Yield and nitrogen balance in corn grown under no-tillage system

被引：0
|
作者：
Silva, Helton de S. [1 ]
de Souza, Adailson P. [1 ]
de Carvalho, Mary A. B. [1 ]
da Silva, Valeria B. [1 ]
Barbosa, Ewerton da S. [2 ]
dos Santos, Michelly F. [2 ]
机构：
[1] Univ Fed Paraiba, Ctr Ciencia Agr, Programa Posgrad Ciencia Solo, Areia, PB, Brazil
[2] Univ Fed Paraiba, Ctr Ciencia Agr, Areia, PB, Brazil
来源：
REVISTA BRASILEIRA DE ENGENHARIA AGRICOLA E AMBIENTAL | 2020年 / 24卷 / 11期
关键词：
Zea mays; fertilization efficiency; nitrogen fertilization; nitrogen in the soil; FERTILIZATION; MAIZE;
D O I：
10.1590/1807-1929/agriambi.v24n11p728-734
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
The corn crop is highly responsive to nitrogen fertilization; however, the application of high doses generally causes a reduction in the use efficiency of fertilizer. In this sense, this study aimed to determine the yield and nitrogen balance in corn grown under the no- tillage system. The experiment consisted of the application of four nitrogen doses (0, 30; 70 and 95 kg ha(-1)). In all plots with the AG 1051 hybrid corn, 80 and 56 kg ha(-1) of P2O5 and K2O were applied, respectively. The experiment was arranged in a randomized block design with five replications. The grain yield had a linear increasing behavior according to the nitrogen doses, which reached 5,684.79 kg ha(-1) . The fertilization efficiency and the N extraction increased linearly with the increase of the nitrogen doses, obtaining with the highest dose the extraction of 114.93 kg ha(-1) of N and a fertilization efficiency of 65%. The soil N stock of 4,489 kg ha(-1) provides corn plants with 52.81 kg ha(-1) of this nutrient. Corn adjusts the biomass production according to the availability of nitrogen, with no effect of N doses on the nutrient content in plant tissues.
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页码：728 / 734
页数：7
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