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大豆科学  2014 

氮密交互对大豆钾吸收的影响

DOI: 10.11861/j.issn.1000-9841.2014.06.0865, PP. 865-869

Keywords: 大豆,氮密交互,钾积累,产量

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Abstract:

以东农52大豆品种为材料,采用裂区设计,在施用等量氮(纯氮60kg.hm-2)条件下,设置2种氮肥施用方式(N1:氮肥作为基肥一次性施用;N2:启动N18kg.hm-2作为基肥+N42kg.hm-2?R4期追施)和3种种植密度(D1:20万株.hm-2;D2:25万株.hm-2;D3:30万株.hm-2),研究了氮密交互对大豆各器官钾积累及产量的影响。结果表明:R5期以后各器官钾积累总体上表现为:同一密度条件下,启动氮加追氮处理钾积累高于氮肥作基肥一次施用处理;同一氮肥施用方式下,随着密度增加,钾积累逐渐增加。在R6期,除叶柄外D2N2和D3N2处理各器官与D1N1处理钾积累差异均达到了显著水平。收获期籽粒中,D2N2和D3N2处理钾积累比D1N1处理分别高24.9%和23.5%(P<0.05)。D2N2处理产量最高,达到了3.96t..hm-2,较其他处理增产10.6%~36.6%(P<0.05)。

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