| Effect of nitrogen management on yield and water and nitrogen utilization of sugar beet under regulated deficit irrigation |
|
View Fulltext View/Add Comment Download reader |
| |
| DOI：10.7606/j.issn.1000-7601.2020.06.22 |
| Key Words: regulated deficit irrigation drip irrigation sugar beet nitrogen management sugar yield |
| Author Name | Affiliation | | ZHOU Hongliang | College of Agronomy, Shihezi University, Shihezi, Xinjiang 832003, China | | ZHANG Lijuan | College of Agronomy, Shihezi University, Shihezi, Xinjiang 832003, China | | LIU Ningning | College of Agronomy, Shihezi University, Shihezi, Xinjiang 832003, China | | FEI Cong | College of Agronomy, Shihezi University, Shihezi, Xinjiang 832003, China | | SU Jixia | College of Agronomy, Shihezi University, Shihezi, Xinjiang 832003, China | | ZENG Zhouyuan | Turpan Experimental Middle School, Turpan, Xinjiang 838000, China | | FAN Hua | College of Agronomy, Shihezi University, Shihezi, Xinjiang 832003, China |
|
| Hits: 731 |
| Download times: 375 |
| Abstract: |
| Beta 356 was used as test material and the effects of three nitrogen (N) application rates and three top dressing ratios on sugar beet growth physiological characteristics, yield, and water and fertilizer use efficiency under regulated deficit irrigation were studied. The results showed that when 225 kg·hm-2 N fertilizer was applied on the basis of 50% and 30% of field water capacity (θf) under the regulated deficit irrigation at the canopy development and storage root development, respectively, the leaf area index (124.39%~143.87%) and chlorophyll content (23.03%~119.80%) were significantly increased by increasing the proportion of base fertilizer. Nitrogen application with 30%θf deficit regulation irrigation in sugar accumulation growth had little effect on leaf area index, but it was beneficial to increase chlorophyll content in leaves. The total amount of dry matter increased by 34.08%~56.84% and 32.43%~76.26%, respectively, in the storage root development and sugar accumulation growth compared with that in the control group, but the total amount of dry matter did not reach significant difference between the two treatments. The yield increased and decreased with increasing N application and the proportion of basic fertilizer, and the sugar content decreased with increasing N application. The agronomic efficiency and irrigation water use efficiency of N fertilizer were the highest under the treatment of N2T1, and the irrigation water use efficiency was increased by 82.50% compared with the control. The sugar yield and water\|sugar ratio of the two N application treatments were increased by 31.66%~63.41% and 31.82%~63.64%, respectively. Under the condition of regulated deficit irrigation, increasing N application was beneficial to increasing sugar yield, but the yield was not significant. When the proportion of basal fertilizer was 20%, that of canopy development was 60% and that of storage root development was 20%, sugar content and sugar yield of sugar beet were improved, and water\|sugar ratio and N utilization efficiency were higher. Therefore, the application of 150 kg·hm-2 N in the model of T1 (20∶60∶20) had a certain regulatory effect on regulated deficit irrigation. |
|
|
|