黄花蒿浸提液对4种草坪草种子萌发及幼苗生长的影响

本研究采用不同浓度黄花蒿（Artemisia annua）地上和地下部浸提液在培养皿内处理4种草坪草种子并开展浸种发芽试验，结合种子萌发、幼苗生长指标和化感综合效应（Synthetic effect of allelopathy，SE）指标分析浸提液对幼苗的化感作用。种子萌发和幼苗生长指标表明，地上部和地下部浸提液抑制4类种子的萌发及幼苗根系的生长，但促进幼苗芽的生长。SE指数表明地上部浸提液抑制4类种子的萌发及幼苗的生长，对细弱翦股颖（Agrostis tenuis）的影响最大（SE=-0.32），对草地早熟禾（Poa pratensis）的影响最小（SE=-0.14）；地下部浸提液促进黑麦草（Lolium perenne）种子的萌发及幼苗的生长（SE=0.10），但却抑制其它3类草坪草，对草地早熟禾的影响最大（SE=-0.22），对高羊茅（Festuca arundinacea）的影响最小（SE=-0.05）。本研究将为草坪建植坪床处理黄花蒿提供理论依据。

Effect of Extract from Artemisia annua on Seed Germination and Seedling Growth of Four Species of Turfgrass

In present study,four species of cold-season turfgrass seeds were selected,and different concentrations of Artemisia annua extract collected from above-groud and below-ground parts were used for seed germination test in culture dishes. The allelopathy of extract on seedlings was analyzed through the seeds germination and seedlings growth as well as the synthetic effect of allelopathy. The seeds germination and seedlings growth showed that the extract collected from above-ground and below-ground parts had an inhibitory effect on the seeds germination and the seedling roots growth of 4 species of turfgrasses,but had a promoting effect on the growth of seedlings coleoptiles. The synthetic effect of allelopathy showed that the extract collected from above-ground parts had an inhibitory effect on the seeds germination and seedlings growth of 4 species of turfgrasses,but the effect on Agrostis tenuis was maximum (SE=-0.32) and on Poa pratensis was minimal (SE=-0.14). The extract collected from below-ground parts had a promoting effect on the seeds germination and seedlings growth of Lolium perenne (SE=0.10),but had an inhibitory effect on the seeds germination and seedlings growth of Agrostis tenuis,Festuca arundinacea and Poa pratensis,the effect on Poa pratensis was maximum (SE=-0.22) and on Festuca arundinacea was minimal (SE=-0.05). This study will provide a theoretical basis for the scientific treatment to Artemisia annua in flat beds when the lawn is planted.