不同灌水量对枸杞光合特性和产量的影响

通过对防雨棚下测坑中种植的枸杞进行不同灌水量控制试验,研究了不同灌水量对枸杞生理特性的影响。结果表明:不同灌水量对枸杞光合气体交换参数有显著的影响,随着灌水量的增加,枸杞光合气体交换参数(光合速率、气孔导度和胞间CO2浓度)均呈现先增加后减弱的趋势;荧光参数(Fm、Fv、Fv/Fm、Fv/Fo和Fm/Fo)随着灌水量的增加呈先增加后减少的趋势;枸杞叶绿素含量较对照相比均上升,且处理间差异显著;水分利用率随着灌水量的增加而逐渐减少;根据不同灌水处理下经济效益和土壤水分的可持续利用原则,最佳灌水量为675mm。

Study on Effect of Different Irrigation Amount on Photosynthesis Characteristics and Yield of Lycimn

Through different irrigation amount test of Lycium in the test pit under anti-canopy,the Photosynthesis characteristics of Lycium was studied.The results showed that the amount of irrigation had effect on the photosynthetic gas exchange parameters of Lycium,and with the increase of irrigation amount,the photosynthetic gas exchange parameters,including photosynthetic rate,stomatal conductance,and intercellular CO2 concentration,of Lycium all showed the trend of increased first then decreased later;the fluorescence parameters,including Fm,Fv,Fv/Fm and Fm/Fo,had the trend of increased first then decreased later;the chlorophyll content of all the treatments were higher than the control,and the difference among the different treatments were significantly.The water use efficiency(WUE)was gradually decreased with the increase of irrigation amount.According to the analysis result of economic benefit and sustainable use of soil water of Lycium under different irrigation amount,it is concluded that the optimum irrigation amount is 675 mm.