[1]WU Xiaoli,HE Longyun,YAO Jingjing,et al.The Effect of Different Nitrogen Levels on Soybean Yield and Fertilizer Use Efficiency in New Farmland[J].Research of Soil and Water Conservation,2016,23(02):106-110,116.
Copy
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
23
Number of periods:
2016 02
Page number:
106-110,116
Column:
Public date:
2016-04-28
- Title:
-
The Effect of Different Nitrogen Levels on Soybean Yield and Fertilizer Use Efficiency in New Farmland
- Author(s):
-
WU Xiaoli1, HE Longyun2, YAO Jingjing2, DANG Hongzhong1, ZHANG Youyan1, ZHOU Zefu1
-
1. Institute of Desertification Studies, Chinese Academy of Forestry, Beijing 100091, China;
2. College of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China
-
- Keywords:
-
loess area; new farmland; different nitrogen levels; soybean yield; fertilizer use efficiency
- CLC:
-
S152
- DOI:
-
-
- Abstract:
-
N0, N1, N2, N3, N4 and N5 six different levels of nitrogen were applied in the new farmland of loess hilly areas, the nitrogen use efficiency, absorption and utilization of nitrogen, phosphorus and potassium by soybean and the effects on soybean growth and yield were compared and analyzed, and the optimum amount of nitrogen was determined through regression analysis. The results showed that under different nitrogen levels, nitrogen agronomic efficiency, nitrogen uptake efficiency, and nitrogen partial factor productivity presented the downward trend with increase of nitrogen application level, but the difference of nitrogen physiological efficiency was not significant; applying nitrogen could promote the absorption and utilization of nitrogen, phosphorus and potassium by soybean, and all of the N accumulation, P accumulation and K accumulation of soybean plant were the highest under N2 level, and there was significant difference each other, but there was no significant correlation between different nitrogen and N accumulation, P accumulation and K accumulation of soybean plant; all of the height and crown of soybean plant in branch stage, flowering and filling periods were the highest under N2 level, at the same time, the yield of soybean under N2 level was the highest, which was 188.83 g/m2, and increased by 8.68%~141.32% compared the other five nitrogen levels, and there was the highest yield benefit, which was 0.562 yuan/m2; the optimum amount of nitrogen of new farmland in loess area was 168~178 kg/hm2, and corresponding output was 1 800~1 802 kg/hm2.