早春类短命植物生物量研究(Ⅱ)——多被银莲花生物量及其分配特征

采用全收获法研究多被银莲花的生物量及其分配特征.结果表明:多被银莲花在株高达12 cm以上时开花、结果;随株高级的增大,茎叶生物量、地下生物量和果生物量增长明显,花生物量呈单峰型变化;根冠比呈整体下降的变化趋势.随着物候期的推移,总生物量、地上生物量和地下生物量分别增加4.31,5.30和3.45倍;生物量分配表现出由地下向地上转移和由生长向繁殖转移的特点,体现了多被银莲花将有限资源再分配于生长和繁殖之间的生存策略.采用直线、指数、对数和幂函数拟合的多被银莲花地上、地下和总生物量方程均具有较高的相关系数,但验证结果仅有幂函数均达到了建模标准,为多被银莲花生物量预测的最优方程.

On Spring Ephemeral Plants Biomass (Ⅱ)—Biomass and Distribution Characteristics of Anemone raddeana

The distribution characteristics and biomass of Anemone raddeana were analyzed by using total harvest method. The results were as follows:Anemone raddeana was blossom and bear fruit when its height reached above 12 cm. With increasing of height of Anemone raddeana,the stem and leaf biomass,underground biomass and fruit biomass increased significantly,but flower biomass increased first and then decreased,root-shoot declined. Total biomass,aboveground biomass and underground biomass respectively increased 4. 31,5. 30 and 3. 45 times with passage of phenological phase. Biomass allocation of Anemone raddeana was shifted from underground to aboveground and from vegetative growth to reproductive growth. The equation was fitted with aboveground biomass,underground biomass and total biomass of Anemone raddeana with height class by using linear equation, exponential equation,logarithmic equation and power function equation. It had been tested and verified that the best equation was power function equation.