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2016-03-31 16:20
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2016-03-31 16:19
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2015-11-13 16:48
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2015-11-13 14:05
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2015-11-09 09:37
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2015-11-07 14:58
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2015-11-06 11:16
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2015-11-04 13:39
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2015-11-04 11:00
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2015-11-03 16:29
小王
辣椒、茄子具体用基质怎么来育苗,用多少孔的穴盘?基质的配比,冬春和夏季有区别吗?播种到苗期的管理,温度和湿度是怎样的,如何控制好?苗龄?
 
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蔬菜穴盘育苗采用商品育苗基质,一次性完成装盘、播种、排场、成苗。商品育苗基质一般都添加了基质润湿剂、缓效性营养启动剂等调节物质,还进行了酸碱度调节和灭菌消毒处理,育苗效果好。育苗生产中应根据蔬菜种类、秧苗大小、不同季节生长速度、苗龄长短等因素来选择适当的穴盘,一般番茄、茄子、辣椒多采用50孔或72孔穴盘。
温度的高低对幼苗的生长有较大关系,温度过低,生长缓慢或停滞,造成僵苗;温度过高,则生长过快,易造成徒长。应掌握两高两低的原则,即播种后至出苗前温度高些,为加速出齐苗,白天充分见光提高床温,夜间覆盖保温,使出苗快而整齐;出苗后揭去地膜,辣椒幼苗期白天适宜温度2528℃、夜间1821℃,茄子幼苗期白天适宜温度2225℃、夜间1720℃;移栽前一周适当降低温度进行炼苗,以提高适应性和抗逆性,使秧苗健壮,移栽缓苗时间短,恢复生长快。我省冬春低温季节穴盘育苗一般需要加温,可整个大棚内进行加温,为节约成本,也可采用苗床上制作电热温床加热。
一般适于蔬菜育苗的含水量为基质持水量的60%80%较为适宜。夏天掌握早上温度低时浇水为宜,防止中午植株凋萎,傍晚浇水则容易造成植株拔高徒长;冬春育苗期间浇水一般宜干不宜湿,应尽量控制湿度,在中午温度高时浇同温水,以降低棚内湿度,防止幼苗徒长和病害发生,阴雨天、日照不足和湿度高时不宜浇水。畦床边缘的穴盘周边要用床土封实,防止穴盘边缘较快失水。
由于穴盘育苗定植期的弹性相对较小,在定植阶段如遇低温、阴雨等不良天气而推迟种植时,容易引起秧苗徒长,所以对苗龄的控制要求较为严格。一般冬春季茄果类穴盘苗苗龄60-70天、具真叶5-6张,夏秋季茄果类穴盘苗苗龄25-30天、具真叶4-5张。

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