观赏槭树的苗期试验初报

观赏槭树育苗试验表明,不同树种、种源间种实发芽率差异较大。发芽率较高的种类有樟叶槭(92%)、鸡爪槭(90%)、三角枫(90%),其次是复叶槭(85%)、红花槭(82%)、橄榄槭(76%)和元宝槭(75%);茶条槭、五角槭、罗浮槭发芽率均小于70%。1年生苗高生长量以复叶槭最大(113.98 cm),其次是三角枫(101.21 cm);樟叶槭和鸡爪槭1年生苗生长量中等,当年生长量分别为62.43 cm和71.74 cm;罗浮槭、青榨槭和橄榄槭1年生苗高生长量较小。季节生长节律有3种类型:橄榄槭、鸡爪槭、元宝槭、茶条槭等几种槭树表现为第1类型(前期生长型),即5月前苗木缓慢生长,6~7月进入速生期,7月以后苗木渐渐停止生长,速生期较短。复叶槭和青榨槭表现为第2种类型:1年生苗全年高生长有2次高峰,出现在6月和9月;樟叶槭和三角枫季节生长节律表现为第3种类型:5月生长缓慢,6月生长开始加快进入速生期,一直持续到8月底,速生期长。三角枫、橄榄槭、鸡爪槭、元宝槭、茶条槭、复叶槭和青榨槭等几种槭树表现出较强的抗寒性,樟叶槭和罗浮槭抗寒性较差。

A preliminary study on the seedling stage test of several garden maples

The seedling stage tests of several garden maples were carried out.The results showed germination percentage was different between various species and provenances.Such species as Acer cinnamomifolium,A.palmatum and A.buergerianum had the highest percentage;the germination percentage of A.negumdo,A.rubrum,A.olivaceum and A.truncatum came next while that of A.ginnala,A.fabri and A.mono had the lowest.The height growth of A.negumdo and A.buergerianum in first year was prevailing,up to 113.98 and 101.21 cm respectively while that of A.fabri,Acer davidii and A.olivaceum was the least.There were three types of season growth rhythm: the first growth type was called the prophase growth type,with A.davidii,A.palmatum,A.truncatum and A.ginnala included;the second growth type included A.negumdo and A.davidii,showing two growth peaks every year,present from June to September;the third growth type included both A.cinnamomifolium and A.buergerianum,with their rapid growth lasting from June to August.In addition,the ability to cold-resistance of the one-year seedlings was analyzed,with the results that A.cinnamomifolium and A.fabri were subject to coldness.