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锌与氮磷肥配合喷施对冬小麦锌累积及锌肥利用率的影响
李宏云1, 王少霞1, 李 萌,等1
西北农林科技大学 资源环境学院,农业部 西北植物营养与农业环境重点实验室
摘要:
【目的】在不同栽培模式及施氮量条件下,研究锌分别与氮、磷肥配合喷施对冬小麦锌吸收、转运率及锌肥利用率的影响。【方法】于2010-10-2012-06,以冬小麦小偃22为供试材料,采用2年田间定位试验,设置了3种栽培模式(常规、覆膜、补灌),3个施氮水平(0,120,240 kg/hm2),4个喷肥处理(喷蒸馏水(CK)、喷Zn、喷Zn+N、喷Zn+P),分析不同栽培模式及氮肥用量下锌分别与氮、磷肥配合喷施后小偃22各器官锌含量、籽粒和秸秆锌携出量、籽粒锌转运率以及锌肥利用率的变化。【结果】与常规和覆膜栽培模式相比,补灌模式提高了籽粒和秸秆锌的携出量,覆膜可提高籽粒锌转运率。与不施氮相比,土施氮肥明显提高了小麦籽粒、茎秆和叶片锌含量及锌肥料利用率,而土施氮肥明显降低了籽粒锌转运率。与CK相比,喷锌处理(喷Zn、喷Zn+N、喷Zn+P)明显提高了小麦籽粒锌含量及锌携出量,各喷锌处理表现为喷Zn+N、喷Zn>喷Zn+P>CK,其中喷Zn+N处理小麦籽粒锌含量提高幅度平均为92%;喷锌处理也明显提高了茎秆、叶片及颖壳锌含量及秸秆锌携出量。喷锌处理锌转运率总体上均明显降低。喷Zn+P处理的锌肥利用率与喷Zn、喷Zn+N处理相比明显降低。同时,不同年份籽粒锌含量、锌转运率及锌肥利用率也存在明显差异。【结论】在补灌栽培模式下,施氮量为120 kg/hm2时,单独喷施锌肥或锌与氮肥配合喷施,是潜在缺锌土壤区提高小麦籽粒锌含量和锌肥利用率的有效措施。
关键词:  叶面喷锌  土施氮肥  栽培模式  锌吸收  锌肥料利用率  冬小麦
DOI:
分类号:
基金项目:国家自然科学基金项目(41371288);西北农林科技大学基本科研业务费专项资金重点项目(QN2011074)
Effects of combined foliar Zn application with N or P on Zn accumulation of winter wheat and fertilizer utilization efficiency
LI Hong-yun,WANG Shao-xia,LI Meng,et al
Abstract:
【Objective】A field experiment was conducted to investigate the effect of foliar Zn combined with N or P on absorption and translocation of Zn in winter wheat and Zn fertilizer utilization efficiency under different cultivation patterns and soil N application rates.【Method】The experiment included three cultivation patterns (conventional planting,film mulching,and supplemental irrigation),three N application treatments (N0,N120 and N240),and four foliar application treatments (CK,foliar Zn,foliar Zn combined with N,and foliar Zn combined with P).From October 2010 to June 2012,Xiaoyan 22 variety was used for the 2 years field test.【Result】Compared to conventional planting,supplemental irrigation significantly increased grain Zn absorption,and film mulching increased Zn translocation.Compared to N0 treatment,N120 and N240 significantly increased Zn absorption and translocation as well as Zn fertilizer utilization efficiency.Soil N application significantly reduced Zn translocation in wheat.Compared to the control (foliar application of water),foliar fertilization treatments significantly increased grain Zn absorption with the decreasing order of foliar Zn combined with N≥foliar Zn>foliar Zn combined with P>CK.Grain Zn concentration was increased by 92% in the foliar Zn combined with N treatment.Meanwhile,foliar Zn treatments also significantly increased Zn concentration and uptake in straw (i.e.stems,leaves,and glumes).On the contrast,foliar Zn treatments significantly reduced Zn translocation in wheat.Compared to foliar Zn or foliar Zn combined with N treatments,foliar Zn combined with P treatment significantly reduced Zn fertilizer utilization efficiency.The grain Zn absorption and Zn fertilizer utilization efficiency were also significantly affected by growing season.【Conclusion】In conclusion,foliar Zn combined with N plus N120 treatment was an effective method to increase Zn absorption and Zn fertilizer utilization efficiency in potentially Zn-deficient calcareous soil.
Key words:  foliar Zn  soil N application  cultivation pattern  Zn absorption  Zn fertilizer utilization efficienc  winter wheat