推荐回答(1个)
中国栽培的芥蓝品种很多,按照花的颜色可分为白花芥蓝和黄花芥蓝两种类型。
(一)黄花芥蓝
只有少量栽培,主要在福建省种植。茎秆肥大,不易抽薹,纤维较多,叶柄不太明显,叶长椭圆形,叶身下延,叶缘绿色或略带紫色、裂刻较深,叶面较皱、有蜡粉,叶柄淡绿色或淡紫色,香味浓郁。株高30~40cm,单株重50g左右,多食用幼株。有些品种如台湾省的黄金嫩叶,福建省的莆田黄花芥蓝、福州黄花芥蓝等,分枝性强,侧花薹数可达12~15根,花薹较细,叶色黄绿、有光泽,叶全缘,株型较矮,节间密,耐热,采收期长。
(二)白花芥蓝
栽培面积大,分布广,但主要在广东、广西等地种植。花薹肥嫩,叶柄较明显,具叶耳,以采收菜薹为主。按其熟性可分为早熟种、中熟种和晚熟种。按叶面状况又分为平滑叶和皱叶,大叶和小叶等类型。
1.早熟种耐热性较强,在较高温度(27~28℃)下花芽也可迅速分化和形成花薹,分枝力强,基生叶较疏散。适宜春夏、夏秋露地栽培。从播种至采收60d多,可持续采收35~45d,产量高,品质好。按叶面平滑与否又分为:
(1)滑叶早芥蓝 叶较小,卵形,浓绿色,叶面光滑,蜡粉多,叶基部深裂成耳状。主薹高25~30cm,横径2~3cm,主薹重100~150g。初花时花薹上的薹叶着生紧密,薹叶卵形或狭长卵形。侧枝萌发能力强。品质优。主要品种有:柳叶早芥蓝、柯子岭芥蓝、台湾滑叶白花芥蓝、细叶早芥蓝等。
(2)皱叶早芥蓝 叶大且肥厚,椭圆形,浓绿色,叶面较皱,蜡粉多。主薹高30~40cm,薹粗3~3.5cm,主薹重150~200g。初花时花薹上的薹叶较松散,薹叶较大。侧枝萌发力强。品质较好。代表品种有:早鸡冠、大花球鸡冠、九花球鸡冠、白花鸡冠、香港白花芥蓝等。
2.中熟种耐热性不如早芥蓝,耐寒性又弱于晚熟种。冬性较强,生长慢。基生叶稍密,分枝力中等。适宜春季保护地栽培和秋季露地、保护地栽培。一般来说,华南地区作秋冬栽培,长江流域作夏秋或秋冬栽培。播种至采收60~70d,可连续采收40~50d。以叶形大小又可分:
(1)大叶芥蓝 株高30~50cm,叶宽大、近圆形,长18cm、宽16cm,绿色,叶柄肥大,叶面平滑,蜡粉较少,有叶翼。花薹粗壮,主薹高33cm左右,浅绿色,薹叶密,节间短,基部粗,皮稍厚,纤维少。抽薹较晚,分枝性中等。品质佳。代表品种有:宜山白花滑叶、昆明大叶、成都平叶等。
(2)小叶芥蓝 株高40cm左右,叶卵圆形至长椭圆形,长16cm、宽13cm,绿色或浓绿色,叶面平滑或微皱,蜡粉较少或中等,叶基部有裂片。花薹较细,主薹高30~35cm、重100~150g,薹叶卵形至长卵形、无柄或叶柄极短,节间较长,质地脆甜,皮薄,纤维少。侧薹萌发力中等。品质优良。主要品种有:荷塘芥蓝、登峰芥蓝、台湾中花芥蓝等。
3.晚熟种不耐热,耐寒性最强。较低的温度和较长的低温时间有利于花芽分化,冬性较强。基生叶较密,叶大,分枝力较弱,营养生长期长,花薹采收期晚,花薹粗壮、高产,品质好。适宜冬季保护地栽培。华南地区为冬春栽培,长江流域作秋冬栽培。播种至初收70~80d,可连续采收50~60d。主要品种有:皱叶迟芥蓝、迟花滑叶芥蓝、钢壳叶芥蓝等。
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