^pCenter;
of;
Circular;
Agriculture;
China;
Agricultural;
University;
Beijing;
100193;
P.R.China;
^pField;
Scientific;
Observation;
Station;
of;
Zhengzhou;
Fluvo-Aquic;
Soils;
Ecology;
Environment;
Ministry;
of;
Agriculture~Institute;
of;
Plant;
Nutrition;
Resources;
and;
Environment;
Henan;
Academy;
of;
Agricuhural;
Science;
Zhengzhou;
450002;
P.R.China;
^pScience;
Research;
Center;
University;
of;
Calabar;
PMB;
1115;
Nigeria;
硝酸盐积累; 间作系统; 氮素淋失; 夏玉米; 超剂量; 氮肥施用量; CGT; 田间试验;