Report on comparative test of Phalaris arundinacea'Chuanxi'
A variety comparison experiment was conducted in BuTuo County,Sichuan Province,using Phalaris arundinacea'Chuan-caoyin No.3'and the original population as controls to evaluate the Phalaris arundinacea'Chuanxi'new strain.The experiment focused on assessing and comparing ecological restoration ability,waterlogging tolerance,and productivity.The results indicated that the overwinte-ring rate of'Chuanxi'was high in BuTuo County,showing the ability to complete the growth and development cycle normally without en-countering any pests or diseases during the experiment period.The ecological restoration efficiency of'Chuanxi'was 318 days,which was 12 days and 27 days less than the original population and'Chuancaoyin No.3',respectively,highlighting its superior ecological restora-tion capability.Both'Chuanxi'and the original population exhibited a 100%survival rate during the 20-day waterlogging stress,demon-strating significantly better waterlogging tolerance compared to'Chuancaoyin No.3'.The fresh grass yield and dry grass yield of the'Chuanxi'new strain were 70931.57 kg/hm2 and 20929.69 kg/hm2,respectively,significantly higher than those of the original popula-tion and'Chuancaoyin No.3'.The seed yield significantly exceeded that of the original population,with no significant difference from'Chuancaoyin No.3'.The crude protein content was 11.8%,1.2 and 2 percentage points higher than that of the original population and'Chuancaoyin No.3',respectively.Therefore,the Phalaris arundinacea'Chuanxi'new strain exhibits good consistency,strong adapta-bility,high ecological restoration efficiency,strong waterlogging tolerance,high grass yield,good grass quality,and a long green period.It can be utilized for ecological restoration of degraded wetlands and grasslands in the Chuanxi Plateau,as well as for establishing high-yield artificial grasslands.
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