Effects of nitrogen fertilizer combined with organic fertilizer on soil microbial flora,enzyme activity and yield of dryland wheat in semi-arid area
[Objectives]The paper aimed to explore the effects of nitrogen fertilizer combined with organic fertilizer on soil microbial quantity,enzyme activity and yield of winter wheat in dryland of semi-arid area,and to clarify the effects of different fertilization on soil activity and yield.[Methods]In 2021,a combination of field experiment and laboratory experiment was used to set up four fertilization treatments:no fertilization(0 kg·hm-2 urea,F1),single application of nitrogen fertilizer(150 kg·hm-2 urea,F2),single application of organic fertilizer(30 t·hm-2 organic fertilizer,F3),and nitrogen fertilizer combined with organic fertilizer(150 kg·hm-2 urea+30 t·hm-2 organic fertilizer,F4).Field experiments were conducted to study the changes of soil microbial quantity,enzyme activity,yield and their correlation under different treatments.[Results]Compared with no fertilization treatment,each fertilization treatment could significantly increase the number of soil bacteria(26.24％-85.82％)and actinomycetes(13.94％-47.60％),reduce the number of fungi(26.39％-52.78％),and increase the activities of urease,sucrase,phosphatase and catalase(3.92％-30.49％,42.06％-133.71％,12.38％-26.34％,173.6％-284.21％).The yield of nitrogen fertilizer combined with organic fertilizer treatment was up to 2 516.43 kg·hm 2,which was 55.51％higher than that of no fertilizer treatment,and 16.20％higher than those of single nitrogen fertilizer and single organic fertilizer.[Conclusions]Nitrogen fertilizer combined with organic fertilizer was more conducive to increasing the number of soil microorganisms and related enzyme activities in wheat fields in semi-arid areas,improving soil environment,improving soil fertility,and thus increasing wheat yield.
万方数据
维普
