CAJ | 학술논문

滴头流量和设计湿润比是滴灌系统设计中的两个重要设计参数，影响土壤湿润范围及作物根系生长。试验采用2种滴头流量和3种设计湿润比，进行了滴灌土壤水分入渗特性试验，观测了湿润锋和土壤含水率变化情况，结果表明：灌水过程中湿润体体积随时间成线性变化，且相关系数 R2均大于0．98；灌水结束后，大流量滴头形成的实际湿润比大，平均含水率小，含水率分布更均匀；选取65％和70％田间持水率作为有效含水率下限，大于等于此含水率的湿润体形成的湿润比为有效湿润比，发现灌水结束24 h内有效湿润比均为1／2设计湿润比左右，48 h较灌水结束24 h时有效湿润比有明显的减小；对于作物生长而言，采用有效湿润比代替湿润比，对于指导灌溉系统设计更有参考价值。
적두류량화설계습윤비시적관계통설계중적량개중요설계삼수，영향토양습윤범위급작물근계생장。시험채용2충적두류량화3충설계습윤비，진행료적관토양수분입삼특성시험，관측료습윤봉화토양함수솔변화정황，결과표명：관수과정중습윤체체적수시간성선성변화，차상관계수 R2균대우0．98；관수결속후，대류량적두형성적실제습윤비대，평균함수솔소，함수솔분포경균균；선취65％화70％전간지수솔작위유효함수솔하한，대우등우차함수솔적습윤체형성적습윤비위유효습윤비，발현관수결속24 h내유효습윤비균위1／2설계습윤비좌우，48 h교관수결속24 h시유효습윤비유명현적감소；대우작물생장이언，채용유효습윤비대체습윤비，대우지도관개계통설계경유삼고개치。
Dripper discharge and design wetted percentage are two important design parameters ,they have impact on the limits of soil moistened and root growth of main crops .This test used two kinds of dripper discharge and three kinds of design wetted percentage , and conducted drip experimental research on soil water infiltration characteristics .Through observing the wetting front and the varia‐tion of soil water content ,the results showed that :the wetted body volume showed a linear variation with time ,and the correlation coefficient (R2 ) was greater than 0 .98 .When the irrigation ended ,the greater dripper discharge formed a bigger actual wetted per‐centage ,and the moisture content distributed more uniform ;65% and 70% field capacity was selected as the low limit of effective water content ,the wet ratio was formed by wetted body whose moisture content was greater than or equal to this water content is ef‐fective wetting ratio ,and found that within 24h irrigating ended ,the effective wetting ratio were all about 1/2 of design wetting per‐centage ;for crop growth ,effective wetting ratio has a great reference value than design wetted percentage for guiding irrigation of system design .