The plot experiment was carried out in field to study the effects of different fertilization meth -ods on yield and related plant characters of summer maize .It was found that the application of high -nitrogen compound fertilizer ,controlled-release fertilizer ,optimized NPK fertilizer could increase the plant stem diame-ter, number of green leaves ,1 000-grain weight and single plant productivity ,so the maize yield increased significantly .The treatments of high-nitrogen compound fertilizer and controlled -release fertilizer had more obvious advantages .Their yields increased by 4.5% and 2.5% compared with optimized NPK fertilization , 13 .9% and 11 .7%compared with single nitrogen fertilizer , and 28 .0%and 25 .5%compared with no fertili-zation , respectively .In conclusion , the applications of high -nitrogen compound fertilizer and controlled -re-lease fertilizer were the regulating direction to further simplify the high efficient cultivation of summer maize in southwest Shandong Province .%采用大田小区试验，研究了6种不同施肥模式对夏玉米产量及植株性状的影响。结果表明，施用高氮复合肥、控释复合肥、NPK优化配比处理能够增加植株茎粗和绿叶数，提高千粒重和单株生产力，显著提高玉米产量，高氮复合肥和控释复合肥的优势更为明显，分别较NPK优化配比处理增产4．5％、2．5％，较单施氮肥处理增产13．9％和11．7％，较不施肥处理增产28．0％和25．5％。可见，施用高氮复合肥、控释复合肥是鲁西南夏玉米进一步简化高效栽培的肥料调控方向。
展开▼
