修剪频率和留茬高度对草地早熟禾与多年生黑麦草混播草坪质量的影响

摘要

研究了不同修剪频率(1次/周、1次/2周、1次/3周3个处理水平)和留茬高度3、5、7、9 cm 处理组合对草地早熟禾与多年生黑麦草混播草坪质量的影响。结果表明：随修剪频率降低、留茬高度的增加草坪草密度减小,叶片宽度增加,质地变劣,叶片颜色加深,生长速度先增大后减小,地上植物量和地下植物量均呈先增大后减小的趋势。草坪综合质量评价显示,H5F1处理草坪综合质量最优,H5F2处理次之,H3F2处理最差,12种处理草坪的综合质量从优到劣依次为：H5F1> H5F2> H7F2> H7F3>H7F1>H5F3>H9F1>H9F2>H9F3>H3F3>H3F1>H3F2。%The effect of mowing frequency (mowing interval :1 week,2 weeks and 3 weeks)and cutting height (3,5,7,and 9 cm)on the quality of mixture turf of Kentucky bluegrass(Poa pretensis )and perennial ryegrass(Lolium perenne )was studied.The results showed that along with the decreasing of mowing frequency and the increasing of cutting height,the density was decreased,the texture was coarser,the leaf color was dar-ker.And the growth rate increased firstly and then decreased.Meanwhile,the aboveground biomass and under-ground biomass were firstly increased and then decreased as well The comprehensive evaluation of turf quality showed that the treatment H5F1 had the highest quality,which was followed by H5F2,H3F2 was the poorest. The rank of the turf quality under 12 treatments was H5F1 > H5F2 > H7F2 > H7F3 > H7F1 > H5F3 >H9F1 >H9F2 >H9F3>H3F3>H3F1>H3F2.