Energy accumulation and allocation of main plant populations in Aneurolepidium chinense grassland in Songnen Plain

Abstract

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 chinense, 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 matureing 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 in10～30 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 in0～10 cm depth. The standing crop energy of underground part was about 3～4 times than that of aboveground part.

Key words: Aneurolepidium chinense grassland, Calorific value, Energy accumulation and allocation, sponge city, low impact development., landscape pattern optimization, storm water management model

CLC Number:

Q947.1

QU Guohui, WEN Mingzhang, GUO Jixun. Energy accumulation and allocation of main plant populations in Aneurolepidium chinense grassland in Songnen Plain[J]. Chinese Journal of Applied Ecology, 2003, (5): 685-689.

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