| Species |
ǂLAI-2009 |
LAI-2010 |
LAI-2011 |
LAI-mean |
N (g/m2 ground area)§ |
| Bromusinermis |
0.3233 |
0.5416 |
0.6826 |
0.5158 |
0.2182 |
| Poapratensis |
0.3081 |
0.4069 |
0.5165 |
0.4105 |
0.1908 |
| Helianthus pauciflorus |
0.1174 |
0.1496 |
0.1976 |
0.1548 |
0.1626 |
| Symphoricarposoccidentalis |
0.1746 |
0.196 |
0.2518 |
0.2075 |
0.1106 |
| Aster ericoides |
0.115 |
0.1257 |
0.1494 |
0.13 |
0.1029 |
| Rosa arkansana |
0.0882 |
0.1168 |
0.1618 |
0.1223 |
0.0834 |
| Oligoneuronrigidum |
0.0941 |
0.1178 |
0.1654 |
0.1258 |
0.0782 |
| Melilotusofficinalis |
0.0316 |
0.0933 |
0.1355 |
0.0868 |
0.0672 |
| Artemisia ludoviciana |
0.0907 |
0.0941 |
0.1242 |
0.103 |
0.0537 |
| Cirsiumflodmanii |
0.0301 |
0.042 |
0.0774 |
0.0499 |
0.0258 |
| Solidagomissouriensis |
0.0237 |
0.0053 |
0.0299 |
0.0196 |
0.0122 |
| Solidagomollis* |
0 |
0.0152 |
0.0259 |
0.0137 |
0.0090 |
| Tragopogondubius* |
0.0047 |
0.0187 |
0.0101 |
0.0111 |
0.0073 |
| Lotus purshianus* |
0 |
0 |
0.0305 |
0.0102 |
0.0067 |
| Stipaviridula |
0.0021 |
0 |
0.0137 |
0.0053 |
0.0045 |
| Solidagocanadensis |
0.0179 |
0 |
0.0023 |
0.0067 |
0.0043 |
| Anemone cylindrica* |
0.0005 |
0.0044 |
0.0127 |
0.0059 |
0.0039 |
| Psoraleaargophylla* |
0.0019 |
0 |
0.0119 |
0.0046 |
0.0030 |
| Asclepiasovalifolia* |
0 |
0 |
0.0117 |
0.0039 |
0.0026 |
| Cirsiumarvense* |
0.0045 |
0.003 |
0.0044 |
0.004 |
0.0025 |
| Achilleamillefolium |
0.0032 |
0.0038 |
0.0068 |
0.0046 |
0.0022 |
| Carexspp. |
0.0042 |
0.0023 |
0.001 |
0.0025 |
0.0020 |
| Phleum pretense* |
0 |
0 |
0.0066 |
0.0022 |
0.0014 |
| Taraxacumofficinale |
0.0025 |
0 |
0 |
0.0008 |
0.0003 |
| Total |
1.4383 |
1.9365 |
2.6297 |
2.0015 |
1.3156 |
|
| ǂLAI was measured five times from May to September in 2009 through 2011. Value for each species was estimated by the relative leaf area occurring within 1×1 m frames
as well as the absolute total seasonal LAI measured using a ceptometer (see main text for detail). |
| §Leaf nitrogen per unit ground area for each species was estimated by multiplying LAI of each species by area-based leaf nitrogen concentration (based on Figure 4). |
| *Species for which leaf nitrogen was not measured and an average value of 0.66 g/m2 (based on 25 species) was assumed. |
| Table 3: Leaf area indices (LAI) and leaf nitrogen per unit ground area for 24 plant species found in a moderately grazed pasture in the mixed-grass prairie near Streeter
N.D., USA. |
|
