日光温室中自流式低压滴灌技术的研究

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。

Application of Gravity and Low Head Drip Irrigation Techniques in Solar Greenhouses

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.