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玉米追肥用什么肥好,玉米追肥期及追肥量推薦

發布時間:2021-06-22

      目前,大部分玉米已進入大喇叭口期,正是追肥的關鍵節點,今天我們就介紹一下玉米追肥的相關技術···

      玉米的大喇叭口期是追肥的關鍵時期。此時應選用高氮低磷中鉀(或高氮低磷低鉀)的復合肥。

1、漫灌玉米田

      在玉米大喇叭口期一次性追施高氮低磷中鉀(或高氮低磷低鉀)的復合肥,中等肥力地塊每畝追施20公斤左右。生產中,有的農戶習慣用尿素追施,再此建議配施少量磷鉀肥,中等肥力地塊每畝追施尿素20公斤左右、磷鉀肥各3-5公斤。具體施肥量可根據待施肥地塊的肥力高低狀況適當增減。

      一般種植面積小的,可采用人工刨坑深施,直接作用于玉米根部,然后覆土;種植面積較大的,可挖壟追肥,撒在壟溝里,然后覆土,這里注意,千萬不可直接撒施在地面上,造成嚴重浪費。

2、滴灌玉米田

      滴灌追肥,在提高玉米產量的同時還可提高肥料利用率。

      首次追肥:小喇叭口期-大喇叭口期,中等肥力地塊,畝追施N-P2O5-K2O=34-10-6(或接近配方)的配方肥4-5公斤(高、低肥力地塊增、減1-2公斤);

      第二次追肥:大喇叭口期-抽雄期,中等肥力地塊,畝追施N-P2O5-K2O=32-10-8(或接近配方)的配方肥5-6公斤(高、低肥力地塊增、減1-2公斤);

      第三次追肥:抽雄期-吐絲期,中等肥力地塊,畝追施N-P2O5-K2O=28-10-12(或接近配方)的配方肥5-6公斤(高、低肥力地塊增、減1-2公斤);

      第四次追肥:吐絲期-出穗期,中等肥力地塊,畝追施N-P2O5-K2O=27-8-15(或接近配方)的配方肥6-7公斤(高、低肥力地塊增、減1-2公斤);

      第五次追肥:灌漿前期,中等肥力地塊,畝追施N-P2O5-K2O=27-8-15(或接近配方)的配方肥6-7公斤(高、低肥力地塊增、減1-2公斤);

      第六次追肥:灌漿后期,中等肥力地塊,畝追施N-P2O5-K2O=27-8-15(或接近配方)的配方肥5-6公斤(高、低肥力地塊增、減1-2公斤)。

      注意:每次滴肥結合滴水進行。大量元素水溶肥料推薦施肥量要根據不同土壤肥力、不同玉米產量水平來確定。當土壤有機質含量為低水平時,推薦的的氮肥用量上浮10%。滴灌所用肥料必須符合水溶性肥料標準(NY1107-2010)的要求,肥料中水不溶物不能超過0.5%。

      (來源:火爆農化招商網)

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