Comparisons of D-Value Method and ¹⁵N-tracing Method on Calculating the Nitrogen Fertilizer Utilization Efficiency of Flue-Cured Tobacco

Abstract:

Nitrogen utilization efficiency (NUE) was a hot topic in the study area of crop cultivation, most scholars tented to calculate NUE by D-value method, which could well reflected the total absorption of N nutrient by crops; and on the other hand, the tracing technique could precisely calculated the N content which crops absorbed from N fertilizer. In this study, the flue-cured tobaccos were treated with 2 N levels and 3 water levels, and the D-value method and the tracing method was adopted to calculate the nitrogen utilization efficiency. Results showed that the R_D value was more than double the R_N value, and there were no relationships between the results calculated by the D-value method and the tracing method, the treatment with higher R_N value could not always obtain a higher R_D value; besides, water deficiency or excess could both decreased NUE, through affecting the N availability or through the elution of the N nutrient. Taken as the whole, 6g/plant N combined with 800mm irrigation water was more beneficial for the effective utilization of N fertilization, and which combined with 1000mm was more beneficial for the N accumulation of tobacco plants.

• Periodical: Advanced Materials Research (Volumes 726-731)
• Pages: 1457-1462
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.726-731.1457
• Online since: August 2013
• Authors: Mao Mao Hou, Xiao Hou Shao, Jing Nan Chen, You Bo Yuan, Fu Zhang Ding, Yao Fu Wang
• Keywords: D-Value Method, Nitrogen Utilization Efficiency, Tobacco, Tracing Method

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