作　　者： ; ; ;

机构地区： 河南大学生命科学学院

出　　处： 《中山大学研究生学刊（自然科学与医学版）》 2009年第1期25-34,共10页

摘　　要： 本实验研究了干旱和复水对大豆光合生理及生物量的影响。研究发现,当土壤相对含水量低于22%时,处理组叶片水势急剧下降,表现为一定的阈值反应。叶片的净光合速率、气孔导度、蒸腾速率等并不随着土壤相对含水量的梯度下降而迅速下降,而是与叶片水势的波动一致。复水后,光合作用的各项参数快速上升。对不同时期大豆生物量的差异性分析得知,8月4日处理组植株总生物量与对照组有显著差异;10月2日对照组和处理组的总生物量之间没有显著差异,且种子产量相差不大。通过研究,以期为大豆抗旱栽培和高效利用水分提供理论依据。 This research is about the influence of drought and re-watering upon the soybean＇s photosynthetic physiology and biomass. Research showed when soil moisture was below 22% of FWC （field water capacity）, the water potential of leaves decreased rapidly, which appeared a significant threshold value reaction. Statistics showed that the net photosynthesis ratio, Gs and the transpiration ratio of the leaves did not decrease rapidly together with the decreasing of the soil moisture, but consistent with the fluctuation of leaves＇ water potential. After the re-watering, various parameters of the photosynthesis increased rapidly. According to the analysis of the difference of the soybean biomass in different period, it was found that, on August the 4th, there was apparent difference between the drought weight of the processed plants and the well-kept ones. On October the 2nd, there did not exist great disparity in the total biomass between the processed plants and the well-kept ones, also, there was no great difference in seed production. The aim of this research is to offer a theoretical basis for drought-tolerance planting and high-efficiency water use of soybean.

关 键 词： 大豆 干旱和复水 水势 光合作用 生物量 节水增产

领　　域： [农业科学] [农业科学]