湖北高山草地白三叶种群的能量动态特征

生长季白三叶各构件热值及能量呈周期性波动，构件热值的大小顺序为：花序＞葡匐茎＞叶片＞根部，分别为21．1，20．5，20．0，19．0kJ/g。叶片第一个热值峰值期处于5月末至6月末，第二个峰值期处于8月末至11月初。除了花序能量较低外，白三叶其余各构件能量年平均值差异并不明显，叶片、葡匐茎及根部能量的最大值分别为2423．6，1926．1，1710．1kJ/m^2；季节平均值分别为1383．5，1424．6，1386．1kJ/m^2。白三叶构件能量及热值与生长日长短、降雨及气温之间存在显著或极显著相关关系。

Studies on patterns of energy dynamics of Trifolium repens on high mountain swards in Hubei China

Both the caloric value and the energy of modules of T. repens had cyclical fluctuations in growing season. The order of caloric value of modules of T. repens was inflorescence(21.1 kJ/g),stolon(20.5 kJ/g),leaf(20.0 kJ/g),and root(19.0 kJ/g).The first peak time of leaf caloric value occurred between May and June, while the second one occurred from August to November. There was little difference of average energy among leaf, stolon and root. The seasonal average of energy of leaf, stolon and root was 1 383.5,1 424.6, 1 386.1 kJ/m 2 respectively, while the max value was 2 423.6,1 926.1,1 710.1 kJ/m 2 . There were significant correlationships between caloric values, energy of T. repens modules and growing days, precipitation and temperature.