不同管距时玉米渗灌效果的试验研究

Effect of pipe space on maize infiltration irrigation

在运城市夹马口灌区和红旗灌区进行了1996,1997两个年度的玉米渗灌试验,研究了不同毛管间距条件下渗灌对其产量及水分生产率等的影响。结果表明,玉米渗灌毛管间距采用0.8~1.0 m较为适宜。毛管间距愈大,产量愈低;渗灌较地面灌平均减产7.23%,较旱地平均增产30.8%;玉米生长期内总耗水量地面灌最大,渗灌次之,旱地最小。渗灌可明显提高玉米水分生产率,渗灌处理水分生产率平均为1.65 kg/m3,是地面灌的1.2倍,是旱地的1.33倍;两年度渗灌较地面灌平均节水44.4%。

The experimental study performed in Jiamakou irrigated area and Hongqi irrigated area of Yuncheng City in 1996 and 1997 shows that the suitable capillary pipe spacing for infileration irrigation is 0.8-1.0?m,and the larger the pipe spacing,the lower the yield of maize;that the yield of maize under infileration irrigation is 7.23% less than that of the surface irrigation,and 30.8% more than that of non-irrigated farmland;and that the total water consumption of maize during the growing period is the largest under surface irrigation,mediate under infileration irrigation,and the lowest in non-irrigated farmland.It is also concluded that infileration irrigation can greatly improve the water efficiency of maize,the mean value of water efficiency of maize under infileration irrigation being 1.65?kg/m^3,which is 1.2 times as much as that under surface irrigation,and 1.33 times as much as that without irrigation,and that the annual average water saving can reach 44% by infileration irrigation as compared with surface irrigation.