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2024年秋冬季設施黃瓜科學施肥指導意見
2024-10-15
08:36:36
來源:全國農技推廣中心 閱讀量:12442
評論
施肥原則
針對其生產中存在的過量灌溉和施肥,施肥比例不合理,施用的有機肥多以畜禽糞為主導致養分比例失調和土壤生物活性降低,以及連作障礙等導致土壤質量退化嚴重,養分吸收效率下降,蔬菜品質下降等問題,提出以下施肥原則:
1、合理施用有機肥,提倡施用優質有機肥(推薦用植物源有機肥),老菜棚注意多施高碳氮比外源秸稈或有機肥,少施禽糞肥。
2、根據作物產量、茬口及土壤肥力條件,綜合考慮有機肥施用量、土壤養分供應,適當調整氮磷鉀化肥用量。
3、推薦采用水肥一體化技術,遵循“少量多次”的灌溉施肥原則。
4、根據不同生育期養分需求,氮肥和鉀肥主要作追肥,少量多次施用,避免追施磷含量高的復合肥,苗期不宜頻繁追肥,重視結瓜期追肥。
5、土壤酸化嚴重時應適量施用石灰等酸性土壤調理劑。
6、施肥與高產栽培結合,選育高產耐密品種,提高育苗質量,采用合理種植密度,選擇適宜播期/移栽期。
施肥建議
1、基肥施用充分腐熟的優質農家肥3—4方/畝,或者優質商品有機肥(含生物有機肥)300—400公斤/畝,推薦施用高碳/磷比的商品有機肥。
2、產量水平14000—16000公斤/畝,氮肥(N)32—36公斤/畝,磷肥(P2O5)12—14公斤/畝,鉀肥(K2O)33—38公斤/畝。
3、產量水平11000—14000公斤/畝,氮肥(N)27—32公斤/畝,磷肥(P2O5)10—12公斤/畝,鉀肥(K2O)28—33公斤/畝。
4、產量水平7000—11000公斤/畝,氮肥(N)22—27公斤/畝,磷肥(P2O5)9—11公斤/畝,鉀肥(K2O)23—28公斤/畝。
5、產量水平4000—7000公斤/畝,氮肥(N)17—22公斤/畝,磷肥(P2O5)7—9公斤/畝,鉀肥(K2O)18—33公斤/畝。
6、全部有機肥作基肥施用,60%以上的磷肥、20%—30%氮鉀肥作基肥施用,施肥方式為條(穴)施,其余氮鉀肥在初花期和結瓜期按養分需求分6—8次追施,其余的磷肥隨氮鉀肥追施,每次追施氮肥用量不超過5公斤/畝。秋冬茬和冬春茬的氮鉀肥在初花期和結瓜期分6—7次追肥,越冬長茬的氮鉀肥在初花期和結瓜期分8—11次追肥。雨水充沛的區域,提倡施用含脲酶抑制劑、硝化抑制劑的氮肥。在低溫、寡照等極端環境下,可施用含氨基酸、黃腐酸、海藻酸等功能性物質的肥料,促根同時增強作物抗逆性。如果采用滴灌施肥技術,可減少20%左右的化肥施用量,采取少量多次的原則,灌溉施肥次數在15次左右。
7、適當補充鈣、鎂、硼肥。可基施石灰(鈣肥)50—75公斤/畝、無水硫酸鎂(鎂肥)4—6公斤/畝。在開花期至盛果期葉面噴施2—3次0.1%硼肥水溶液、2—4次螯合態鈣肥和硫酸鎂肥。
來源:農業農村部種植業管理司、全國農業技術推廣服務中心、農業農村部科學施肥專家指導組
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