| 黄瓜等九种蔬菜与NO3—N亲和力的研究 |
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| 引用本文： | 高祖明 张春兰. 黄瓜等九种蔬菜与NO3—N亲和力的研究[J]. 南京农业大学学报, 1990, 13(1): 75-79 |
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| 作者姓名： | 高祖明 张春兰 |
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| 作者单位： | 南京农业大学土壤农业化学系，南京农业大学土壤农业化学系，南京农业大学土壤农业化学系，南京农业大学土壤农业化学系，南京农业大学土壤农业化学系 88届毕业生，88届毕业生 |
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| 摘 要： | 应用酶动力学方程 v=(V_(max)[s])/(Km+[s]),通过 Lineweaver-Burk 法作图求取 km值.结果表明,供试的9种蔬菜苗期对 NO_3-N 的亲和力大小依次为:甜椒>玉米>番茄>黄瓜>甘蓝>茄子>茼蒿>芹菜>苋菜。蔬菜在吸收 NO_3-N 的同时,可向培养液中分泌微量的还原糖,蛋白质,有机酸等。其中草酸的分泌量随营养液中 NO_3-N 浓度的增加而明显增加。采用NH_4-N、NO_3-N 混合施肥,对降低叶菜类 NO_3-N 的累积效果明显。
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| 关 键 词： | 蔬菜 NO3－N 亲和力 |
STUDY ON COMPATIBILITY OF SEVERAL VEGETABLES WITH NO_3-N |
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| Gao Zuming Zhang Chunlan Ni Jingying Zhang Yin Zhou Quansuo. STUDY ON COMPATIBILITY OF SEVERAL VEGETABLES WITH NO_3-N[J]. Journal of Nanjing Agricultural University, 1990, 13(1): 75-79 |
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| Authors: | Gao Zuming Zhang Chunlan Ni Jingying Zhang Yin Zhou Quansuo |
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| Affiliation: | Department of Soil Science and Agricultural Chemistry |
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| Abstract: | A series of Km valucs were obtained graphically by Lineweaver-Burk methods andbased on the enzyme kinetical equotion.According to these values,the compatibility of9 species of vegetables with NO_3-N was in the following decreasing order:sweetpepper,corn,crown daisy,tomato,cucumber,cabage,eggplant,celery andamaranth.On absorbing the NO_3-N,these vegetable crops could excrete small amountsof reduced sugar,protein and organic acids.The excretion of oxalatic acid was found,in particular,to increase with the concentration of NO_3-N in the nutrition solution.The use of NO_3-N and NH_4-N mixed solution played an important role in dccreasingthe accumulation of nitrite in the leaves. |
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| Keywords: | vegetables NO_3-N compatibility Km |
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