滇南热带3种乡土地被植物的坪用研究初报

通过物候期观测、绿期观测、成坪指标测定、再生性测定、叶面积指数测定、茎生长指标测定和抗性指标评价,对滇南热带地区的3种乡土地被植物穗序木蓝Indigofera spicata、三点金Desmodium triflorum和地石榴Ficus tikoua进行了初步研究分析。结果表明:三者的花期集中于当地植物开花不多的雨季;绿期均达304 d以上;雨季成坪速度均快于干季,穗序木蓝雨季成坪62 d,成坪初期高12 cm,三点金雨季成坪28 d,成坪初期高1.5 cm,地石榴雨季成坪近3个月,成坪初期高度低于30 cm;三点金、穗序木蓝修剪后可在10 d内恢复盖度,地石榴需30 d左右;叶面积指数依次为4.69、2.52和1.69;生长旺盛,多分枝;抗性表现尤其是抗热、抗旱性均较强。研究认为3种乡土地被植物具有一定的园林应用前景。

The preliminary report on turf utilization of three tropical native groundcover plants in southern Yunnan

Indigofera spicata,Desmodium triflora and Ficus tokoua are three kinds of native groundcover plants which distribute in tropical area of southern Yunnan.In this paper,a preliminary research were carried out on these three species' phenological phases observation,green periods observation,turf formation factor measurement,regrowth ability measurement,leaf area index measurement,stem growth measurement,resistence and tolerance ability measurement.The results are shown as follows: they are in bloom in the local raining season while few species bloom in this season;all of their green periods last more than 304 d;they develop faster in raining season than in dry season.I.spicata establishes in 62 d with a height of 12 cm,D.triflorum in 28 d with a height of 1.5 cm,F.tikoua in near 3 months with a height of less than 30 cm.I.spicata and D.triflorum can recover in 10 d after mowing,while F.tikoua is in about 30 d.Their leaf area index is 4.69, 2.52,1.69 respectively.They thrive well and develop many branches.They show good resistance and tolerance ability especially heat resistance and drought tolerance.Finally,the research indicates that all of the three species have a bright future in landscape application.