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中文摘要：
针对宁夏灌溉水资源紧缺的生产实际,以覆膜滴灌枸杞为研究对象,设置不同灌溉定额进行田间试验,研究了不同灌溉定额对枸杞光合特性及产量的影响。结果表明：1净光合速率日变化,低水分呈双峰型,高水分呈抛物线型;蒸腾速率日变化呈单峰型,不同水分处理的蒸腾速率峰值出现时间点不同;胞间CO_2浓度随着灌水量的增加而降低;2灌溉定额2 700m~3/hm~2时叶绿素相对含量最大,为67.2,灌溉定额3 600m~3/hm~2时最小,为64;3灌溉定额2 700m~3/hm~2时产量最高,为10 440kg/hm~2,灌溉定额3 600m~3/hm~2时产量最低,为7 126.2kg/hm~2,灌水量在一定范围内可增产,但超出2 700m~3/hm~2,产量与灌溉定额不呈正相关关系。
英文摘要：
Aim at the production practice of irrigation water resources shortage in Ningxia. The study was conducted to research the effect of different irrigation quota on photosynthesis characteristics and yield of lycium. The results showed that： （1）the net photo- synthetic rate of the low and high water treatment respectively showed the double peak and parabola type; the transpiration rate vari- ation showed a single-peak curve, the peak value appeared at different time for different treatments; intercellular CO2 concentration decreased with soil water content threshold increased. （2）The minimum value of the chlorophyll relative content was 67. 2, when the irrigation quota was 2700 m3/hm2 ,and the maximum value was 64, when the irrigation quota was 3 600 m3/hm2 ; （3）The optimal yield was 10 440 kg/hm2, when the irrigation quota was 2 700 m3/hm2 ,and the lowest yield was 7 126. 2 kg/hm2 when the irrigation quota was 3 600 m3/hm2 ;the irrigation could increase yield, but the yield was not positively correlated with irrigation when the irri- gation amount was more than 2700 m3/hm2.
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