Effects of Starter-N plus Top-dressing N on Nitrogen Absorption of Soybean Plants under Different Densities(PDF)
《大豆科学》[ISSN:1000-9841/CN:23-1227/S]
- Issue:
- 2013年04期
- Page:
- 506-511
- Research Field:
- Publishing date:
Info
- Title:
- Effects of Starter-N plus Top-dressing N on Nitrogen Absorption of Soybean Plants under Different Densities
- Author(s):
- ?SUN Wen-xiang; ZHANG Ming-cong; LIU Yuan-ying; WU Qiong; ZHAO Jing
- ?College of Resources and Environmental Science,Northeast Agricultural University,Harbin 150030,China
- Keywords:
- Soybean; Density; Starter-N plus top-dressing N; N accumulation; Yield
- PACS:
- S565.1
- DOI:
- 10.11861/j.issn.1000-9841.2013.04.0506
- Abstract:
- ?A split-plots designed field experiment with three densities and three N treatments using soybeancv.Dongnong 52 was conducted to study the effects of starter-N plus top-dressing N on N absorption of soybean under different densities.Results showed that N accumulation and contribution rate of N assimilation after R5 of starter-N plus top-dressing N treatment increased significantly compared to those of using N only as basal fertilizer under same density.N accumulation after R5 of starter-N plus top-dressing N at R4 was 109.5% higher than using N only as basal fertilizer(P<0.01)under the density of 250 000 plants·ha-1.When N was equally applied among treatments,N accumulation before R5 increased with higher density,but N accumulation after R5 of starter-N plus top-dressing N at R4 under the density of 250 000 plants·ha-1 was 27.4% and16.0% higher(P<0.05)than 200 000 and 300 000 plants·ha-1,respectively.The highest yield was achieved by starter-N plus top-dressing N at R4,yield of which was 9.1%-25.6% higher than other treatments(P<0.05).
Last Update: 2014-02-20