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徐州制定小麥化肥減量增效技術意見

2022-11-09 09:29:38 來源：江蘇省徐州市農(nóng)機推廣站 閱讀量：20190 評論

　　【農(nóng)機網(wǎng) 地方農(nóng)機】在確保小麥高產(chǎn)穩(wěn)產(chǎn)的前提下，科學施用化肥，減少化肥使用量對保護生態(tài)環(huán)境和糧食安全意義重大。小麥減量施肥技術要點如下：
 
　　1、精準施肥(測土配方施肥)
 
　　通過土壤測定了解土壤養(yǎng)分情況，根據(jù)小麥需肥規(guī)律和目標產(chǎn)量確定施肥量、肥料運籌和施肥時間。對于目標產(chǎn)量在700公斤/畝以上的高產(chǎn)田塊，畝施氮22—24公斤，五氧化二磷10—12公斤，氧化鉀10—15公斤，其中氮肥50%作基肥(底肥)，50%在拔節(jié)孕穗期、基部第一節(jié)間定長后追施，磷、鉀肥作基肥施用，另每畝施用鋅肥2公斤。后期葉面噴施磷酸二鉀1公斤(噴施濃度0.2%)。目標產(chǎn)量在600—700公斤/畝的田塊，畝施氮18—22公斤，五氧化二磷8—12公斤，氧化鉀10—15公斤，其中氮肥50%作基肥(底肥)，50%在拔節(jié)孕穗期、基部第一節(jié)間定長后追施，磷、鉀肥作基肥施用，另每畝施用鋅肥2公斤。后期葉面噴施磷酸二鉀1公斤(噴施濃度0.2%)。目標產(chǎn)量在500—600公斤/畝的田塊，畝施氮16—20公斤，五氧化二磷8—10公斤，氧化鉀8—12公斤，其中氮肥60%作基肥(底肥)，40%在拔節(jié)孕穗期、基部第一節(jié)間定長后追施，磷鉀肥作基肥施用，另每畝施用鋅肥2公斤。后期葉面噴施磷酸二鉀1公斤(噴施濃度0.2%)。目標產(chǎn)量在400—500公斤/畝的田塊，畝施氮14—17公斤，五氧化二磷8—10公斤，氧化鉀8—10公斤，其中氮肥60%作基肥(底肥)，40%在拔節(jié)孕穗期、基部第一節(jié)間定長后追施，磷鉀肥作基肥施用，另每畝施用鋅肥2公斤。后期葉面噴施磷酸二鉀1公斤(噴施濃度0.2%)。目標產(chǎn)量在400公斤以下的田塊，畝施氮13—16公斤，五氧化二磷8—10公斤，氧化鉀6—8公斤，其中氮肥70%作基肥(底肥)，30%在拔節(jié)孕穗期、基部第一節(jié)間定長后追施，磷、鉀肥作基肥施用。后期葉面噴施磷酸二鉀1公斤(噴施濃度0.2%)。
 
　　2、有機肥部分替代化肥
 
　　增施符合有機肥料行業(yè)標準(NY/T 525)的商品有機肥或充分腐熟的糞肥，每增施100公斤，可分別減少施用化學氮、五氧化二磷、氧化鉀1—1.5公斤。
 
　　3、秸稈還田
 
　　對前茬稻草盡可能粉碎、撒勻，耕翻還田，每還田稻草100公斤，可分別減少施用化學氮、五氧化二磷、氧化鉀0.5公斤。注意基肥增施氮肥2—3公斤以調節(jié)碳氮比，后期在追肥時扣除。
 
　　4、施用微生物肥料
 
　　施用功能微生物肥料可促進土壤養(yǎng)分轉化和釋放，增強小麥對養(yǎng)分、水分的吸收，增強小麥對病害的抗性，減少5%左右化肥使用量。
 
　　5、使用緩/控釋肥料
 
　　選擇施用小麥專用的緩/控釋肥料。小麥苗期對養(yǎng)分需求和吸收量較少，肥料養(yǎng)分釋放量也較少，返青拔節(jié)期后，小麥養(yǎng)分需求和吸收量快速增加，肥料養(yǎng)分釋放也快速增加，即肥料養(yǎng)分釋放與小麥對養(yǎng)分吸收同步，可有效減少養(yǎng)分損失，提高利用率，相應減少化肥施用量。
 

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