四种早春植物生物量的动态研究

对4 种常见早春植物--荠菜、独行菜、夏至草和早开堇菜生长发育期生物量的动态进行了研究, 并用回归分析研究了生物量和时间之间的关系, 结果表明:4 种早春植物中, 荠菜果实、夏至草茎、独行菜茎、早开堇菜茎和总生物量与时间的回归方程极显著。在生殖生长后期, 相当大的能量积累于果实中, 果实的生物量所占比重较大, 其中最大值为荠菜56.7%, 独行菜40.6%, 夏至草25.2%, 早开堇菜18.1%。植株重量最大增长速率发生时间:荠菜、独行菜、夏至草株重增长高峰期相对集中于4 月下旬, 而早开堇菜为5 月中旬。

ON THE BIOMASS DYNAMICS OF FOUR EARLY SPRING PLANTS IN TAIYUAN,SHANXI

Capsella bursa-pastoris, Lepidium apetalum, Lagopsis supina and Viola prionantha are four common early spring plants in Taiyuan, Shanxi. The biomass dynamics during their growth and development processes were studied by using harvest method and regression analysis, moreover, the relationship between the biomass and time were analyzed by regression analysis. The results were as follows: (1) The regression equations between the biomass of C. bursa-pastoris fruits,L. apetalum stem,L. supina stem,V. prionantha stem and total and time are high significant. (2) Accumulation of photosynthetic products was used to produce large amount of seeds. As a result, the proportion of the mature fruit's biomass in total was fairly high,among which the maximum were C. bursa-pastoris 56.7%, L. apetalum 40.6%, L. supina 25.2% and of V. prionantha 18.1%,respectively. (3) It was suggested that most of the early spring plants grow rapidly in May. C. bursa-pastoris, L. apetalum and L. supina reached the climax of their biomass increment ratio during the end of April, whereas V. prionantha weight peaks took place during the middle of May.