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| DOI：10.13522/j.cnki.ggps.2019294 |
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| Growth of Sweet Buckwheat in Response to Sodium Selenite |
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MA Hongmei, BAI Chunyu, HAN Guangming, XIE Yinghe, WU Wenyue, MA Zhiyong
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1. College of Resources and Environment, Shanxi Agricultural University, Taigu 030801, China; 2. National Experimental Teaching Demonstration Center for Agricultural Resources and Environment, Shanxi Agricultural University, Taigu 030801, China
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| Abstract: |
| 【Objective】Selenium is a minor plant nutrient and the objective of this work is to experimentally study the effects of selenium on growth, yield and quality of sweet buckwheat.【Method】The experiments were conducted in pots fertilized with sodium selenium. Fertilizer gradient consisted of five sodium selenium concentrations. The pots were randomly arranged and during the experiment, we measured the growth of the buckwheat in each pot.【Result】Synthesis of chlorophyll, transpiration rate, stomatal conductance, net photosynthetic rate and biomass of the buckwheat were all boosted when the selenium application was in 0~10 mg/kg (fertilizer/dry soil), but were inhibited when the application exceeded 10 mg/kg. During the whole growth season, selenium fertilizer was most effective in the blooming stage. It was also found that rationally applying selenium fertilizer can slow the decline of the synthesis of chlorophyll, transpiration rate, stomatal conductance and net photosynthetic rate, thereby delaying the aging of the buckwheat.【Conclusion】Applying an appropriate amount of sodium selenite can promote buckwheat growth and delay its aging process, however excessive application inhibited growth of the canopy but not the roots. |
| Key words: sweet buckwheat; sodium selenite; photosynthesis; chlorophyll |
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