| Effects of cultivation patterns and nitrogen fertilization on mineral nitrogen and yield of dryland spring maize |
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| DOI：10.7606/j.issn.1000-7601.2016.01.16 |
| Key Words: cultivation patterns amount of nitrogen application nitrate yield apparent loss of nitrogen fertilizer nitrogen use efficiency |
| Author Name | Affiliation | | ZHANG Yue | College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China | | YUE Shan-chao | State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau,Northwest A&F University, Yangling, Shaanxi 712100, China | | LI Ting | College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China | | LI Shi-qing | College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau,Northwest A&F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| A field experiment was carried out to study the effects of different cultivation patterns (the whole film double furrow mode and traditional planting pattern) and nitrogen application rate (0, 170, 200, 230 kg·hm-2) on the soilmineral nitrogen and grain yield of spring maize. The results showed that in the 0～200 cm soil profile, soil nitrate content was decreased as the depth of soil layers increased and the soil nitrate was mainly distributed in the 0～40 cm soil profile. With the increase of nitrogen application, soil nitrate content became increased. Different cultivation patterns had significant influences on the distribution of nitrate in soil. Compared to the traditional planting pattern, the whole film double furrow planting pattern reduced the soil nitrate due to the ability improvement of the plant N uptake from the soil. The N uptake of treatment N0, N170, N200, N230 were increased by 89.3%, 51.1%, 66.6% and 102.8%, with an average of 77.4%. In contrast to the soil nitrate, the ammonium in the soil was changed very slightly and was not affected by the amount of nitrogen application, cultivation patterns or different growth stages of spring maize. Compared to the traditional planting pattern, the whole film double furrow planting pattern could significantly improve grain yield and plant N uptake. In summary, the optimum nitrogen application rate of the whole film double furrow mode was 200 kg·hm-2, while the traditional planting pattern was 170 kg·hm-2. In conclusion, the whole film double furrow mode was more suitable for spring maize in dryland regions. |
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