title: [Energy accumulation and allocation of main plant populations in Aneurolepidium chinense grassland in Songnen Plain].
abstract: The calorific value of plants is dependent on their biological characteristics and energy-containing materials. The allocation of calorific value in different organs of Aneurolepidium chinese, Calamagrostic epigejos, Puccinellia tenuiflora and Chloris virgata was inflorescence > leaf > stem > dead standing. The seasonal dynamics of standing crop energy of aboveground part of four plant populations showed single-peak curve, and the energy production was Aneurolepidium chinense > Calamagrostic epigejos > Chloris virgata > Puccinellia tenuiflora. Energy increasing rate showed double-peak curve, with the first peak at heading stage and the second peak at maturing stage of seeds. Energy increasing rate was negative at the final stage of growth. The horizontal distribution of energy of aboveground part was that the allocation ratio of different organs at different growth stages was different. There existed a similar trend for vertical distribution of energy among four plant populations, i.e., was the vertical distribution of energy of aboveground part showed a tower shape, with the maximum value in 10-30 cm height. The vertical distribution of energy of underground part showed an inverted tower shape from soil surface to deeper layer, with the maximum value in 0-10 cm depth. The standing crop energy of underground part was about 3-4 times than that of aboveground part.
authors.affiliation: Grassland Research Institute, Northeast Normal University, Changchun 130024, China.
authors.forename: Guohui
authors.initials: G
authors.lastname: Qu
authors.forename: Mingzhang
authors.initials: M
authors.lastname: Wen
authors.forename: Jixun
authors.initials: J
authors.lastname: Guo
mesh_terms: D004734:Energy Metabolism; D010944:Plants / Q000378:metabolism*; D006109:Poaceae / Q000378:metabolism*; D012621:Seasons