镍对蕹菜生长和营养成分的影响

通过水培方式种植蕹菜,研究以尿素态氮作唯一氮源条件下,不同浓度镍对蕹菜生长、脲酶活力和某些营养成分的影响。结果表明：适量镍对蕹菜生长、脲酶活力和氨基酸合成有促进作用,但过量的镍产生毒害作用。施镍20μg/L处理的蕹菜鲜重最高、比对照高12.1%,但镍浓度高于320μg/L时蕹菜鲜重下降,施镍1 280μg/L处理的蕹菜表现出受害症状;适量的镍（20-80μg/L）可显著提高蕹菜叶片的脲酶活力,最高幅度达13.6%,脲酶含量也显著提高,最大增幅19.0%,但过量镍（大于640μg/L）会抑制脲酶活力。研究足量镍（60μg/L）影响蕹菜脲酶的作用机理,结果显示,镍可能先是提高脲酶比活力,然后参与脲...

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Published in广东农业科学 Vol. 44; no. 3; pp. 52 - 60
Main Author 黎宁 王金生 王业耀 王学礼 秦旭芝
Format Journal Article
LanguageChinese
Published 北京师范大学水科学研究院,北京100875 2017
中国环境监测总站,北京100012%广西大学农学院,广西南宁,530004%广西壮族自治区环境监测中心站,广西南宁,530028
广西壮族自治区环境监测中心站,广西南宁530028%北京师范大学水科学研究院,北京,100875%北京师范大学水科学研究院,北京100875
Subjects
可溶性糖
施镍处理
氨基酸
水培
脲酶
蕹菜
水培
施镍处理
蕹菜
脲酶
可溶性糖
氨基酸
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ISSN1004-874X
DOI10.16768/j.issn.1004-874X.2017.03.008

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Summary:通过水培方式种植蕹菜,研究以尿素态氮作唯一氮源条件下,不同浓度镍对蕹菜生长、脲酶活力和某些营养成分的影响。结果表明：适量镍对蕹菜生长、脲酶活力和氨基酸合成有促进作用,但过量的镍产生毒害作用。施镍20μg/L处理的蕹菜鲜重最高、比对照高12.1%,但镍浓度高于320μg/L时蕹菜鲜重下降,施镍1 280μg/L处理的蕹菜表现出受害症状;适量的镍（20-80μg/L）可显著提高蕹菜叶片的脲酶活力,最高幅度达13.6%,脲酶含量也显著提高,最大增幅19.0%,但过量镍（大于640μg/L）会抑制脲酶活力。研究足量镍（60μg/L）影响蕹菜脲酶的作用机理,结果显示,镍可能先是提高脲酶比活力,然后参与脲酶合成而提高脲酶含量,从而更进一步提高脲酶活力。叶片中总氨基酸含量在镍0-40μg/L范围内随镍浓度提高而升高,最高升幅44.7%,镍大于10μg/L时效果极显著,之后保持稳定水平;叶片中可溶性糖含量在过高浓度镍处理（大于640μg/L）时显著升高。
Bibliography:The paper investigated the effects of various concentrations of nickel on growth, urease activity and some nutritional ingredients of hydroponic water spinach by supplying urea nitrogen as the only nitrogen source. The results indicated that appropriate quantity of nickel could enhance the growth, urease activity and amino acids synthesis of water spinach, while excessive nickel was toxic to water spinach. The treatment of 20 μg/L nickel resulted in the highest fresh weight of water spinach, 12.1% higher than that in control, while significant reduction of water spinach fresh weight was detected with nickel supply higher than 320 μg/L, and significant plant damage symptoms were observed with 1 280 μg/L nickel treatment. This results also showed that appropriate concentrations of nickel （ 20-80 μg/L ） could significantly increase the urease activity up to 13.6%, while the urease content also raised up to 19.0%, but excessive nickel supply （ more than 640 μg/L ） inhibited the urease activity. Physiological anal
ISSN:1004-874X
DOI:10.16768/j.issn.1004-874X.2017.03.008