关键词: 小麦, 干旱胁迫, 源库调节, 可溶性碳水化合物, 千粒重

Abstract: The standing crops of the litterfall in the succession series of evergreen broad-leaved forest in Tiantong, Ningbo,Zhejiang Province were compared in this paper.The results showed that the standing crops of litters and duffs in the communities dominated by Pinus massoniana were relatively high at early stage during the course of succession and those of the broad-leaved forest communities increased as succession proceeded. Similarly, those of humus in the succession series distinctly increased and the total standing crops of the litterfall as well as the rates of decomposition of the litterfall also increased. It exhibited the similar variation pattern with annual litterfall amounts, implying that succession could promote the biological cycling. Furthermore, the variation pattern of the components of litters and duffs during the succession courses were also compared and analysed.

Key words: wheat, drought stress, source-sink regulation, water soluble carbohydrate, 1000-grain mass.