摘要
采用设施蔬菜普遍使用的注入式滴灌施肥方式,对单根滴灌管进行不同时间取样,采用荧光示踪剂若丹明WT溶液(0.1g·L-1)研究滴灌施肥过程中灌水流量和肥料浓度的时空变化规律。根据灌水流量和肥料浓度的变化以及水力特性,研究不同注肥条件对滴灌注肥控制系统水肥均匀性的影响,分析滴灌注肥过程中液态肥料在管路系统的分布规律。结果表明:滴灌注肥控制系统通过控制供水量、混合后溶液注入量,可以实现施肥量的精确控制。
Sampling single drip irrigation tube at different times and using fertilizer injection drip irrigation in greenhouse,we studied the spatial and temporal variation of irrigation flow and fertilizer concentration in the irrigation process by Rhodamine WT(0.1 g·L-1)solution as fluorescent tracer.According to the changes of irrigation flow and fertilize concentration and the hydraulic characteristics in different conditions of fertilization injection,the affection to water and fertilizer uniformity were studied by the fertilization injection drip irrigation system,and liquid fertilizer distribution in the pipeline system were analyzed in the fertilization injection process finally.The results showed that the drip irrigation and injection fertilizer control system can realize the accurate control of fertilizer rate by controlling water suppy quantity and injection rate of mixed solution.
出处
《中国蔬菜》
北大核心
2011年第Z1期108-111,共4页
China Vegetables
基金
现代农业产业技术体系北京市果类蔬菜创新团队项目
北京市科委重大项目(D101105046310003)
关键词
设施蔬菜
施肥
滴灌注肥控制系统
均匀性
Greenhouse vegetable
Fertilize
Drip irrigation and injection fertilizer control system
Uniformity
