山东农业科学Issue(4)：66-70,75,6.DOI:10.14083/j.issn.1001-4942.2015.04.017
几种豆科作物对酸性土壤逆境因子适应性研究
Study on Adaptability of Leguminous Crops to Stress Factors in Acid Soil
摘要
Abstract
Hydroponic experiments were conducted to study the response of three leguminous crops to the stresses of low pH, low phosphorus and high concentrations of Al3+and Mn2+.The plant growth, related en-zyme activities, nutrient absorption, organic acid secretion and their differences between the three leguminous crops were analyzed.The results were as follows.The biomass decreased significantly and the H+-ATPase activity in root tips increased significantly in the three leguminous crops under the low pH (4.5 and 5.5) con-dition;and the effects of low pH stress on the three leguminous crops showed the order of sweet clover>alfalfa>soybean.Low phosphorus (0.05, 0.10 mmol/L) stress significantly decreased the biomass and P accumu-lation in plants but increased the H+-ATPase activity in root tips;in which, alfalfa was more sensitive to low phosphorus, while sweet clover had the highest adaptability.After Al3+(3~10 μmol/L) treatment, the root tips of alfalfa and sweet clover could be dyed purple by hematoxylin, and the color of alfalfa was deeper.How-ever, the root tips of soybean could not be dyed obviously.After treated with 30μmol/L Al3+, the citric acid was secreted by the root tips of soybean.The effects of Mn2+(50, 100μmol/L MnSO4 ) on biomass and Mn2+accumulation in plants were in the order of soybean >alfalfa>sweet clover.The comprehensive adaptability of the three crops to the four stresses of acid soil were evaluated by assignment method, and the results showed that soybean had the best comprehensive adaptability, and then sweet clover;alfalfa had the worst comprehen-sive adaptability.关键词
豆科作物/酸性土壤/逆境/适应性/差异Key words
Leguminous crops/Acid soil/Adverse situation/Adaptability/Differences分类
农业科技引用本文复制引用
夏龙飞,吕娇,赵尊康,黎晓峰,王永雄..几种豆科作物对酸性土壤逆境因子适应性研究[J].山东农业科学,2015,(4):66-70,75,6.基金项目
广西自然科学基金“酸性土壤上甘蔗幼苗失绿黄化成因、机理及对策研究” （）
