为了探讨浅埋式滴灌毛管间距对苜蓿生长的影响，在阿勒泰市青河地区进行苜蓿浅埋式滴灌田间试验，试验设置30、60、90 cm 3种毛管间距。通过观测各土层含水率、苜蓿毛细根密度以及生长指标等，研究毛管间距对土壤水分以及苜蓿生长的影响。结果表明：毛管间距为60、90 cm处理的各土层含水率增值优于30cm处理；毛管间距30、60 cm处理苜蓿的毛细根密度明显高于毛管间距90 cm的处理；毛管间距为30、60 cm的处理对苜蓿生长的影响差异较小，其中以间距60 cm处理为优，而间距为90 cm对其影响较大，不利于苜蓿的生长。因此，毛管间距以60 cm最优，适合该地区苜蓿的灌溉。
英文摘要:
In order to study the effect of drip-line distance of shallow buried drip irrigation on the growth of alfalfa, we set the drip distance to 30, 60, 90 cm according to the field experiment of shallow buried drip irrigation in Qinghe area of Altay City. The influence of drip-line distance on soil moisture and alfalfa growth in each soil layer were studied by observing soil moisture content, root weight density and growth index of alfalfa. The results showed that the increment of water content in soil layers with distance of 60 cm and 90 cm was better than that of 30 cm. The root weight density of alfalfa with drip distance of 30 cm and 60 cm was significantly higher than that of 90 cm. The difference of the effect of 30 cm and 60 cm distance on the growth of alfalfa is small, but the treatment with distance of 60 cm was more reasonable, while the treatment with distance of 90 cm had a greater influence, which was not conducive to alfalfa growth. Therefore, the optimal drip-line distance of 60 cm is suitable for alfalfa irrigation in the studied area.