Effects of Bio-organic Fertilizer on Rice Growth and Yield Under Water Regulation
The experiment was conducted to investigate the effects of bio-organic fertilizer with chemical fertilizer technology on the growth and yield of rice under different irrigation modes using a plot test method.Two irrigation modes(F:flooded irrigation,C:controlled irrigation)and three fertilizer modes(A:full application of chemical fertilizers,B:bio-organic fertilizer with equal nitrogen replacing 15%chemical nitrogen fertilizer,C:bio-organic fertilizer with equal nitrogen replacing 30%chemical nitrogen fertilizer)were set up to study the effects of different treatments on rice growth traits and yield.The results showed that under the same irrigation mode,bio-organic fertilizer increased the number of grains per panicle and the dry matter mass of the panicle,but had little effect on rice plant height and chlorophyll.Compared with the full application of chemical fertilizer,there was no significant difference in yield and net profit of bio-organic fertilizer with equal nitrogen replacing 15%chemical nitrogen fertilizer.However,a higher proportion of bio-organic fertilizer slightly reduced rice yield and increased fertilizer input cost,resulting in a significant decline in the ratio of output to input.Under different irrigation modes,controlled irrigation suppressed unproductive tillering but reduced plant height and dry matter mass of rice.Compared with conventional flooding irrigation,yields were slightly lower by 0.5%～1.2%under controlled irrigation,but improved irrigation water use efficiency and net returns.It is concluded that the use of bio-organic fertilizer,which replaces 15%of the chemical nitrogen fertilizer under the controlled irrigation mode can avoid the excessive application of chemical nitrogen fertilizer,ensure rice production and high economic benefits under the condition of improving irrigation water utilization efficiency.
万方数据
维普
