Precision Drip Irrigation on Hot Pepper in Arid Northwest China Area
An experiment was conducted to study the effects of different soil water potential (SWP) on soil water content, hot peppers yield, water con-sumption and water use efficiency (WUE) under plastic-mulched drip irrigation in the North-West China in order to find a suitable SWP to guide the pepper ir-rigation. Five treatments were set based on SWP, they are-lOkPa (Nl),-20kPa (N2),-30kPa (N3),-40kPa (N4) and 50kPa (N5). A control treatment (N6) was set based on local irrigation practice, i.e. border irrigation. SWP was measured using tensiometers at 0.2 m depth immediately under drip emitters. Pepper leaf area, plant height, soil water content, yield and total soluble solid (TSS) were measured, soil water content and water use efficiency were calculated. Results shows that the differences in leaf area index and plant height are not significant (P>0.05) among treatments of Nl, N2, N3 and N4. While the pepper yields, WUE and TSS are higher for treatments N3 and N4. Controlling SWP at-50kPa greatly decreases crop yield and WUE. Therefore, we recommend-30 ～40 kPa as the irrigation threshold for pepper cultivation under mulched drip irrigation in arid areas of the North-West China.
Soil water potential yield, water use efficiency mulched drip irri-gation Northwest China
Huiying Yang Haijun Liu Yan Li Guanhua Huang Fengxin Wang
College of Water science, Beijing Normal University, Beijing, China, 100875 College of Water science, Beijing Normal University, Beijing, China, 100875 China National Laborator College of Water Conservancy & Civil Engineering, China Agricultural University,Beijing, China 10008
国际会议
南昌
英文
185-197
2010-10-22（万方平台首次上网日期，不代表论文的发表时间）