| Effects of nitrogen, phosphorus, potassium and their combined application on nutrient absorption and utilization of seed maize |
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| DOI：10.7606/j.issn.1000-7601.2020.02.31 |
| Key Words: maize seed production N, P, K fertilizer combined application of fertilizer yield fertilizer utilization efficiency |
| Author Name | Affiliation | | GUO Shiqian | Cultivated Land Quality and Construction Protection Station of Gansu，Lanzhou, Gansu 730020, China | | CUI Zengtuan | Cultivated Land Quality and Construction Protection Station of Gansu，Lanzhou, Gansu 730020, China | | SHI Weijie | Zhangye Ganzhou District Agricultural Technology Promotion Center, Zhangye, Gansu 734000, China | | CHENG Hongyu | College of Agriculture and Ecological Engineering, Hexi University, Zhangye, Gansu 734000, China | | XIAO Rang | Civil Engineering College, Hexi University, Zhangye, Gansu 734000, China | | XIAO Zhanwen | College of Agriculture and Ecological Engineering, Hexi University, Zhangye, Gansu 734000, China | | ZHAO Yunchen | College of Agriculture and Ecological Engineering, Hexi University, Zhangye, Gansu 734000, China | | CAO Jianzu | College of Agriculture and Ecological Engineering, Hexi University, Zhangye, Gansu 734000, China |
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| Abstract: |
| A randomized block experiment was conducted to study the effects of nitrogen (N), phosphorus (P), and potassium (K) and their combined application on nutrient absorption, fertilizer utilization efficiency, and yield of seed maize production. The experiment included no fertilizer (CK), N deficiency (PK), P deficiency (NK), K deficiency (NP), combination N, P, and K (NPK). The results showed that the combined N, P, and K application obviously promoted biomass accumulation and yield of maize seed production, the yield of NPK treatment reached 9 834.0 kg·hm-2, the yields of N deficiency (PK), P deficiency (NK), and K deficiency (NP) treatments decreased by 6.06%, 10.07%, and 4.88%, respectively, compared with NPK treatment. The limiting factors of yield were P, N, and K in order. The utilization efficiency of N, P, and K fertilizer under NPK treatment were 22.64%, 26.82%, and 60.10%, respectively. The agronomic efficiency of N, P, and K fertilizer was 1.33 kg·kg-1 of N, 7.17 kg·kg-1 of P2O5, and 6.66 kg·kg-1 of K2O, respectively. Therefore, we should pay attention to the application of P and K fertilizer and strengthen the management of N fertilizer for maize seed production in Hexi region. |
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