【作者】 何萍； 金继运； 王秀芳； 王立春； 谢佳贵； 张国刚；

【Author】 He Ping;Jin Jiyun;Wang Xiufang;Wang Lichun;Xie Jiagui;Zhang Guogang;Soil and Fertilizer Institute, Chinese Academy of Agricultural Sciences;Soil and Fertilizer Institute, Jilin Academy of Agricultural Sciences;

【机构】 中国农业科学院土壤肥料研究所； 吉林省农业科学院土壤肥料研究所；

【摘要】 采用田间试验研究氮肥用量对高淀粉玉米和普通玉米吸氮特性及籽粒品质产量的影响。结果显示,与普通玉米相比,高淀粉玉米郑单21氮素最大吸收速率比较大,最大速率出现日期早。成熟期郑单21的吸氮总量明显高于四密25,但其籽粒产量却低于四密25。郑单21籽粒中的氮素更多依赖于后期的根系吸收,而较少来源于前期营养体的氮素转移;高淀粉玉米郑单21含有较高的淀粉含量、粗蛋白含量,但脂肪酸含量却较低。淀粉、粗蛋白和脂肪酸含量随施氮量的增加而增加,过量施氮则其含量下降。更多还原

【Abstract】 Field experiments were conducted to study the effect of N application rate on N uptake, grain yield and quality of high-starch corn and traditional corn. Results showed that high-starch corn(Zhengdan No. 21) had a greater maximum N uptake rate and appeared earlier in high-starch corn than traditional corn. In the maturity stage the total N uptake of Zhengdan No. 21 variety was significantly more than Simi No.25 variety. More N uptake of Zhengdan No. 21 variety came from root uptake in late stage but less from N transformation in early vegetation. For high-starch corn, Zhengdan No. 21 variety had higher starch content and protein content, but it had lower fat content. The content of starch, crude protein and fat increased with increase of N application rate but excess N application led to their decrease.更多还原