小麦蚕豆间作下氮素营养水平对小麦硅营养的影响  

Effect of Nitrogen Supply Levels on the Silicon Nutrition of Wheat in Wheat-faba Bean Intercropping

作　　者：赵平[1] 鲁耀[2] 董艳[1] 汤利[1] 郑毅[1] 

机构地区：[1]云南农业大学资源与环境学院,昆明650201 [2]云南省农业科学院农业环境资源研究所,昆明650205

出　　处：《西北农业学报》2010年第2期78-84,共7页Acta Agriculturae Boreali-occidentalis Sinica

基　　金：国家自然科学基金项目(30860157);国家973计划前期研究专项项目(2008CB117011);云南省教育厅基金项目(A3003065)

摘　　要：通过盆栽试验,研究了小麦蚕豆间作条件下4种施氮水平(0、162.5、325和487.5 mg/kg)对不同生育期小麦硅含量、硅累积量和累积速率、硅分配的影响。结果表明,间作显著提高了抽穗期和成熟期小麦叶片、茎中硅含量和小麦地上部植株硅的累积量。与单作相比,间作小麦平均硅累积量在分蘖期、拔节期、抽穗期和成熟期分别提高了33%、41%、51%和18%,说明间作对硅的吸收累积具有显著优势。分蘖期、拔节期和抽穗期间作小麦硅的吸收速率显著高于单作。施氮会减少小麦叶片、茎和穗中硅的含量,但间作能明显缓解由于施氮引起的小麦叶、茎硅含量的下降趋势。施氮对小麦硅累积量和硅的吸收速率也有显著影响,单作和间作小麦硅累积量和吸收速率随氮肥用量的增加而增加。小麦蚕豆间作显著提高了硅在小麦叶、茎中的分配比例,施氮水平对小麦穗中分配比例的影响与叶和茎不同。Pot experiment was conducted to investigate the effects of different nitrogen application rate（0,162.5,325,487.5 mg/kg） on Si contents,Si accumulation and rate of Si uptake,the proportion of Si accumulation of wheat in wheat-faba bean intercropping.The results showed that the contents of Si in leaves and stems,the amount of Si accumulation in plants of wheat were significantly increased during heading stage and maturing stage with intercropping.In comparison with monocropping,the amount of Si accumulation of wheat was increased by 33%,41%,51% and 18% at tillering,elongating,heading and maturing stages respectively intercropping.The rate of Si uptake,the proportion of Si distributed in leaf and stem of wheat in intercropping were also significantly higher than that of monocropping.The contents of Si in leaves,stems and panicle of wheat were significantly decreased with nitrogen application rate increased.The tendency of Si content decrease in leaves and stems of wheat was weakened due to wheat-faba bean intercropping.

关 键 词：小麦蚕豆间作 硅素营养 施氮水平 

分 类 号：S512.1[农业科学—作物学]