推荐回答(4个)
苋菜多为露地直播,北方从4月初至8月可随时播种,6月至10月可以分批采收上市。由于苋菜是高温短日照蔬菜,春播抽薹开花较晚,茎、叶生长快,品质柔嫩;而夏秋播种时,高温短日照条件容易得到满足,所以抽薹开花早,茎、叶生长慢,品质粗老。
苋菜用种子繁殖,以采收幼苗为主的,多采用直播;以采收嫩茎、叶为主的,可以直播,也可以育苗移栽。
苋菜在排开播种时,要注意品种的选择。春播时,应先播彩苋和红苋,再播绿苋。因为彩苋一般耐寒力较强,彩苋和红苋的耐热力都较差,早播可以早收,使产量增加;绿苋一般耐热力较强,继彩苋和红苋之后采收,采收期较长,仍可保证一定的产量。夏秋季栽培时,最好选择耐热力较强的绿苋。
栽培苋菜时应选择地势平坦、排灌方便、杂草少的地块。苋菜种子很小,整地必须精细。苋菜的播种量根据不同栽培季节的气温决定,早春温度低,出苗差,播种量要加大,每667米2用种量为3千克;晚春播种的用种量为2千克;夏秋播种,用种量为1千克。
苋菜一般采用干籽撒播。春季在露地播种,播期较早时,或早春进行覆盖栽培时,播种前需要进行浸种催芽,将种子装在纱布袋内,放在温水中泡3~4小时,取出,去掉过多的水分,置28~30℃下催芽,胚根露出种皮后,即可播种。露地播种,当温度比较适宜时,如果土壤墒情好,可在均匀撒播种子后,薄薄覆盖一层过筛的粪土,然后覆盖地膜保湿,子叶破土时揭去地膜;如果土壤干燥,播前在畦中先灌水,等水渗下后撒播种子,然后盖粪土,厚约0.4厘米。早春播种10天左右可出苗,晚春和秋季用干籽播种的,4~5天出苗,催芽“落水”播种的,2~3天苗子就可以出齐。幼苗长出2片真叶后,生长加快,进行第一次追肥,长出4~5片真叶后,进行第二次追肥,以后每采收1次追1次肥。追肥以氮肥为主,结合浇水进行,宜淡不宜浓。夏季除随追肥浇水外,还应浇几次清水以降低地温。
苋菜一般实行一次播种多次采收。苗高7~10厘米时进行第一次采收,间拔大苗及生长过密的苗,以后根据田间苗子生长情况,还可间苗1~2次,使苗距达到13厘米左右。等植株高度达25厘米左右时,基部留5~10厘米,割取嫩梢。等侧枝长出后继续采收。
春季栽培的苋菜,播种后50~60天开始采收,一直收到6~7月,每667米2产量可达1500~2000千克。夏秋季栽培苋菜,播种后30天左右就可开始采收,只采收1~2次,每667米2产量可达1000千克。
苋菜可以移栽。
移栽时应注意土壤的选择,苋菜适宜生长在微量元素丰富、排水良好的土壤中,移栽苋菜可利用有机质含量高、土壤质量疏松的砂壤土或黄壤,在移栽前需要对土壤进行消毒处理。
在移植苋菜时,为了尽快恢复植物的正常生长,必须适当地修剪苋菜。需要选择生长粗壮、不受病虫害影响的健康植物,然后用剪刀剪掉长得太薄、太密而无法保存营养的根。
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移栽注意:
移栽后,将富含矿物质的河水或湖水浇灌到种植苋菜的土壤中,保持土壤湿润,使苋菜更好地适应环境,移栽后只能为苋菜提供一次水,等待苋菜恢复正常生长后再浇水。
苋菜移栽时,免疫力低,易出现病害,移植后有必要定期喷洒多菌灵溶液,消除苋菜上的细菌,同时还可定期给苋菜进行通风,改善植株生长环境的通风,使苋菜健康生长。
。。。当然可以,最好趁小移栽,因为长大后会根会扎得挺深的
可以育苗移栽
播种 播种前要浇足底水,水渗下后,撤底土,再播种。早春播种,气温低,出苗差,播种量宜大,每亩3~5千克。晚春或晚秋播种,每亩播种量2千克。夏季及早秋播种,气温较高,出苗快且好,每亩播种量1~2千克。以采收嫩茎为主的,要进行育苗移栽,株行距30厘米。
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