宁夏中部干旱带枸杞痕量灌溉试验研究

Experimental Study on Trace Irrigation of Lycium Barbarum L.in Arid Area of Central Ningxia

为探究痕量灌溉不同灌水量设置对枸杞大面积种植区土壤含水规律及产量的影响,选取宁夏中部干旱带枸杞大面积典型种植区,通过设置生育期不同灌水量,开展多年生枸杞、一年生枸杞痕量灌溉技术同多年生枸杞滴灌技术进行灌水量、土壤含水规律及产量对比分析试验。结果表明:当痕量灌溉管埋深为25 cm,痕量灌溉比滴灌能够更好地补充枸杞生长所需的水分,尽可能减少了土壤蒸发和深层渗漏,达到节水目标;痕量灌溉生育期灌水量对作物产量的影响与滴灌相似,在保持产量相同水平情况下,痕量灌溉较滴灌能够减少用水量16%左右;试验得出枸杞采用痕量灌溉技术全年灌水8~11次,年灌水量2250~2775 m3/hm2,生育期灌水量1650~2175 m3/hm2。

In order to explore the effect of different irrigation amount of trace irrigation on the soil water content and yield of Lycium barbarum L.in large-area planting area of central arid zone of Ningxia,through setting different irrigation amount in growth period,the trace irrigation technology of perennial and annual Lycium barbarum L.are carried out by comparative analysis test.The results show that:when the buried depth of trace irrigation pipe is 25 cm,trace irrigation can better supplement the water needed for Lycium barbarum L.growth,reduce the soil evaporation and deep leakage as far as possible,which achieves the goal of water saving.The effect of irrigation amount of trace irrigation on crop yield is similar to that of drip irrigation,and the water consumption of trace irrigation is about 16%which is less than that of drip irrigation under the same yield level.The results show that the total amount of irrigation is 2250 to 2775 m3/hm2 and 1650 to 2175 m3/hm2 respectively.The conclusion of this paper can provide technical reference for the trace irrigation technology in large-scale planting of wolfberry and other similar crops.