Effects of Combined Application of Reduced Fertilizer and Biogas Manure on Summer Maize Growth and Acidic Soil Improvement

摘要

[Objectives] A field experiment was carried out with biogas manure replacing partial chemical fertilizer to discuss the effects on growth and development of summer maize and soil environment,so as to provide theoretical basis for efficient utilization and zero growth of chemical fertilizer. [Methods]The summer maize field experiment was carried out in Muping District,Yantai City,with conventional fertilization as control,and sole application of biogas manure,biogas manure + 80% chemical fertilizer and biogas manure + 60% chemical fertilizer as three treatments. Growth indices,yield and yield components of summer maize and soil nutrient utilization status were determined. [Results] On the basis of reduced fertilizer application,the application of biogas manure could significantly promote growth of summer maize,and its plant height,stem diameter,ear position and dry weight per plant significantly increased compared with the CK. Remarkable yield increasing effect was obtained on summer maize,and among the various treatments,treatment BM + CF80 had the highest yield,which was 19. 91% higher than the CK. Furthermore,the combined application of biogas manure and chemical fertilizer not only could improve soil acidity( soil pH was improved by 0. 12 unit),but also could improve soil rapidly available potassium content and reduce soil alkali-hydrolyzable nitrogen content. [Conclusions]Comprehensively,combined application of biogas manure and 80% of chemical fertilizer is the best for growth and development of summer maize and improvement of soil character.