (Bt</jats:italic>) Berliner‐based traits against corn rootworm (CRW) (<jats:italic>Diabrotica</jats:italic> spp.). This research explored N rate effects on CRW trait performance under CRW pressure. The experiment featured a split‐plot randomized complete block design with factorial treatment combinations of N rates and hybrids differing in CRW traits. Root mass, N uptake, CRW efficacy, and grain yield data were collected from two locations in 2011. Root mass at growth stage V6 (before CRW injury) increased with N rate and was greater in the Roundup Ready (RR2) hybrid (Monsanto, St. Louis, MO) by 30.6%. Nitrogen uptake was similar between VT Triple (VT3) (Monsanto, St. Louis, MO) and the RR2 hybrids, which exceeded the SmartStax (SSX) (Monsanto, St. Louis, MO: Dow AgroSciences Indianapolis, IN) hybrid by 12.5%. By growth stage V12, CRW injury in the RR2 vs. <jats:italic>Bt</jats:italic> hybrids reduced N uptake by 42.0%, Beetle emergence was reduced 66 to 91% by <jats:italic>Bt</jats:italic> hybrids. Yield response to N differed between hybrids at only one site: the CRW‐injured RR2 hybrid was unable to utilize increasing N rates while the SSX hybrid did not plateau. Recommended N rates (134–185 kg N per ha<jats:sup>−1</jats:sup>) were sufficient to optimize root mass, N uptake, root protection, and yield under a low stress, modest CRW‐pressure environment: however, low N resulted in poor performance of these hybrids, suggesting further exploration of N rate effects when N loss or denitrification is present.</jats:p></jats:sec> |
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| spelling | Leaf, Trisha Ostlie, Kenneth Kaiser, Daniel 0002-1962 1435-0645 Wiley Agronomy and Crop Science http://dx.doi.org/10.2134/agronj2016.03.0154 <jats:sec><jats:title>Core Ideas</jats:title><jats:p><jats:list list-type="bullet"> <jats:list-item><jats:p><jats:italic>Bacillus thuringiensis</jats:italic> rootworm traits and corn rootworm feeding affected N uptake and root mass.</jats:p></jats:list-item> <jats:list-item><jats:p>N uptake by DK44‐61 SSX at V6 lagged DK46‐60 VT3 and DK 44‐92 RR2.</jats:p></jats:list-item> <jats:list-item><jats:p>DK44‐92 RR2 had a larger root system at V6 than either DK46‐60 VT3 or DK44‐61 SSX.</jats:p></jats:list-item> <jats:list-item><jats:p>Rootworm injury limited N uptake, root mass of DK44‐92 at V12 compared to Bt hybrids.</jats:p></jats:list-item> <jats:list-item><jats:p>Root mass, trait efficacy, and root injury interplay with N rate have insect resistance management implications.</jats:p></jats:list-item> </jats:list></jats:p></jats:sec><jats:sec><jats:label /><jats:p>Recommended N rates for corn (<jats:italic>Zea mays</jats:italic> L.) typically consider yield, economic, and environmental dimensions, but not optimal protection by <jats:italic>Bacillus thuringiensis (Bt</jats:italic>) Berliner‐based traits against corn rootworm (CRW) (<jats:italic>Diabrotica</jats:italic> spp.). This research explored N rate effects on CRW trait performance under CRW pressure. The experiment featured a split‐plot randomized complete block design with factorial treatment combinations of N rates and hybrids differing in CRW traits. Root mass, N uptake, CRW efficacy, and grain yield data were collected from two locations in 2011. Root mass at growth stage V6 (before CRW injury) increased with N rate and was greater in the Roundup Ready (RR2) hybrid (Monsanto, St. Louis, MO) by 30.6%. Nitrogen uptake was similar between VT Triple (VT3) (Monsanto, St. Louis, MO) and the RR2 hybrids, which exceeded the SmartStax (SSX) (Monsanto, St. Louis, MO: Dow AgroSciences Indianapolis, IN) hybrid by 12.5%. By growth stage V12, CRW injury in the RR2 vs. <jats:italic>Bt</jats:italic> hybrids reduced N uptake by 42.0%, Beetle emergence was reduced 66 to 91% by <jats:italic>Bt</jats:italic> hybrids. Yield response to N differed between hybrids at only one site: the CRW‐injured RR2 hybrid was unable to utilize increasing N rates while the SSX hybrid did not plateau. Recommended N rates (134–185 kg N per ha<jats:sup>−1</jats:sup>) were sufficient to optimize root mass, N uptake, root protection, and yield under a low stress, modest CRW‐pressure environment: however, low N resulted in poor performance of these hybrids, suggesting further exploration of N rate effects when N loss or denitrification is present.</jats:p></jats:sec> Transgenic Corn Response to Nitrogen Rates under Corn Rootworm Pressure Agronomy Journal |
| spellingShingle | Leaf, Trisha, Ostlie, Kenneth, Kaiser, Daniel, Agronomy Journal, Transgenic Corn Response to Nitrogen Rates under Corn Rootworm Pressure, Agronomy and Crop Science |
| title | Transgenic Corn Response to Nitrogen Rates under Corn Rootworm Pressure |
| title_full | Transgenic Corn Response to Nitrogen Rates under Corn Rootworm Pressure |
| title_fullStr | Transgenic Corn Response to Nitrogen Rates under Corn Rootworm Pressure |
| title_full_unstemmed | Transgenic Corn Response to Nitrogen Rates under Corn Rootworm Pressure |
| title_short | Transgenic Corn Response to Nitrogen Rates under Corn Rootworm Pressure |
| title_sort | transgenic corn response to nitrogen rates under corn rootworm pressure |
| title_unstemmed | Transgenic Corn Response to Nitrogen Rates under Corn Rootworm Pressure |
| topic | Agronomy and Crop Science |
| url | http://dx.doi.org/10.2134/agronj2016.03.0154 |