| Effects of nitrogen management on nitrogen use efficiency and yield of sugar beet under drip irrigation in arid regions |
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| DOI：10.7606/j.issn.1000-7601.2018.01.11 |
| Key Words: sugar beet drip irrigation nitrogen application yield |
| Author Name | Affiliation | | SU Ji-xia | College of Agronomy, Shihezi University, Shihezi, Xinjiang 832003, China | | WANG Kai-yong | College of Agronomy, Shihezi University, Shihezi, Xinjiang 832003, China | | FEI Cong | College of Agronomy, Shihezi University, Shihezi, Xinjiang 832003, China | | LI Yang-yang | College of Agronomy, Shihezi University, Shihezi, Xinjiang 832003, China | | FAN Hua | College of Agronomy, Shihezi University, Shihezi, Xinjiang 832003, China |
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| Abstract: |
| The experiment was conducted to study the effects of nitrogen managem enton nitrogen use efficiency and yield of sugar beet under drip irrigation in arid regions, with the timing treatments of N1, N2, and N3. The results showed that dry matter accumulation of sugar beet increased from seedling to root enlargement stage, and then fell steadily. Nitrogen management had no significant effect on dry matter accumulation of sugar beet in seeding, leaf rapid growth stage and root enlargement stage, but there was a significant difference at sucrose accumulation stage and harvest stage. There is hysteresis between the N accumulation of sugar beet and the N rate. The total N accumulation and the translocation amount showed an order of N1＞N2＞N3＞CK, and the translocation rate of nitrogen as N1＞N2＞CK＞N3. The N agronomic efficiency and N apparent use efficiency was N2＞N3＞N1 and N3＞N2＞N1, respectively. N agronomic efficiency and N apparent use efficiency in the N2 treatment were 14% and 4% higher than that in the N1 and N3 treatment, and there was a significant difference among the treatments. The sugar yields were N3＞N2＞N1＞CK in the harvest, and the amount of K、Na and α-amino in root was CK＜N2＜N3＜N1. From the sugar yield and nitrogen use efficiency, the N3 (4∶4∶2) treatment can be used for reasonable nitrogen management mode of sugar beet under drip irrigation in North Xinjiang. |
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