湖南农业大学学报（自然科学版）2017，Vol.43Issue(2)：156-160,5.DOI:10.13331/j.cnki.jhau.2017.02.008
钾对刺葡萄光合作用的影响
Effects of potassium on the photosynthesis of Vitis davidii Foёx.
摘要
Abstract
Vitis davidii Foёx. was used as material, four treatments of potassium(0, 135, 270 and 540 g/plant) were designed to study the influence of potash fertilizer on photosynthesis. Results showed that higher net photosynthetic rates were achieved at the treatment of 270 g/plant, maximum appeared in veraison period,which was 8.91μmol/(m2·s); stomatal conductances were higher at the treatment of 540 g/plant in every period; highest transpiration rate was got in expand period at the treatment of 270 g/plant, it was 5.33 mmol/(m2·s); the intercellular CO2 concentrations of 270 g/plant were lower than other treatment except in bloom period. There were extremely significant positive correlations between potassium and net photosynthetic rate, transpiration rate and stomatal conductance; the photosynthetic diurnal variation presented a bimodal curve in different periods, showing the peak at 10:00 and 16:00. The treatment of 540 g/plant had the highest net photosynthetic rate at expand (6.05μmol/m2·s), veraison (7.63μmol/m2·s) and defoliation period (4.75μmol/m2·s) at 10:00, respectively. The treatment of 270 g/plant came second, while the treatment of 135 g/plant and 270 g/plant had the highest at bloom period(5.31μmol/m2·s) and at mature period (5.61μmol/m2·s), respectively. At 16:00, except the treatment of 540 g/plant had the highest net photosynthetic rate at bloom period, the treatment of 270 g/plant had the highest net photosynthetic rates at expand, expand, veraison, mature and defoliation period, which were 4.26, 3.61, 2.87 and 2.30μmol/(m2·s), respectively. In conclusion, the application of 270 g/plant potassium is benefit for photosynthesis of Vitisdavidii Foёx.关键词
刺葡萄/钾/光合作用Key words
Vitis davidii Foёx./potassium/photosynthesis分类
农业科技引用本文复制引用
周敏,曾蓓,赵玉华,白描,杨国顺..钾对刺葡萄光合作用的影响[J].湖南农业大学学报（自然科学版）,2017,43(2):156-160,5.基金项目
国家科技支撑计划项目(2013BAD20B10) （2013BAD20B10）
国家现代农业产业技术体系项目(CARS–30–zp–5) （CARS–30–zp–5）
湖南省科技计划重点项目(2013FJ6102) （2013FJ6102）
