2024年7月18日 星期一 19:43:55

木薯膨大期宜施高氮高钾肥

        目前木薯进入伸长膨大期,并开始积累淀粉,需要有充足的氮肥和钾肥供应,所以要施高氮高钾肥。 
  具体施法:在木薯伸长膨大期间,施一次高氮高钾肥,每株施氮磷钾(18-6-21)复合肥0.25~0.30公斤,或施碳酸氢铵0.45~0.5公斤,氯化钾0.15~0.2公斤。先将木薯植株周围的杂草清除干净后,再将肥料均匀撒施在木薯植株周围的土壤中,然后用杂草覆盖住,最后培上一层厚15~20厘米的泥土,将肥料和杂草压埋住即可。另外,在木薯伸长膨大期间,还要叶面喷洒3~5次0.3%~0.5%硝酸钾水溶液,或0.1%~0.2%尿素、0.2%~0.3%磷酸二氢钾混合液,每7~10天喷洒一次,均匀喷湿所有的叶片,以开始有水珠往下滴为宜,从叶面补充氮肥和钾肥,才有利于木薯伸长膨大。
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