【摘要】 文章给出了自流式低压滴灌系统的灌水量与灌水延续时间的关系。对日光温室经常采用的 2种灌水毛管及滴头的试验结果表明 ,低水头条件下滴头流量对压力降低较为敏感 ,随着压力的减少流量会显著降低。但是 ,滴头流量减少仅仅延长了灌水时间 ,对毛管灌水均匀度的影响并不显著。更多还原

【Abstract】 This paper summarized the experiences of using simple gravity drip irrigation techniques by farmers and proposed a variable and low head drip irrigation system for reducing irrigation cost and improving irrigation efficiency in Chinese style lean solar greenhouses. The relationship between water application and dripping time was presented for the system. Two kinds of drip discharge experiments under the low head conditions showed that the emitter discharge is much more sensitive to low pressure than high pressure. With decreasing pressure the discharge is evidently reducing. However, decreasing discharge only results in extending the dripping time instead of influencing water application uniformity.更多还原