| Cite this article: | 张玉豪,姚素梅,孟丽,等.滴灌条件下土壤基质势对红豆杉幼苗叶绿素荧光特性和生长的影响[J].灌溉排水学报,0,():-. |
| ZHANG Yu-hao,YAO Su-mei,MENG li,et al.滴灌条件下土壤基质势对红豆杉幼苗叶绿素荧光特性和生长的影响[J].灌溉排水学报,0,():-. |
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| Effects of Different Soil Matric Potential on Chlorophyll Fluorescence Characteristics and Growth of Taxus Chinensis Seedlings under Drip Irrigation Condition |
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ZHANG Yu-hao, YAO Su-mei, MENG li, DENG Zhe
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School of Life Science and Technology,Henan Institute of Science and Technology,Xinxiang
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| Abstract: |
| 【Objective】The Objective is to investigate the effects of different soil matric potential on chlorophyll fluorescence characteristics and plant growth of Taxus chinensis seedlings.【Method】In this experiment,taking potting of Tai Hang taxus chinensis seedlings as test material and the soil matric potential 20 cm underneath the drip emitter was set as five lower limits of -10kpa, -20kpa, -30kpa, -40kpa and -50kpa.Growth indexes of taxus chinensis seedlings were recorded and chlorophyll fluorescence parameters were measured with PAM-2500 Portable Chlorophyll Fluorometer monthly.【Result】(1)In the spring,the F0,Fm,Fv/Fm and Fv/F0 of Taxus chinensis seedlings showed a downward trend, and the qP, NPQ, ETR and Y(Ⅱ) were on the rise.Although Taxus chinensis seedlings with low soil matric potential showed slight stress, they were still well resistant.After entering summer,There was no significant difference between F0,Fm,Fv/Fm and Fv/F0 of Taxus chinensis seedlings,the qP, ETR and Y (Ⅱ) showed a downward trend,and the NPQ increased first and then decreased.High soil matrix potential was beneficial to improve the photosynthetic electron transfer rate and the degree of opening of PSⅡ reaction center,but the Taxus chinensis seedlings with low soil matrix potential still had a certain light protection ability.(2)The Plant height, Ground diameter and Crown breadth of taxus chinensis seedlings in the -20kpa treatment group reached the maximum value at the later stage of the experiment,and the LAI was second only to the -30kpa treatment group, but there was no significant difference.【Conclusion】Taxus chinensis seedlings have certain drought resistance ability and the lower limit of soil matrix potential was set at -20kpa directly below the drip emitter, which was beneficial to the growth of taxus chinensis seedlings. |
| Key words: taxus chinensis seedlings; drip irrigation; soil matric potential; chlorophyll fluorescence characteristics; |
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