【摘要】 通过对苜蓿地下滴灌田间滴灌带不同埋深、滴灌水量等因子进行控制试验,结果表明:地下滴灌苜蓿生长期日耗水强度在4.1~4.7mm/d,最大日耗水强度为9.5mm/d,生长期耗水量为623.5~685.8mm;最大耗水时段出现在6月中旬~8月中旬,耗水量为359.5~379.6mm,苜蓿第二茬耗水量为400mm左右,多于第一、三茬之和。苜蓿生长期内需滴灌水量458.3~490.8mm,滴水次数10~12次,间隔10~20d,次滴水量20~50mm,10cm埋深较35cm深埋需多滴水量50mm。根据田间试验数据确定苜蓿地下滴灌制度,为大田地下滴灌苜蓿栽培提供参考依据。更多还原

【Abstract】 By results of the experiments of various buried depth and water irrigation volume for the Alfalfa under Subsurface Drip Irrigation(SDI),the paper indicates that water consumption(WC) for the Alfalfa under SDI during the growth is 4.1～4.7mm/d,the maximum WC is 9.5mm/d,the WC during the growth is 623.5～685.8mm;maximum WC usually occurs from the middle of June to the middle of August,the WC is 359.5～379.6mm,the second stubble WCs is about 400mm,is more than the water amount of the first and third stubble.Water demand of drip irrigation during the growth for the Alfalfa is about 458.3～490.8mm,irrigation times are about 10～20,the irrigation interval is about 10～20 days,water irrigation quantity is 20～50mm,water demand under subsurface drip irrigation of 10cm buried depth is 50mm more than 35cm buried depth.This experiment data is to provide the reference to the Alfalfa cultivate and make the irrigation system under SDI in the open field.更多还原