【作者】 翟丙年； 袁翠萍； 李生秀；

【Author】 ZHAI Bing-nian , YUAN Cui-ping , LI Sheng-xiu (College of Resources and Environment Science, Northwestern Sci-Tech University of Agriculture and forestry, Yangling 712100 .China)

【机构】 西北农林科技大学资源环境学院；

【摘要】 本文采用田间小区试验研究了渭北旱塬农业生产中现行10个冬小麦品种的氮效率差异。结果表明,在本试验条件下,不同品种对氮素的反应有较大的差别。通过对不同小麦品种的氮素农学效率和响应度的分析,将10个小麦品种分为4种类型,分别为高效高响型、高效低响型、低效高响型、低效低响型。其中小偃22、小偃503为高效高响型品种,这类品种在氮肥供应不足时,也能够获得高产,施氮后增产幅度很大;小偃128、小偃6号为低效低响型品种,该品种施氮与不施氮条件下的籽粒产量与其它供试品种相比都不高,而且增加施氮量对其增产效果也不明显。更多还原

【Abstract】 The field plot experiment was conducted to study the difference of Nitrogen Use Efficiency in 10 winter wheat cultivate (genotype) on the loess plateau. The results showed that there are great different reaction to nitrogen in different cultivals in the condition of this experiment. By analysis of nitrogen fertilizer agronomic efficiency and effect to nitrogen of different varieties, The 10 wheat cultivals were divided into 4 different types , they are high efficiency and high response to N, high efficiency and low response, low efficiency and high response , low efficiency and low response respectively .Among them,Xiaoyan22 and Xiaoyan 503 are high efficiency and high response to N, they can get heigh yield even in the deficiency of nitrogen .the yield was increased greatly after N supply; Xiaoyan128 and Xiaoyan 6 are low efficiency and low response. The grain yield is very low .compare to other varieties in the condition of nitrogen supply and no nitrogen supply, The yield is not increased significantly with the increasing of nitrogen rate .更多还原