Modified fertilization management of summer maize (Zea mays L.) in northern China improves grain yield and efficiency of nitrogen use
| Autor: | Bin Zhao, Shuting Dong, Zhen-xiang Liu, Jiwang Zhang, Jie Zhao, Yi Cheng, Peng Liu, Zhi-jin Huo |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Ecology
Yield (finance) Crop yield Agriculture (General) Sowing Plant Science summer maize yield Biochemistry nitrogen use efficiency S1-972 modified fertilization management Human fertilization Food Animals Agronomy Soil water Animal Science and Zoology Dry matter Soil fertility Agronomy and Crop Science Cropping Food Science Mathematics |
| Zdroj: | Journal of Integrative Agriculture, Vol 14, Iss 8, Pp 1644-1657 (2015) |
| ISSN: | 2095-3119 |
| Popis: | Improving the yield of maize grain per unit area is needed to meet the growing demand for it in China, where the availability of fertile land is very limited. Modified fertilization management and planting density are efficient methods for increasing crop yield. Field experiments were designed to investigate the influence of modified fertilization management and planting density on grain yield and nitrogen use efficiency of the popular maize variety Zhengdan 958, in four treatments including local farmer's practice (FP), high-yielding and high efficiency cultivation (HH), super high-yielding cultivation (SH), and the control (CK). Trials were conducted in three locations of the Huang-Huai-Hai Plain in northern China. Compared with FP, SH was clearly able to promote N absorption and dry matter accumulation in post-anthesis, and achieve high yield and N use efficiency by increasing planting density and postponing the supplementary application of fertilizers. However, with an increase in planting density, the demand of N increased along with grain yield. Due to the input of too much N fertilizer, the efficiency of N use in SH was low. Applying less total N, ameliorating cultivation and cropping management practices should be considered as priority strategies to augment production potential and finally achieve synchronization between high yield and high N efficiency in fertile soils. However, in situations where soil fertility is low, achieving high yield and high N use efficiency in maize will likely depend on increased planting density and appropriate application of supplementary fertilizers postpone to the grain-filling stage. |
| Databáze: | OpenAIRE |
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