排灌机械工程学报2025，Vol.43Issue(9)：929-937,951,10.DOI:10.3969/j.issn.1674-8530.24.0040
微灌管网布置方式和肥液浓度对施肥性能影响的田间评估
Field evaluation of fertigation performance for a drip irrigation system under different lateral layouts and fertilizer concentrations
摘要
Abstract
The lateral layouts and preset concentrations of fertilizer solution are important factors affec-ting the system uniformity performance of the applied water and fertilizer.Field experiments were con-ducted to evaluate the effects of lateral layout and fertilizer solution concentration on fertigation per-formance at the irrigation subunit and rotation group scales.Two methods were considered for pipeline layout:45 m and 90 m(denoted S45 and S90,respectively)capillary and one dual-ends water fee-ding modes with lateral length of 90 m(denoted as D90)were considered.Fertilizer solution concen-trations(mass fraction of fertilizer)were set at three levels:0.181％,0.091％,and 0.060％(denoted as C1,C2,C3,respectively).The results demonstrate that compared with single-end water feeding mode,the dual-ends water feeding mode reduces the pressure head deviation by 26.1％to 32.0％,and reduces the pressure head deviation rate of the rotational group by 27.2％.The emitter discharge devia-tions observed are generally less than 20％in the subunits,which are less affected by the pressure head imbalance among the subunits.However,the emitter discharge deviations in the rotation group re-main approximately 30％.The dual-ends water feeding mode significantly improve the uniformity of the water and fertilizer applied at the rotational irrigation group scale,while a relatively decrease in fertilizer solution concentration benefits the uniformity of the applied fertilizer.It is recommended to choose dua-lends water feeding mode in drip irrigation systems,and to increase the duration of fertilizer application when the total amount of fertilization applied has been determined in order to attenuate the negative im-pact of high fertilizer concentration on the uniformity of fertilizer application.关键词
微灌/施肥性能/管网布置方式/肥液浓度/压力水头偏差/灌水均匀性/施肥均匀性Key words
drip irrigation/fertigation performance/lateral layout/fertilizer concentration/pressure head deviation/water uniformity/fertilize uniformity分类
农业科技引用本文复制引用
孙嘉明,王珍,李久生,吴莉鸿,冯浩,栗岩峰..微灌管网布置方式和肥液浓度对施肥性能影响的田间评估[J].排灌机械工程学报,2025,43(9):929-937,951,10.基金项目
国家重点研发计划项目(2022YFD1900402) （2022YFD1900402）
国家自然科学基金资助项目(52279053,51790531) （52279053,51790531）
