蓄水坑灌法技术要素初探

A Preliminary Research on the Technical Elements of Water Storage Pit Irrigation Method

通过理论分析与试验相结合的方法 ,对蓄水坑灌法的技术要素包括蓄水坑的坑半径、坑深、坑数、坑距及蓄水坑的渗水结构形式等进行了初步研究。结果表明 ,蓄水坑的半径不宜过大 ,也不宜过小 ,一般单坑直径可定为 2 5～ 35cm ;蓄水坑深根据果树主要根系活动层的分布和蓄水坑湿润情况 ,将其确定为 6 0cm ;蓄水坑底部宜采用不透水的形式 ,这样有利于土壤水分在水平方向的运动 ;蓄水坑的坑数、坑距的确定与土壤水分在土体中的水平最大推进距离有直接关系 ,其大小需根据果园具体情况通过试验的方法确定 ;蓄水坑灌法可实行小定额灌水 。

With the theoretical analysis and experimental method, the technical elements of water storage pit irrigation method were studied preliminarily including the radius,depth of a, the structural shape of the pit bottom, the space between pits and the number of pits under a tree. The results showed: The suitable diameter of a pit is 25～35cm; according to the distribution depth of the main roots and the wetted depth of soil moisture through a pit, the pit depth should be up to 60cm;the pit bottom should be impervious,which is benefit to soil moisture moving in horizontal direction;the number of pits under a tree and the space between pits are connected with the longest advancing distance of soil moisture in soil mass directly, which needs to be determined by experiment according to the conditions of a orchard;water storage pit irrigation can carry on under small irrigation water requirement,and it is a water-saving method.