草业学报2016，Vol.25Issue(10)：104-112,9.DOI:10.11686/cyxb2015584
干旱胁迫与复水对牛鞭草生长发育的补偿效应研究
Compensatory effects of drought stress and rewatering on growth of Hemarthria compressa
摘要
Abstract
The aim of this study was to evaluate the effects of drought stress and compensatory rewatering on Hemarthria compressa ,to provide a scientific basis for water management during the cultivation of this plant. Four treatments (normal water supply,light drought,medium drought,and heavy drought)were established in a pot experiment.Light drought did not significantly affect the growth of H .compressa.On day 12 after re-watering,the four treatments could be ranked,based on the biomass of plants,as follows:light drought>nor-mal water supply≈medium drought>heavy drought.The biomass of plants under light drought was 11.47%greater than that of plants with a normal water supply.Also,the nitrogen content in H .compressa was signif-icantly higher in plants under light and medium drought than in those with a normal water supply,and was similar in control plants and drought-stressed plants on day 12 after rewatering.These results showed that ap-propriate drought and rewatering barely affected or even improved the yield and protein content of H .compres-sa.Drought increased the root/shoot ratio and potassium and proline contents in H .compressa.However, medium and heavy drought led to decreases in nitrate reductase activity,root activity,and phosphorus,potas-sium,and nitrogen uptake.After rewatering of drought-stressed plants,the relative water content of leaves, proline content,and nitrate reductase activity recovered quickly to levels similar to those in the control,and the chlorophyll content increased gradually.The root activity of drought-treated plants on day 12 after rewatering was significantly higher than that in the control.The recovery of root activity was helpful for nitrogen assimila-tion,nutrition uptake,and photosynthesis,which restored normal metabolism and growth.These results im-plied that mild drought and rewatering could not only save water and mitigate drought damage,but also im-prove the yield and quality of cultivated H .compressa.关键词
牛鞭草/干旱/复水/补偿效应Key words
Hemarthria compressa/drought/rewatering/compensatory effect引用本文复制引用
张卫华,靳军英,汪明星,黄建国..干旱胁迫与复水对牛鞭草生长发育的补偿效应研究[J].草业学报,2016,25(10):104-112,9.基金项目
西南大学博士资金项目（SWU112059）和国家水体污染控制与治理科技重大专项（2012ZX07104-003）资助。 （）
