关中地区几种苜蓿地上生物量初步研究

Preliminary research on the aboveground biomass of Alfalfa in Guanzhong area

对5个苜蓿Medicagosativa品种的地上生物量形成规律进行了初步研究。结果表明:苜蓿生物量的增长速率不仅与本身生理特性有关,而且与环境密切相关;株高在分枝末期现蕾初期增长速度快。绝对生长速率与相对生长速率在分枝末期现蕾期都较大,此时的水分管理具有重要意义;不同苜蓿品种的群落结构大多为菱形;同化系统与非同化系统的比值随高度的增加而减少。

Above-ground biomass of 5 alfalfa varieties was studied. The result indicated that biomass increase rate of alfalfa was not only related to the physiological characteristics of alfalfa but was also influenced by environment .The maximum growth rate of plant height appeared at the end of branching period and in early budding period. Absolute growth rate and relative growth rate was high in both end branching and early budding, water management was important in this time. Most of the community structure of different alfalfa varieties was rhombus. The ratio of assimilation system and non-assimilation system decreased with increased hight.