2024年7月18日 星期一 19:43:55

木薯喷多效唑高产

      在木薯地下茎迅速膨大期间,地上茎也快速生长,如果雨水充足,就会徒长、疯长,大量消耗植株体内的养分,减少向地下茎的输送供给,影响地下茎的膨大,造成只长叶,不长薯,最终导致低产劣质。如果在木薯地上茎叶快速生长期间,叶面喷洒多效唑,控制其疯长徒长,则能使木薯高产。
具体做法如下:
     在夏秋季节,每30~40天叶面喷洒一次750~1000倍多效唑水溶液,连喷2~3次,均匀喷湿所有的茎叶,以开始有水珠往下滴为宜。既能有效地控制木薯地上茎叶疯长、徒长,使茎干矮壮,叶片阔大而浓绿,叶肉厚,制造和积累养分多,供给地下茎膨大需要,使地下茎长、粗,淀粉多,产量高,品质好。若同时加入0.3%磷酸二氢钾、1500倍神农素螯合肥混合液同喷,效果更佳。既能增强多效唑的药效,又能从叶面上补充养分,提高植株的营养水平,促进养分积累,有利于木薯地下茎的伸长和膨大。
      选择良种:应用无病、无伤、密节的主茎作种。取20厘米为一段,用利刀在下端斩出斜口,斜口上8厘米处,切皮深度直到木质部,剥出皮长2厘米、茎围3/4的一个缺口,留出1/4的皮输送水分、养料。上到14厘米处,照样再切一个缺口,将种茎水平放在基肥穴中,盖上3—5厘米的泥土。这种新栽法,耐旱、抗风,不易翻根倒伏,且多层结薯,易于薯向前长粗、伸长。
 

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