Effects of Nitrogen Fertilizer on Grow th and Water U se Efficiency of M aize in Sandy-loam Alluvial Soil
YANG Yonghui
WU Jicheng
WANG Hongqing
ZHAO Lijun
GUO Qing
Abstract：In order to ascertain the characteristics of growth and water utilization of maize under different amount of nitrogen fertilizer ,a field experiment was conducted to investigate the effect of nitrogen fertilizer with dosage of 0 kg/ha (CK) ,90 kg/ha (N1) ,180 kg/ha(N2) ,270 kg/ha (N3) ,360 kg/ha(N4) ,450 kg/ha(N5) ,540 kg/ha(N6)on soil moisture ,maize agronomic charac-ters ,production elements ,yield and water utilization .The results indicated that application of ni-trogen fertilizer ,especially 450 kg/ha increased the upper soil water content ,and promted the maize root deep growth ,so the maize could rse more deep soil water .The corn morphological inde-xes of the treatment with 450 kg/ha nitrogen in different grow th period had better performance , and the production elements such as ear length ,ear coarse ,ear number of rows ,row grains were higher compared with CK .With the increase of nitrogen rate ,maize yield increased significantly , but when nitrogen fertilizer was higher than 450 kg/ha ,the increase rate of maize yield decreased obviously .And water use efficiency first increased and then dropped with the increase of nitrogen . The water use efficiency (WUE) of the treatment with 450 kg/ha nitrogen was highest and the yield (12 093 .0 kg/ha)and WUE ([24 .4 kg/(mm · hm2 )]) were 70 .7% and 78 .1% higher than CK .It was concluded that the treatment with 450 kg/ha nitrogen was the most promising option .
Keywords：nitrogen fertilizermaizeyield componentsyieldwater use efficiency
Publication Date：2013-10-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：5( 55-58,69 )