Abstract:

The purpose of this research was to optimize the conventional fertilization method in North China Plain, and to fully and rationally utilize the organic fertilizer unused and wasted. The study was carried out in china agricultural university’s testing station located in Wuqiao County, Hebei Province. Under the condition of the same N fertilizer application rate and the traditional farming method, chemical fertilizer (CF), organic fertilizer + chemical fertilizer (OF+CF) and straw biological fertilizer + chemical fertilizer (SF+CF) were applied to the treatment of winter wheat, in order to study the influence of fertilization treatments on wheat’s yield components and physiological property, and on SPAD values in leaves, and the correlation between SPAD values and total N content in leaves. The results show that the treatments of OF+CF and SF+CF were better than CF, and they can increase soil nutrient content and the nitrogen content on aerial part of winter wheat. Compared to CF, the wheat yields in the processing of OF+CF and SF+CF increased 3.63% and 2.11%, respectively. The probable reasons for that might be the increase of the nitrogen content in leaves could improve their photosynthesis capacity, and treatments of OF+CF and SF+CF could slow the releasing rate of fertilizer, which would delay leaf senescence.