| Effects of different ratios of nitrate to ammonium on dry matter accumulation and yield of maize planting in furrows under alternating narrow and wide ridges completely mulched |
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| DOI：10.7606/j.issn.1000-7601.2017.03.31 |
| Key Words: different ratios of nitrate to ammonium maize planting in furrow under alternating narrow and wide ridges completely mulched dry matter accumulation grain yield |
| Author Name | Affiliation | | LI Chun-chun | College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | GAO Yu-hong | College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China
Gansu Provincial Key Lab of Arid Land Crop Science, Lanzhou, Gansu 730070, China | | GUO Li-zhuo | College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China
Gansu Provincial Key Lab of Arid Land Crop Science, Lanzhou, Gansu 730070, China | | LIU Hong-sheng | Huining Agricultural Husbandry Bureau, Huining, Gansu 730799, China | | LU Ya-dan | College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | YANG Ping | College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | YANG Tian-qing | College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China |
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| Abstract: |
| Field experiment was used to study the effects of different ratios of nitrate to ammonium on dry matter accumulation and yield formation of maize planting in furrows under alternating narrow and wide ridges completely mulched. NO3--N/NH4+-N was in the ratios of 1∶0(N1), 1∶1(N2), 1∶2(N3), 1∶3(N4), 2∶1(N5) and 3∶1(N6). Photosynthetic characteristics, dry matter accumulation and grain yield were determined under different treatments. The results showed that the NO3--N and NH4+-N mixture ratio could increase leaf area and photosynthetic potential of maize compared with the single nitrogen form. Among them, the fertilizer ratio of 3∶1(N6) was the best treatment, the leaf area and photosynthetic potential of maize was increased 12.59%～39.85%、13.71%～25.00%, respectively, compared with the N1. Increasing the proportion of nitrate fertilizer improved photosynthetic performance, and then promoted dry matter accumulation and yield formation. Mixed supply of nitrate and ammonium fertilizer significantly promoted maize growth and development, the dry matter accumulation and yield were higher 5.45%～52.74% and 3.85%～9.93% than that of the single NO3--N. N6 was the best treatment which had the highest dry matter accumulation and grain yield, which increased by 17.13% and 4.73% than those of other treatments. |
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