不同浓度海藻肥对高羊茅生长的影响  

Effects of different seaweed fertilizer concentration treatments on growth of Festuca arundinacea

作　　者：丁晨曦[1] 李永强[2] 董智[1] 王雅楣[2] 沈运扩[1] 

机构地区：[1]山东省土壤侵蚀与生态修复重点实验室山东农业大学林学院泰山森林生态站,山东泰安271018 [2]土肥资源高效利用国家工程实验室山东农业大学资源与环境学院,山东泰安271018

出　　处：《草业科学》2013年第5期674-677,共4页Pratacultural Science

基　　金：世界银行贷款项目(SEAP-JC-2)

摘　　要：本研究通过分析高羊茅(Festuca arundinacea)种子在施不同浓度(0、2.4、4.8、8.4和9.6g·L-1)海藻肥条件下的发芽和生长,以探索出最适宜种子萌发及生长的海藻肥浓度,为我国建植高羊茅草坪中海藻肥的应用提供科学依据和基础数据。结果表明,在5组不同浓度海藻肥处理下,4.8g·L-1浓度下高羊茅种子发芽率最高,为97.84%,与对照0g·L-1相比,提高了15.68%(P<0.01);同时,在4.8g·L-1浓度处理下,高羊茅的长势和根系体积均最大,分别为0.67cm·d-1和0.44mL,且高羊茅的长势与根系体积的变化趋势一致,即随着海藻肥浓度的增加呈先增大后减小趋势,而根冠比则相反;4.8g·L-1浓度处理下高羊茅鲜草产量和干草产量均最高,分别为148.38和42.45kg·hm-2,随着海藻肥浓度的增加,鲜草产量和干草产量呈先增加后减小趋势。因此,适宜的海藻肥浓度不仅能提高高羊茅种子的发芽率,还能提前高羊茅种子发芽的启动期,高羊茅生长的最适海藻肥浓度为4.8g·L-1。This research aimed to explore the most suitable germination and growth concentration, and pro- vide scientific basis and data for seaweed fertilizer＇s application in the artificial cultivation of F. arundina- cea in our country, through the experiment of Festuca arundinacea seeds at different seaweed fertilizer concentrations. The results showed that among the 5 treatments of different seaweed fertilizer concentra- tions, group C （4. 8 g . L-1）had the highest germination rate of F. arundinacea seeds, which was 97.84%, and comparing with lontrol group increased by 15.68%（P〈0.01）. The growth and root volume of F. arundinacea were 0.67 cm .d-1 and 0.44 mL, higher than these of other groups. With the increas- ing of seaweed fertilizer concentrations, the changes of tall fescue＇s growth, root volume, fresh yield and hay yield increased first then decreased. With the increasing of seaweed fertilizerconcentrations, the varia- tion of root/cap took on a ＂V＂ shape trend. The tall rescuers fresh yield and hay yield of group C were 148.38 kg . hm-2 and 42. 45 kg . hm-2, which were the highest. The optimal growth conditions of F. arundinacea were under 4.8 g . L-1 seaweed fertilizer treatment. Proper seaweed fertilizer concentra- tion can increase the tall rescue seeds germination rate, advance the start period of seed germination and increase the yield of F. arundinacea.

关 键 词：海藻肥 高羊茅 发芽率 生长速率 生物量 

分 类 号：S688.4[农业科学—观赏园艺]