氮肥用量对库伦旗荞麦干物质积累与分配的影响  

Effects of Nitrogen Fertilizer Rate on Dry Matter Accumulation and Distribution of Buckwheat in Hure County,China

作　　者：侯迷红[1] 范富[1] 纪凤辉[2] 宋桂云[1] 苏雅乐[1] 孙德智[1] 

机构地区：[1]内蒙古民族大学农学院,内蒙古通辽028043 [2]通辽市土壤肥料工作站,内蒙古通辽028000

出　　处：《内蒙古民族大学学报（自然科学版）》2017年第1期65-69,共5页Journal of Inner Mongolia Minzu University：Natural Sciences

基　　金：内蒙古自然科学基金项目(2016MS0335);内蒙古民族大学科学研究项目(NMDYB1443)

摘　　要：为了掌握甜荞麦适宜施氮量,研究不同供氮水平对甜荞麦干物质积累与分配影响的规律.本试验采用田间小区试验的方法,设置5个氮素水平N_0、N_(30)、N_(60)、N_(90)和N_(120)(下标表示N用量,单位为kg/hm^2),研究了甜荞麦不同器官干物质积累量与分配比例的变化.结果表明,甜荞麦干物质积累总量随着施氮量的增加呈先增后降的趋势,N60处理干物质积累总量最大,但N_(90)处理籽粒中干物质积累量和分配比例最大,不同处理条件下,在各器官中均以茎部干物质分配比例最大.本试验条件下,施氮量90 kg/hm^2为甜荞麦适宜氮肥用量.In order to explore the suitable nitrogen application, the influence of dry matter accumulation and distribution in leaves, stems, flowers and seeds under different N application levels on buckwheat were determined in order to determine suitable nitrogen application rates.Different N rates （N 0 kg/hm2, 30 kg/hm2, 60 kg/hm2 ,90 kg/hm2 and 120 kg/hm2 ） were applied in the field and the changes of buckwheat dry matter accumulation and distribution determined. Total accumulation of buckwheat dry matter first increased and then dropped with the increment of nitrogen application rate. ,The buckwheat dry matter was highest, when the nitrogen application rate was 60 kg/hm2. However, seed dry matter ratio distribution rate was highest when the nitrogen application rate was 90 kg/hm2.Stem dry matter ratio was always the highest under all nitrogen application rates. Considering the buckwheat dry matter under the experimental conditions, N application rate of 90kg/hm2 was identified to be the suitable amount.

关 键 词：氮素用量 甜荞麦 干物质 积累与分配 

分 类 号：S143.1[农业科学—肥料学]