基于临界氮浓度的滴灌春小麦氮素营养诊断  

Nitrogen Nutrition Diagnosis Based on the Critical Nitrogen Concentration of Drip Irrigation Spring Wheat

作　　者：彭新新 刘其[1] 王江丽[1] 刁明[1] 

机构地区：[1]新疆生产建设兵团绿洲生态农业重点实验室/石河子大学农学院,新疆石河子832000

出　　处：《麦类作物学报》2015年第7期1009-1015,共7页Journal of Triticeae Crops

基　　金：国家科技支撑计划项目(2012BAD42B03)

摘　　要：为了准确定量诊断滴灌春小麦氮素营养状况,以新春6号为指示品种,分别设置5个施氮水平,研究了新疆北疆地区滴灌春小麦临界稀释氮浓度曲线。结果表明,根据滴灌春小麦地上部干物质与对应氮浓度值,可构建出临界氮浓度幂指数函数为NC=5.03 W-0.38,相关系数R2=0.95。基于临界氮浓度建立的氮素营养指数模型能对滴灌春小麦氮素营养状况进行比较准确的诊断。In order to diagnose nitrogen nutrition accurately,calculate and validate the critical dilute nitrogen concentration curve of spring wheat（Xinchun 6）in the north of Xingjiang,an experiment with 5nitrogen treatments was carried out.The results showed that there existed a negative power function correlation between maximum dry matter weight aboveground and critical nitrogen concentration,i.e.NC= 5.03W-0.38,while R2=0.95.Based on the critical nitrogen concentration nitrogen nutrition index model was established to accurately judge the nitrogen situation of spring wheat.

关 键 词：春小麦 植株氮浓度 临界氮稀释曲线 氮素营养指数 

分 类 号：S512.1[农业科学—作物学] S311