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.
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.
[1] 宋传俊,叶斌.水稻缺镁症及镁肥试验效果初报[J].土壤肥料,2003(1):41-42.
[2] 李小燕,刘志华,李巧玲,等.几种微量元素在露地葡萄上的应用[J].内蒙古农业科技,2002(S2):20-21.
[3] 郑宝辉,赵清友,邹积田,等.晶体硼镁肥在苹果上的应用效果试验[J].内蒙古农业科技,2006(7):220,223.
[4] 高志红,陈晓远,张世龙.硫酸钾镁肥对水稻生长、产量和品质的影响[J].华北农学报,2008,23(3):194-197.
[5] 郭金丽,张相文,张姝媛,等.盛果期金红苹果树(GM-(256)中间砧)矿质营养及施肥研究[J].华北农学报,2008,23(6):195-198.
[6] 吴英.镁在大豆营养中的作用[J].大豆科学,1998,17(2):162-165.
[7] 李春花,杨清.华北石灰性土壤镁硼钼配合施用对花椰菜、菜豆的增产作用[J].土壤肥料,1996(5):33-35.
[8] 韦翔华,白厚义,陈佩琼.氮、钾、镁营养对烟草产量和产值的效应研究[J].广西农业生物科学,2000,19(2):77-80.
[9] 黎香兰,郝丽珍,张受远,等.复合微肥在蔬菜上应用效应的初探[J].内蒙古农业科技,1990(6):25-27.
[10] 王凤文.施用微肥对洋葱品质的影响[J].内蒙古农业科技,2009(2):52-54,86.
[11] 郝文胜,曹亚利,杨海鹰,等.我国马铃薯脱毒小薯生产研究进展(II)[J].内蒙古农业科技,2005(专辑):48-51.
[12] 蒙美莲,胡志全,刘梦芸,等.马铃薯空心块茎解剖结构及营养特点[J].华北农学报,2000,15(1):42-46.
[13] 杜长玉,高明旭,刘全贵.不同微肥在马铃薯上应用效果的研究[J].内蒙古农业科技,2000(1):20-21,23.
[14] 吴旭银,张淑霞,吴贺平,等.马铃薯(克新1号)地膜覆盖栽培钙镁硫吸收特性[J].河北科技师范学院学报,2005,19(4):28-31.
[15] 南京农业大学.土壤农化分析[M].第2版.北京:农业出版社,1983:219-222.
