【作者】 吕世华； 张西科； 张福锁； 刘文菊；

【Author】 Lu Shihua Zhang Xike Zhang Fusuo Liu Wengju( Soil and fertilizer institute, Sichuan Academy of Agriculture Sciences, Chengdu 610066,Department of Resource and Environment, Hebei Agricultural University, Boding 071000,Department of Plant Nutrition, China Agricultural University, Beijing 100094)

【机构】 四川省农业科学院土肥所； 河北农业大学资源与环境系； 中国农业大学植物营养系；

【摘要】 在采用土—砂联合培养方法和不同水分管理措施形成不同厚度根表铁、锰氧化物胶膜的试验植株基础上,再进行营养液试验研究根表铁、锰氧化物胶膜对不同锌浓度营养液中锌吸附量和植物锌吸收量的影响。试验表明,水稻根表铁、锰氧化物胶膜数量受土壤水分状况影响,长期淹水条件有利于铁、锰胶膜的形成,而土壤通气好的湿润和干湿交替处理下根表铁、锰胶膜形成量较少。水稻根表铁、锰胶膜对介质中锌的吸附量随锌浓度的增加而增加,但本试验条件下水稻根表铁、锰胶膜对锌的吸附量与胶膜厚度无明显关系,植株对锌的吸收量也与水稻根表铁、锰胶膜数量无明显关系,其原因可能与本试验中水稻根表铁、锰胶膜数量总体上偏低有关。更多还原

【Abstract】 Rice plants with ferric and manganese hydroxide plaque on root surface (FMHPRS) in different thickness, which resulted from soil-sand culturing and different soil water regime, were transferred to nutrient solution with different Zn concentration to study the impact of FMHPRS on Zn uptake.The results show that thd FMHPRS is affected by the soil moisture regime, the plaque is very thick under the long-term flooding condition, while it is very thin on the condition of humidity or wet and dry alternating; the amount of zinc uptake by the FMHPRS from the medium increases with the incresing the zinc dcncentration in the medium; but thd amount of FMHPRS Zn is no relationship with the thickness of FMHPRS under the experimental condition, and the uptake Zn amount by rice plants is also no relationship with the amount of FMHPRS. The main reason is possibly the lower amount of FMHPPRS in this experiment.更多还原