地下滴灌对土壤特性及韭菜根系分布的影响

Study on Soil Characteristic and Root Distribution of Chinese Chive in Subsurface Drip Irrigation

在日光温室内利用地下滴灌栽培韭菜试验,结果表明,由于地下滴灌是通过埋于作物根系活动层的灌水管带定时定量地为作物供水,改变了水分在土壤中的运移方式,与对照相比,地下滴灌耕层土壤有机质含量增加13.71%￣30.08%,土壤容重降低11.2%￣12.4%,耕层土壤孔隙度增加12.2%￣13.9%,给根系创造了良好的生长环境,促进根系向深层土壤生长,10￣15cm、15￣20cm长的根占总根量的比率增加12.5%、2.9%,0￣5cm土层内韭菜根干重占所有土层根干重比率降低30.2%,5￣10cm、10￣15cm、15￣20cm土层内分别增加19.9%、8.5%、1.8%。

The experiment of planting Chinese chives with Subsurface Drip Irrigation Indicated that Subsurface Drip Irrigation made the content of soil organic matter increase 13.71%-30.08% ,soil bulk density decrease 11.2%-12.4% ,and soil porosity of arable soil increase 12.2%-13,9%. So that, Subsurface Drip Irrigation improved root growing environment , increased root growth to deep soil, percentage of 10-15cm, 15-20cm length root number increased 12.5%, 2.9%, percentage of root dry weight in 0-5cm decreased 30.2%, percentage of root dry weight in 5-10cm, 10-15cm, 15-20cm depth soil increased 19.9%, 8.5% and 1.8% respectively.