摘要
通过田间试验比较了不同冬小麦夏玉米品种 (系 )之间氮营养效率的差异。结果表明 ,3个冬小麦品种 (系 )中 ,93132具有较高的基础产量 ,而农大 95对氮肥反应最为敏感 ;3个夏玉米品种 (系 )中 ,西玉 3号不仅具有较高的基础产量 ,而且对氮肥的反应较好。冬小麦夏玉米不同品种 (系 )间最佳产量和最佳施氮量有较大差异。从施肥经济效益分析 ,冬小麦以农大 95最佳 ,夏玉米以西玉 3号最高。在 180 kg.hm-2 施氮水平下 ,冬小麦农大 95和夏玉米西玉 3号氮肥利用率较其他品种 (系 )分别高 10 .5～ 11.0个百分点和 13.9～18.7个百分点 ,这说明选择氮高效作物品种 (系 )提高氮肥利用率有很大的潜力 。
The difference in nitrogen efficiency was studied for three winter wheat varieties and three summer corn varieties in field experiment. The results indicated that among three winter wheat varieties, 93132 had higher basic yield and Nongda 95 was more sensitive to nitrogen fertilizer; and for three summer corn varieties, Xiyu 3 had higher basic yield and better response to nitrogen fertilizer. There were a large difference in optimum yield and optimum rate of N fectiliger among different varieties, and Nongda 95 and Xiyu 3 had higher economic profit. N recovery of Nongda 95 and Xiyu 3 had increased by 10.5～11.0 and 13.9～18.7 in percentage respectively companed to other winter wheat or summer corn varieties. These results showed that it is a great potential and feasibility to improve nitrogen recovery by selecting the crop carieties with high nitrogen efficiency.
出处
《中国农业大学学报》
CAS
CSCD
北大核心
2000年第1期80-83,共4页
Journal of China Agricultural University
基金
北京市自然科学基金
