《Table 6–Effects of N split applications on N uptake, N harvest index and apparent recovery efficien

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《Timing and splitting of nitrogen fertilizer supply to increase crop yield and efficiency of nitrogen utilization in a wheat–peanut relay intercropping system in China》

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Both N treatment and year showed significant effects on total N uptake of wheat and peanut，but neither crop showed a significant interaction of N treatment×year（Table 5）.The total N uptakes of wheat and peanut in all N-fertilized treatments were significantly increased by 32.7%–35.1%and56.1%–121.9%，compared to those in N0 over the two years.For wheat，total N varied from 178.2 to 240.6 kg ha-1in 2016 and from 195.1 to 263.8 kg ha-1in 2017.However，there were no significant differences among the N1，N2，and N3 treatments in 2016 and between the N1 and N3 treatments in 2017.For peanut，total N uptake ranged from 83.8 to 181.0 kg ha-1in2016 and from 76.0 to 173.6 kg ha-1in 2017，and there were significant differences among all the treatments（Table 6）.Averaged for the N treatment，the total N uptake was 9.5%higher in wheat and 6.8%lower in peanut in 2017 than in 2016.