Effects of shearing top on yield and quality of mat rush (Juncus effuses L.).

Effects of different shearing time and seedling height on characters of mat rush(Juncus effuses L.),such as effective stem yield,population stem quantity,good-quality long stem yield and dry stem weight,were studied with shearing time as main plot,seedling height as split plot.The main results were as follows: suitable time of top-shearing was from the late April to early May,and the best seedling height was 45 cm after top shearing.Compared with CK(No top shearing),the economic yield,good-quality long stem yield and dry stem weight of mat rush sheared on May 25th and April 5th with 45 cm-height seedling were increased by 13.24%,45.89%,and 10.49%,respectively.The results indicated that top shearing between late April and early May with 45 cm-height seedling left would not decrease effective stem yield.It significantly increased good-quality long stem yield and dry stem weight,which balanced the relationship of high yield and low quality of mat rush.