镁缺乏对黄瓜苗期生长及矿质营养吸收的影响  

Effects of Magnesium Deficiency on the Growth and Assimilation of Mineral Nutrition of Cucumber Seedlings

作　　者：徐雷[1,2,3] 梁林洲[1] 董晓英[1] 沈仁芳[1] 

机构地区：[1]中国科学院南京土壤研究所土壤与农业可持续发展国家重点实验室,江苏南京210008 [2]中国科学院研究生院,北京100049 [3]江西省农业科学院土壤肥料与资源环境研究所,江西南昌330200

出　　处：《江西农业大学学报》2012年第5期899-903,共5页Acta Agriculturae Universitatis Jiangxiensis

基　　金：江苏省自然科学基金重点项目(BK2010097);公益性行业(农业)科研专项课题(200903011);国家自然科学青年基金(41001172);中国科学院知识创新工程重大项目课题(KSCX2-EW-N-08)

摘　　要：通过水培试验研究了镁缺乏对黄瓜苗期生长及磷、钾、钙、镁、铜、锰、铁和锌在根和叶片中含量的影响。结果表明:(1)缺镁显著降低黄瓜根、茎和叶干质量;(2)缺镁对根部磷含量没影响,但显著增加叶片中磷含量,达到2.11%;对根和叶片中钾含量没影响;显著增加根和叶片中钙含量,叶中钙含量可达73.7 g/kg;(3)缺镁显著增加了根和叶片中锰、铁、锌含量,尤其是根部的锰、铁和叶片中的锰、锌分别为对照的2倍以上;缺镁虽显著增加叶片中铜含量,但对根部铜含量无显著影响。The effects of magnesium （Mg） deticlency on the growth and assimilation oi mineral nmrlnon of cucumber seedlings were studied through hydroponic experiment. The results showed that ： under the Mg deficiency stress, （ 1 ） the dry weight of cucumber roots, stems and leaves reduced significantly ; （2） phosphorus concentration increased conspicuously up to 2.11% in leaves, but had no change in roots; potassium concentration did not change in roots and leaves; calcium concentration increased significantly in roots and leaves, it reached 73.7 g/kg in leaves ; （3） the concentration of manganese （Mn） , iron （Fe） and zinc （Zn） increased both in roots and leaves, especially for Mn, Fe concentrations in roots and Mn, Zn concentrations in leaves, they were twice as much as or even higher than those in the control treatments, respectively ; and copper increased in leaves, but had no change in roots, compared with the control.

关 键 词：镁缺乏 黄瓜 矿质营养 

分 类 号：S642.2[农业科学—蔬菜学]