文档介绍：作物学报 ACTA AGRONOMICA SINICA 2011, 37(1): 152157 /
nzhou city of Shandong province.
The results showed that compared with farmers traditional fertilization, maize grain yields of optimized nitrogen management
were increased by %–%, averaged %, nitrogen rates were reduced by %–%, averaged %, nitrogen
uptake efficiencies were increased by %–%, nitrogen recovery efficiencies were increased by %–%, ni-
trogen agronomy efficiencies were increased by %–%, nitrogen partial factor productivities were increased by
%–%, value cost ratios were increased by %–%. It suggested that in-season nitrogen management strategy
based on soil nitrate nitrogen test could reduce maize nitrogen rate, increase nitrogen use efficiency, improve grain yield and value
cost ratio.
Keywords: Maize; Nitrate nitrogen; Yield; Nitrogen use efficiency
玉米是需氮较多的作物, 生产中氮肥投入也不欧盟规定大田作物收获后 0~90 cm 土层硝态氮
断增加。山东济宁市、泰安市氮肥投入在 400 kg hm2 残留不应超过 90~100 kg hm2[8], 而基于土壤无机氮
左右[1]; 河南省平均用量为 kg hm2[2], 在典型或硝态氮测试的氮肥推荐策略已成为欧美国家协调
高产区则为 ~ kg hm2 之间, 平均用量达产量与环境目标的主要方法[9-10]。黄生斌