不同品种大枣产量及生理特性比较研究

Comparison on Yield and Physiological Characteristics for Different Varieties of Ziziphus jujuba

通过对朝阳地区6种不同枣树品种的产量和生理特性的比较研究,结果表明:金铃圆枣的产量最高,为8 491.03 kg·hm-2,大圆铃枣的产量最低,为4 925.43 kg·hm-2,大圆铃枣的产量与其余5个品种的产量差异达到极显著水平,其余枣树品种间差异都不显著;6个枣树品种光合速率和气孔导度日变化曲线均呈双峰型、蒸腾速率日变化呈单峰型,不同枣树品种的光合速率、蒸腾速率和气孔导度间的差异均未达到显著水平,枣树品种的产量受蒸腾速率的影响最大。

The yield and physiological characteristics of six varieties of j uj ube in Chaoyang district were compared. Result shows that the yield of Ziziphusjujuba Mill.cv.Jinlingyuan are the highest,being 8 491.03 kg hm-2;the yield of Ziziphusjujuba Mill.cv.Dayuanling is the lowest,being 4 925.43 kg hm-2;the difference of production of Ziziphus jujuba Mill.cv.Dayuanling and the other five varieties reach significant level;the difference among the rest j uj ube cultivars are not significant;the diurnal changes of the photosynthetic rate and stomatal conductance for the six j uj ube varieties show a “bimodal”type,and their diurnal changes of transpiration rate show a “unimodal”type;differences of photosynthetic rates,transpiration rate & stomatal conductance for different varieties of j uj ube didn’t reach significant level;the yield of j uj ube varieties was greatly affected by the transpiration rate.