| Effects of deep application of nitrogen fertilizer on soil nutrient content and spring maize yield in dryland film mulched farmland |
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| DOI：10.7606/j.issn.1000-7601.2023.05.10 |
| Key Words: maize deep application of nitrogen fertilizer film\|mulching soil nutrients yield |
| Author Name | Affiliation | | GAO Fei | Cultivated Land Quality and Construction Protection Station of Gansu, Lanzhou, Gansu 730020, China | | REN Liangqi | College of Agronomy, Northwest A & F University, Yangling, Shaanxi 712100, China
Key Laboratory of Crop Physiology, Ecology and Tillage in Northwest Loess Plateau, Minister of Agriculture and Rural Affairs, Yangling, Shaanxi 712100, China | | CUI Zengtuan | Cultivated Land Quality and Construction Protection Station of Gansu, Lanzhou, Gansu 730020, China | | GUO Shiqian | Cultivated Land Quality and Construction Protection Station of Gansu, Lanzhou, Gansu 730020, China | | ZHENG Jie | Cultivated Land Quality and Construction Protection Station of Gansu, Lanzhou, Gansu 730020, China | | YE Xu | College of Agronomy, Northwest A & F University, Yangling, Shaanxi 712100, China
Key Laboratory of Crop Physiology, Ecology and Tillage in Northwest Loess Plateau, Minister of Agriculture and Rural Affairs, Yangling, Shaanxi 712100, China | | WANG Yuhao | College of Agronomy, Northwest A & F University, Yangling, Shaanxi 712100, China
Key Laboratory of Crop Physiology, Ecology and Tillage in Northwest Loess Plateau, Minister of Agriculture and Rural Affairs, Yangling, Shaanxi 712100, China | | ZHANG Peng | College of Agronomy, Northwest A & F University, Yangling, Shaanxi 712100, China
Key Laboratory of Crop Physiology, Ecology and Tillage in Northwest Loess Plateau, Minister of Agriculture and Rural Affairs, Yangling, Shaanxi 712100, China |
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| Abstract: |
| A field experiment with three nitrogen fertilizer application depths (D5: 5 cm, D15: 15 cm, and D25: 25 cm) and no nitrogen (N0) under double ridge and furrow plastic film mulching planting was carried out in Dingxi City, Gansu Province in 2021-2022. The effects of different nitrogen fertilizer application depths on soil nutrient content, dry matter accumulation, water use and maize yield were analyzed in order to provide a theoretical basis for optimizing fertilizer application mode and further improve its water\|saving and yield\|increasing efficiency. The results showed that with the increase of fertilization depth, the soil nutrient content in 0~40 cm was gradually increased. Compared with D15 and D5, the soil organic carbon, total nitrogen, available phosphorus and available potassium contents under D25 treatment were increased by 8.67%, 2.23%, 22.11% and 15.18%, respectively. The dry matter accumulation of maize was also significantly increased with the increase of fertilization depth, and D25 was 6.53% and 25.30% higher than D15 and D5 from 105 d after sowing to harvest, respectively. Each depth of fertilization treatment increased the water consumption and water use efficiency (P<0.05), which both gradually increased with the increase of fertilization depth. Compared with D5, the biomass and economic yield of maize under D25 were increased by 27.20% and 34.93%, respectively. These results showed that nitrogen fertilizer application at 25 cm depth can effectively improve soil nutrient content and water use efficiency, which is an effective measure to improve the maize yield under film\|mulched farmland in northwest of China. |
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