推荐回答(1个)
梨属于蔷薇科(Rosaceae)梨属(Pyrus.L)植物,共有30多个种,从栽培上划分为两大栽培种类群,即西方梨和东方梨。西方梨或称欧洲梨(european pear),也称西洋梨,起源于地中海和高加索,除主栽于欧洲和北美洲外,也是南美洲、非洲和澳洲生产栽培的主要种类。东方梨也称亚洲梨(asianpear),起源于我国,包括沙梨、白梨、秋子梨、新疆梨、川梨及野生的褐梨、杜梨、豆梨等原始种,主要栽培于中国、日本、韩国等亚洲国家。现将我国生产上与栽培有关的主要种介绍如下:
1.秋子梨
乔木,高达10~15m。生长旺盛,发枝力强,老枝灰黄或黄褐色。叶多大型,广卵圆或卵圆形,基部圆或心脏形,叶缘锯齿芒状直出。花轴短。果多近球形,暗绿色,果柄短,萼宿存,经后熟可食,抗寒力强。
2.白梨
乔木,高8~13m。嫩枝较粗,密生白色茸毛。嫩叶紫红色,密生白色茸毛,叶大,卵圆形,基部广圆或广楔或截形,叶缘锯齿尖锐有芒,向内合,叶柄长。果倒卵形至长圆形,果皮黄色,果柄长,子房4~5室,果肉多数细脆、味甜。多数优良品种属于本种。
3.沙梨
乔木,高7~12m。发枝少,枝多直立,嫩枝、幼叶有灰白色茸毛,二年生枝紫褐色或暗褐色。叶片大,长卵圆形,叶缘锯齿尖锐有芒,略向内合,叶基圆或近心脏形。花一般较大。果多圆形,果皮褐色,杂交种沙梨有绿皮的,萼脱落,子房5室,肉脆、味甜、石细胞略多。
4.西洋梨
乔木,高6~8m。枝多直立,小枝无毛有光泽。叶小,卵圆或椭圆形,革质平展,全缘或钝锯齿,果柄细、略短。栽培品种果多葫芦形、坛形。萼宿存,多数要后熟可食,肉软腻易溶,味美香甜,可加工,不耐贮藏。
5.杜梨
乔木,高超过10m。枝常有刺,嫩枝密生短白茸毛,叶面光滑,背面多短毛,叶片菱形或卵圆形,叶缘有粗锯齿。花小,花期晚。果球形,直径0.5~1.0cm,褐色,萼脱落,子房2~3室。抗旱、抗寒、抗涝、抗碱、抗盐力均较强,分布广,类型多,为我国普遍应用的砧木。
6.新疆梨
乔木,为西洋梨与白梨的自然杂交种,高6~9m。小枝紫褐色,无毛。叶卵圆或椭圆形。果卵圆至倒卵圆形,果柄先端肥大,较长,萼宿存,石细胞多。西北现有香蕉梨、花长把梨、克兹二介、可克二介等栽培品种和半栽培品种句句梨等。
7.麻梨
乔木,高8~10m。嫩枝有褐色茸毛,二年生枝紫褐色。叶卵圆至长卵圆形,具细锯齿,向内合。果小,直径1.5~2.2cm,球形或倒卵形,色深褐,多宿萼,子房3~4室。产华中、西北各省,为西北常用砧木。
8.木梨
乔木,高8~10m。嫩枝无毛或稀茸毛。叶卵圆或长卵圆形,叶基圆,实生树叶缘多钝锯齿,叶无毛。果直径1~1.5cm,小球形或椭圆形,褐色。抗赤星病,为西北常用砧木。
9.豆梨
乔木,高5~8m。新梢褐色无毛。叶阔卵圆或卵圆形,叶缘细钝锯齿,叶展后即无毛。果球形,直径1cm左右,深褐色,萼脱落,子房2~3室。为我国中南部通用砧木,适应温暖、湿润、多雨、酸性土壤地区。
10.褐梨
乔木,高5~8m。嫩枝有白色茸毛,二年生枝褐色。果椭圆形或球形,褐色,子房3~4室,萼脱落,果实汁多、肉绵,北京、河北东北部山区用作砧木。在西北、河北尚有部分栽培品种,果小,丰产、抗风。需后熟方可食用,如吊蛋梨、糖梨、麦梨等20多个品种。
世界梨树栽培有关的主要种见表。
世界梨树栽培有关的种类

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