关键词: 小麦, 落叶水浸提液, 化感作用, POD, 叶绿素

Abstract: 【Objective】 In order to understand the impact of fallen leaves on crop growth. 【Method】Through the determination of germination rate, root length, shoot length, chlorophyll content and POD enzyme activity of 5 wheat cultivars, an experiment was carried out to explore the effects of leaf water soluble extract of 4 tree species (willow, Bischofia polycarpa, chinese parasol and goldenrain tree) leaves on the seed germination and seedling growth of 5 wheat cultivars (Nongmai1, Yannong19, Jimai22, Heima1, and Shandong22). 【Result】 The results showed that low concentration (≤25 g/L) of willow leaf water extracts promoted the seed germination, root and seedling growth of Yannong 19 and Jimai 22, and had no effects on the synthesis of chlorophyll and the POD activities;while all treatment of Bischofia polycarpa leaf water extract inhabited the seed germination and seedling growth of 5 wheat cultivars;low concentration (≤50 g/L) of chinese parasol leaf water extract promoted the seed germination, root growth, the synthesis of chlorophyll in leaf and the POD activity of Shandong22; all treatment of goldenrain tree leaf water extract inhabited the root and seedling growth and the POD activity of 5 wheat cultivars. 【Conclusion】 The fallen leaves of Bischofia polycarpa and goldenrain tree are not suitable for returning to the fields. However, the appropriate amount of willow fallen leaves (≤25 g/L) promotes the growth of the wheat of Yannong19 and Jimai22 while the appropriate amount of chinese parasol fallen leaves (≤50 g/L) promotes the growth of Shandong 22 wheat.

Key words: wheat, leaf water extract, allelopathy, POD, chlorophyll