期刊论文

Response of water use efficiency of different summer maize cultivars to nitrogen fertilizer and precipitation

中文

干旱地区农业研究

1000-7601

2008

01

51-57

国家自然科学基金项目（30471015,30571089）；

本校为第一机构

以郑单958与农大108为材料，在3种类型氮肥、3个施氮水平条件下，连续两年（2004～2005）研究了华北平原夏玉米水分利用效率（WUE）对氮肥与降水量的响应。结果表明，（1）在施N0～180kg／hm^2范围内，夏玉米WUE随施氮量增大而增大，且不同氮肥类型间有一定差异；（2）WUE具有明显的基因型差异，在施氮与不施氮条件下均表现郑单958〉农大108；（3）WUE与产量呈极显著正相关，与灌浆期穗位叶光合速率、气孔导度与蒸腾速率呈较明显的正相关关系；（4）WUE存在明显的年际间差异，两品种均表现2005年明显大于2004年，这主要由降水量差异所致。夏玉米生育前期及全生育期降水量的减少使夏玉米产量与耗...

Zhengdan958 and Nongda108 were used as plant materials to study the responses of water use efficiency （WUE） of summer maize to nitrogen fertilizer and precipitation under condition of 3 types of N fertilizer with 3 application rates in North China Plain in successive two years （2004--2005）. The results showed that （1） WUE of summer maize was increased by N rates from 0--180 kg N/hm2 and differences at a certain extent among types of N fertilizer were observed. （2） Evident genotype differences in WUE existed and there showed trend of Zhe...