Effect of glufosinate application on leaf and seed nitrogen content and delta 15N in glufosinate-resistant, glyphosate-resistant, and conventional soybean in a field study at Stoneville, MS, 2009 and 2010a.
|Herbicide||Rate (g/ha)||Application timing||Nitrogen content (%)||Delta 15Nb|
|Leaf at V5||Leaf at R4||Seed|
| No glufosinate||0||4.84b||5.64a||6.22b||0.20a|
| Glufosinate fb||450||EPOST||5.23a||5.87a||6.38a||0.21a|
| No glufosinate||0||5.17a||5.85b||6.49a||0.83a|
| No glufosinate||0||5.31b||5.06b||6.30a||0.55a|
|Abbreviations: fb: followed by; EPOST: early postemergence applied at 3 wk after planting; LPOST: late postemergence applied at 6 wk after planting. |
aMeans within a column for each soybean type followed by the same letter are not statistically significant at the 5% level as determined by Fisher’s LSD test.
b Delta 15N was determined in leaf samples taken at R4 soybean growth stage.