Open AccessEffects of nitrogen application on growth and yield of maize
Author(s) -
Xiaoqing Han,
Na Han,
Qingyun Zhou,
Jie Kang,
Xueshi Bai
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/304/5/052054
Subject(s) - nitrogen , dry matter , yield (engineering) , leaf area index , agronomy , nitrogen fertilizer , field experiment , fertilizer , human fertilization , mathematics , chemistry , biology , physics , organic chemistry , thermodynamics
The effects of different nitrogen application levels on growth, dry matter accumulation, SPAD value, leaf area index and yield of maize were studied to provide theoretical basis for rational and efficient nitrogen application management of crops. In the field experiment, 225, 337.5, 450, and 675 kg ·hm −2 nitrogen application levels were set, respectively expressed by N 1 , N 2 , N 3 , and N 4 . N 0 without nitrogen fertilizer was used for the control experiment. During the growing period, plant height, leaf area index and SPAD were observed, and dry matter accumulation, yield and yield components were counted. The growth index, dry matter accumulation, yield and yield components of maize were influenced by different fertilization levels. When the nitrogen application amount is greater than 225 kg · hm −2 , it could significantly promote the growth and development of corn and increase the yield. Through comparative analysis, it was concluded that when the nitrogen application amount was 280kg·hm −2 , it was the optimal nitrogen application amount for the efficient production of corn in the experimental area.