[1]李海珀,水清明,贾莉.氮肥减量配施生物炭对玉米根系生理及氮素去向的影响[J].江苏农业科学,2022,50(21):102-109.
 Li Haipo,et al.Effects of nitrogen fertilizer reduction combined with biochar on maize root physiology and nitrogen whereabouts[J].Jiangsu Agricultural Sciences,2022,50(21):102-109.
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氮肥减量配施生物炭对玉米根系生理及氮素去向的影响()

《江苏农业科学》[ISSN:1002-1302/CN:32-1214/S]

卷:
第50卷
期数:
2022年第21期
页码:
102-109
栏目:
遗传育种与耕作栽培
出版日期:
2022-11-05

文章信息/Info

Title:
Effects of nitrogen fertilizer reduction combined with biochar on maize root physiology and nitrogen whereabouts
作者:
李海珀1水清明2贾莉3
1.甘肃省定西市种子站,甘肃定西 743000; 2.甘肃省定西市农业科学研究院,甘肃定西 743000;3.甘肃省定西市农业技术推广站,甘肃定西 743000
Author(s):
Li Haipoet al
关键词:
生物炭玉米氮肥利用率根系形态15N同位素示踪
Keywords:
-
分类号:
S513.06
DOI:
-
文献标志码:
A
摘要:
采用盆栽试验,设置3个生物炭(BC)施用比例(0%、3%、6%)和3个氮(N)水平(100%、80%、60%),采用15N同位素标记及qT-PCR手段探索了氮肥减量配施生物炭对玉米相关根系生理及氮素去向的影响。结果表明,N减量复配BC各处理根系相关氮组分含量(NH+4-N、NO-3-N、NO-2-N、TN)表现不一,同一氮水平下,随着BC施用比例的增加,根系中的NO-3-N、NH+4-N皆呈增加趋势。BC0处理中,随着氮减施比例增加,玉米根系性状(体积、总根长、根系表面积、根系平均直径)、根系活性生理(根系活力、总吸收表面积、活跃吸收表面积、比表面积)及根系氮代谢基因(ZmGS1、ZmAS1)整体呈下降趋势,而施用BC整体促进了根系生长发育及代谢水平,以BC6处理整体表现较佳。各处理玉米氮肥利用率(NRE)为19.69%~29.42%,不添加BC处理(BC0)下,玉米NRE随着施氮量的降低而降低,施用BC条件下NRE及土壤残留率增加、氮素损失率显著降低,以BC6N80处理效果最优,其NRE显著提高765%~33.07%,氮素损失率显著降低19.46%~153.69%。
Abstract:
-

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备注/Memo

备注/Memo:
收稿日期:2022-05-17
基金项目:甘肃省科技计划(编号:21CX6NJ195)。
作者简介:李海珀(1980—),男,甘肃定西人,高级农艺师,研究方向为农业技术推广及种子管理。E-mail:lhp1383028@126.com。
更新日期/Last Update: 2022-11-05