| 摘要: |
| 1994～1995年在菜园土壤上进行的田间试验表明,菠菜的硝态氮含量显著低于小白菜,后者是前者的1. 2～4. 3倍;菠菜外围叶片的硝酸还原酶活性略低于小白菜,但其他器官及整株均值都高于小白菜。菠菜累积的硝态氮主要分布于茎、叶柄和外围叶片,硝酸还原酶活性分布与此一致;小白菜的硝态氮主要分布于叶柄和外围叶片,而还原酶活性却集中于外围叶片。硝酸还原酶活性高低及分布是2种蔬菜硝态氮累积不同的主要原因。 |
| 关键词: 菠菜，小白菜，硝态氮累积，硝酸还原酶活性 |
| DOI： |
| 分类号:S158.3 |
| 基金项目:陕西省农办,杨陵基金和西北农业大学青年基金资助项目 |
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| The Accumulated and Reduction of Nitrate in Two Vegetable Plants |
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| Abstract: |
| Field experiments were carried out on vegetable garden soil from 1994 to 1995.The results obtained showed that the nitrate accumulated in spinach was significantly lower than that in Chinese cabbage,nitrate content in the latter being 1.2 to 4.3 times that in the former.The nitrate reductase activities of spinach outside blades were a bit lower than those of Chinese cabbage,but they were all higher in other organs and whole spinach plant.The nitrate in spinach mainly distributed in stems,petioles and outside blades,and so did the nitrate reductase activities.However,the nitrate in Chinese cabbage mainly distributed in petioles and outside blades,whereas the activities of nitrate reductase concentrated in outside blades.Nitrate reductase activity and its distribution were the major causes for the differences of nitrate accumulation between the two vegetables. |
| Key words: spinach,Chinese cabbage,nitrate accumulation,nitrate reductase activity, |
