摘要： 为探明马铃薯的镁营养特性,进而丰富马铃薯的栽培理论,同时为生产中合理施用镁肥提供科学依据和技术支撑,通过田间试验和室内测定分析,研究了马铃薯镁的吸收、分配规律.结果表明:马铃薯全生育期各器官镁含量基本为叶>茎>根及块茎;全株镁的累积吸收量随生育进程的推进呈二次曲线变化,在出苗后(31～0 d)(块茎形成期)镁阶段吸收量达到最大值;马铃薯生育期间对镁的吸收速率最大值出现在块茎形成期(出苗后31～0 d);马铃薯随生育时期的推进和生长中心的转移,镁在马铃薯各器官的分配也发生相应的变化,全生育期镁在各器官的分配以叶、茎为主;根与块茎很少,收获时镁主要贮存在茎与叶中.在该试验产量水平下,平均每生产1 000 kg块茎需吸收镁元素3.860 kg.

关键词: 马铃薯, 镁, 吸收

Abstract: By analyzing the data derived from field test and the indoor test,the potatoes′magnesium absorption and distribution regular pattern was studied.The results showed:During all the growth stages,the magnesium content in different organs were:leaves > stems>roots (or tubers).As the growth stage advanced,the accumulated absorption of magnesium in the whole plant met a curve of quadratic function,and the maximum quantity of stage absorption appeared in the stage of tuber initiation(between 31 to 40 days after the seedlings emergence);with the advancement of growth stages and the switch of growth center,the distribution of magnesium in different organs changed as well,during all the growth stages,magnesium mainly distribute to leaves and stems but few to roots and tubers,and magnesium was stored in stems and leaves mainly when it was harvested.To achieve the yield level of this study,3.860 kg magnesium was needed to be absorbed to produce 1 000 kg tubers.

Key words: Potato (Solanum tuberosum L.), Magnesium, Absorption

中图分类号: 

• S143.7