封闭时间对模拟践踏的沟叶结缕草草坪质量的影响

在春季、梅雨季和盛夏季对践踏胁迫的沟叶结缕草草坪进行封闭15和30 d处理,研究封闭对践踏胁迫下沟叶结缕草草坪坪用性状的影响,结果表明,春季封闭显著提高了结缕草垂直高度和叶片长度(P<0.05),而梅雨和盛夏季封闭仅分别显著提高了草坪的垂直高度和叶片长度(P<0.05);春季封闭明显提高了草坪的密度和地上活生物量(P<0.05),封闭30和15 d的草坪密度分别比对照提高136.4%和40.3%,地上活生物量分别提高173.9%和42.0%;与盛夏季封闭相比,梅雨季节封闭更有助于减缓草坪密度下降的趋势,且地上活生物量在整个生长季几乎都大于盛夏季节封闭;垂直高度、叶片长度、草坪密度和地上活生物量,封闭30 d的效果均比15 d好;综合各项指标,阶段封闭措施对改善践踏胁迫下沟叶结缕草草坪的坪用质量效果显著,其中春季封闭的效果比梅雨季好,梅雨季比盛夏季好,封闭30 d的效果比15 d好.

Effect of fencing trampled lawn on phenotypic traits of Zoysia matrella

This experiment was conducted to examine the effect of fencing trampled lawn on turf height,stretch turfgrass height,leaf length,tiller density and green biomass.The treatments of fencing trampled lawn were conducted in three seasons(spring,early summer and later summer) and areas were fenced for 15 and 30 d in each season.The turf height was higher in early summer than in later summer during the experimental period.The stretch turfgrass height and leaf length were significantly larger(P<0.05) in spring,and in early summer as well as in later summer.The tiller density was significantly larger(P<0.05) in spring,with an increase of 136.4% in 30 d and 40.3% in 15 d compared with that in the CK.However the tiller density decreased in both early summer and later summer,but this decreased rate of tiller density was slower in early summer than that in late summer.Green biomass was significantly(P<0.05) larger in spring,with an increase of 173.9% in 30 d and 42.0% in 15 d compared with the CK.The green biomass in early summer was higher than that in late summer.The effects of fencing lawn on stretch turfgrass height,leaf length and tiller density were better after 30 d than after 15 d.These results suggest the treatment of fencing traffic lawn has a good effect on improving quality of trampled Zoysia matrella lawn.The effect of fencing in spring was better than in early summer,while early summer was better than later summer;Fencing for 30 d was more effective than for 15 d.