Journal of Food, Agriculture and Environment

Fate of water and N nutrient in tobacco field under different water-nitrogen coupling treatments

Author(s):

Xiao-hou Shao ^{1, 2*}, Jing-nan Chen ^{2, 3}, Mao-mao Hou ^{2, 3}, Yao-fu Wang ¹, You-bo Yuan ⁴, Fu-zhang Ding ⁴

Recieved Date: 2013-07-11, Accepted Date: 2013-10-12

Abstract:

The fate of water and fertilizer N in tobacco fields was observed and analyzed under the condition of lysimeter experiments. Results showed that the proportion of plant transpiration (y₁), soil evaporation (y₂) and soil water storage variation (y₃) accounted for the total water consumption was 60.29%-77.63%, 20.25%-37.83% and 1.49%-2.33% respectively, presenting an exponential relationship with the irrigation amount by the formula of y₁= 26.55 exp (0.0026x), y₂= 305.73 exp (0.0007x) and y₃= 4.53 exp (0.0015x). The average fertilizer N uptake proportion of upper leaf, middle leaf and lower leaf of tobacco plant was 21.96%, 24.07% and 30.09% separately. Fertilizer N remained in soil accounted for more than 60% of the total fertilizer N application in season, which was decreased with the depth of soil layer. N loss was relatively less and significantly related to amount of N fertilizer application, with highest of T6 recorded as 24.6 kg hm^-2, it seemed that both the highest irrigation amount and N application amount could lead to an easy leaching of fertilizer N.

Keywords:

Tobacco-planted field, water and N nutrient balance, water-nitrogen coupling, lysimeter experiment

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Journal: Journal of Food, Agriculture and Environment
Year: 2013
Volume: 11
Issue: 3&4
Category: Agriculture
Pages: 1420-1423

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