Bell pepper response to surface and subsurface drip irrigation under different fertigation levels |
| |
| Authors: | Qinghua?Kong Email author" target="_blank">Guangyong?LiEmail author Yonghong?Wang Hongxu?Huo |
| |
| Institution: | (1) College of Water Conservancy and Civil Engineering, China Agricultural University, 100083 Beijing, People’s Republic of China;(2) Beijing Water Conservancy School, 100024 Beijing, People’s Republic of China;(3) Management Office of Yuhe, Shangxi Province, 037000 Datong, People’s Republic of China; |
| |
| Abstract: | A two-year field experiment was conducted in 2007 and 2008 to investigate different bell pepper responses to subsurface drip
irrigation (SDI) and surface drip irrigation (DI) under four nitrogen levels: 0, 75, 150, and 300 kg/ha N (N0, N75, N150, and N300, respectively). Irrigation interval was set at 4 days. Bell pepper yield under SDI was significantly higher than that under
DI by 4% in 2007 (13% in 2008). Water consumption under SDI was lower than that under DI by 6.7% in 2007 (7.3% in 2008). Meanwhile,
root length density under SDI was obviously higher than that under DI by 11.8% in 2007 (12.5% in 2008). The percentage of
root length below 10-cm soil depth under SDI was higher than that under DI by 7%, proving that SDI promotes crop root growth
and enhances downward root development. Soil N residue under SDI was lesser than that under DI. Lastly, SDI with N application
of 150 kg/ha is recommended as an optimal fertigation practice in improving bell pepper yield and water-use efficiency, as
well as in NO3
−-N leaching. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
