割梢对蔺草产量、品质的影响

Effects of Shearing Top on Yield and Quality of Mat Rush (Juncus effuses L.)

以割梢时间为主区，留苗高度为裂区，分析3次割梢时间（4月25日、5月5日和5月15日）和5种留苗高度[15cm、25cm、35cm、45cm和不割梢（70cm左右）]处理对蔺草有效草茎产量、群体草茎数量、优质长草茎产量及百支草茎千重等性状的影响。结果表明：仪征地区蔺草割梢时间以4月底至5月初为宜，即在最长草芽出生前15～25d；割梢后留苗高度掌握在45cm为佳。4月25日和5月5日割梢，留苗高度在45cm时，蔺草的经济产量、优质长草茎产量和草茎干重比不割梢处理分别增加13．24％、45．89％和10．49％。表明在4月底至5月初割梢和留苗高度在45cm时，不仅不会降低有效草茎产量，而且可以明显提高优质长草茎产量和草茎干重等品质性状，且能较好协调蔺草产量与品质间的矛盾。

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 afler 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 era-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 yieht and dry stem weight, which balanced the relationship of high yield and low quality of mat rush.