安徽农业科学2009，Vol.37Issue(22)：10456-10460,10475,6.
不同装土量对玉米植株·根系·籽粒养分浓度及化学计量比的影响
Effects of Different Soil Amounts on Nutrients Concentration and Stoichiometry of Maize Plant, Root and Seed
摘要
Abstract
[Objective] The paper aimed to study the effects of different soil amounts on the nitrogen concentration, phosphorus concentration and N∶P stoichiometry of Maize Plant, root and seed in weeding stage, heading stage and maturity stage. [Method] Outdoor pot simulation experiment was adopted. [Result] From seedling stage to maturity, nitrogen and phosphorus concentrations of Maize plants display a downward trend; phosphorus concentrations have increased with increment of packing soil amounts in weeding stage; regardless of fertilization or not, N∶P show downward trend with increment of packing soil amounts at the same period, nitrogen takes on the relative shortage. From seedling to maturity, nitrogen concentration of Maize roots takes on a downward trend, nitrogen concentration decreases with increment of packing soil amounts; phosphorus concentration of seedling stage is higher than that of heading stage and maturity stage, phosphorus concentrations is mild or severe deficiency; N∶P ratio is decreased in seedling stage, while there is an upward trend in heading stage. Nitrogen concentration of Maize grain is higher in seedling stage; nitrogen concentration and phosphorus concentration of Maize grain after fertilization take on downward trend with increment of packing soil amounts; N∶P ratio is different under different packing soil amounts.[Conclusion] Different effective soil amount resulting from "wave type" and "flat type" under the current cultivation system is one of the main reasons that causes fertility degradation of the black soil in Song-liao Plain maize belt.关键词
现行耕作制/不同装土量/氮浓度/磷浓度/化学计量比Key words
Current cultivation system/Different soil amounts/Nitrogen concentration/Phosphorus concentration/Stoichiometry分类
农业科技引用本文复制引用
杨有德,李月芬,赵兰坡,徐倩,孙超,施宪..不同装土量对玉米植株·根系·籽粒养分浓度及化学计量比的影响[J].安徽农业科学,2009,37(22):10456-10460,10475,6.基金项目
国家自然科学基金项目(30370846) （30370846）
吉林省科技厅重点项目(20040204-1-1) （20040204-1-1）
国家粮食丰产工程项目(2004BA520A09). （2004BA520A09）
