华北农学报2017，Vol.32Issue(3)：214-219,6.DOI:10.7668/hbnxb.2017.03.33
不同氮素用量对甜荞麦干物质和养分积累及分配的影响
Effects of Nitrogen Fertilizer Rate on Dry Matter and Nutrient Accumulation and Distribution of Buckwheat
摘要
Abstract
In order to explore the suitable nitrogen application,the influence of dry matter and nutrient element accumulation and distribution under different N application levels on buckwheat was studied.Field experiment was conducted under different N application rates N0,N1,N2,N3 and N4(0,30,60,90,120 kg/ha).The results showed that buckwheat dry matter first increased and then dropped with the increment of nitrogen application rate.When the nitrogen application rate was N2,the buckwheat dry matter reached the highest.But when the nitrogen application rate was N3 ,the seeds dry matter and distribution rate reached the highest.The results also showed that seeds nitrogen,phosphorus and potassium contents first increased and then dropped with the increment of nitrogen application rate.When the nitrogen application rate was N3 ,the seeds nitrogen,phosphorus and potassium contents reached the highest.The seeds nitrogen,phosphorus and potassium distribution rate increased with the increment of nitrogen application rate,but it decreased in stems and leaf.The amounts of nutrients which needed for the formation of 100 kg seeds of buckwheat were N 7.09 kg,P2O5 4.15 kg,K2O 8.74 kg and the rate was 1.00∶0.59∶1.24.The production efficiency of N,P2O5,K2O first increased and then dropped with the increment of nitrogen application rate.When the nitrogen application rate was N3 ,the production efficiency of N,P2O5,K2O reached the highest.With the increase of the amount of nitrogen fertilizer, the dry matter production efficiency of nitrogen and phosphorus first increased, then decreased, and then increased.The dry matter production efficiency of potassium gradually increased, and the production efficiency of N4, nitrogen, phosphorus and potassium dry matter reached the highest level.Considering the buckwheat dry matter and nutrient element under the experimental conditions,N application rate of 90 kg/ha identified to be the suitable amount.关键词
氮素用量/甜荞麦/干物质/养分/积累与分配Key words
N application rates/Buckwheat/Dry matter/Nutrient element/Accumulation and distribution分类
农业科技引用本文复制引用
侯迷红,刘景辉,杨恒山,纪凤辉,宋桂云,孙德智..不同氮素用量对甜荞麦干物质和养分积累及分配的影响[J].华北农学报,2017,32(3):214-219,6.基金项目
内蒙古自然科学基金项目(2016MS0335) （2016MS0335）
自治区应用技术与开发资金计划项目(201602050) （201602050）
内蒙古民族大学科学研究项目(NMDYB1443) （NMDYB1443）
