机译:中国北方农牧交错带幼榆树带-南瓜带间作系统的生态效应
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Agronomy,;
Agricultural;
University;
ofHebei,;
Baoding;
071001,;
P.R.China;
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Resource;
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Ecological;
Environment;
Key;
Field;
Research;
Station,;
Ministry;
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Agriculture,;
Zhangjiakou;
076450;
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China;
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Plant;
Protection,;
Agricultural;
University;
of;
Hebei,;
Baoding;
071001,;
P.R.;
China;
间作系统; 带状间作; 榆树沟; 北方农牧交错带; 南瓜; 皮带; 生态效应; 中国;