灌溉对匍匐翦股颖草坪蒸散量、外观质量及地下植物量的影响

通过调控草坪灌水量,对北京地区3种匍匐翦股颖草坪蒸散量、草坪外观质量及地下植物量进行了研究。结果表明,灌水量显著影响蒸散量,灌水越多蒸散量越大,不同灌水量下草坪蒸散量的大小顺序为I1I0.8I0.6I0.4,3个品种的蒸散量的大小顺序为:宾A-4帕特宾A-1。I1与I0.8的差异不显著但与I0.6、I0.4存在显著差异,I0.6与I0.4间的差异不显著,品种间的蒸散量差异不显著;草坪外观质量间差异明显,I1与I0.8间的差异不显著,I1与I0.8分别与I0.6、I0.4间差异显著;灌水亦显著影响草坪地下植物量,灌水越多地下植物量就越大,I1与I0.8灌溉水平下,匍匐翦股颖草坪的地下植物量无显著的差异,I1、I0.8、I0.6分别与I0.4灌溉水平下的草坪地下植物量差异显著。草坪草有较大的节水空间,只要科学合理灌溉就能避免耗水过多的问题。

Effects of irrigation on evapotranspiration,apparent quality and underground biomass of three creeping bentgrass cultivars

The impacts of irrigation on evapotranspiration（ET）,apparent quality and underground biomass of three creeping bentgrass cultivars were studied by controlling quantity of water in Beijing.The results indicated that the ET was significantly influenced by the moisture conditions.With the increasing of water quantity,the ET was increased;The order of ET under different irrigation levels was I1I0.8I0.6I0.4 and the ET order of three bentgrass cultivars was Penn A-4PutterPenn A-1;Under different irrigation levels the turf apparent quality was significantly different,under I1 condition,it was not significantly different from I0.8,but significantly different from I0.6 and I0.4.Meanwhile,the turf biomass was changed by the irrigation levels.There were no significant differences between I1 and I0.8 in underground biomass,and no significant difference between I0.6 and I0.4,but they were significantly different from I0.6 and I0.4.Water consumption of turfgrass was in a wide range,and excess water consumption could be avoided by proper irrigation.