论文部分内容阅读
中国农业大学和德国霍恩海姆大学(HohenheimUniversityofGermany)中德合作项目“华北平原作物高产高生产力条件下环境可承受的持续农业研究”2000～2001年度北京试验基地研究结果的一部分。试验结果表明,优化施肥和秸秆还田优化施肥夏玉米株高、基部节间直径、同一时期叶面积指数、干物质积累量、穗部基本性状,如穗长、穗粗、秃尖长、产量结构及产量与传统施肥无显著性差异,而氮肥利用率显著提高。在优化施肥条件下,夏玉米棒三叶总叶面积略微减少,生育后期穗位叶叶绿素含量下降稍快,吐丝至收获干物质积累量略有下降。秸秆还田有利于改善夏玉米的生育状况和提高产量。
China Agricultural University and HohenheimUniversityofGermany, a part of the research results of Beijing Experimental Base from 2000 to 2001, which is a Sino-German cooperation project of “Sustainable Agriculture Research on Sustainable Environment under High Yield and High Productivity of Crops in North China Plain”. The results showed that plant height, basal internode diameter, leaf area index, dry matter accumulation and basic characters of ear such as spike length, ear diameter, bald length, yield There was no significant difference between the structure and yield and the traditional fertilization, but the nitrogen use efficiency was significantly increased. Under optimized fertilization conditions, the total leaf area of cloverleaves decreased slightly in summer, the chlorophyll content of earleaf leaves decreased slightly at the later growth stage, and the accumulation of dry matter from silking to harvest decreased slightly. Straw return to the field is conducive to improving summer maize fertility and increase production.