Abstract:

To investigate the effect of kitchen organic fertilizer on the physical and chemical properties of soil in protected vegetable fields, field experiments were conducted using commercial organic fertilizer as a control. The results showed that applying kitchen organic fertilizer could increase vegetable yield by 5.3%-11.6%, with no significant difference in yield increase compared with the commercial organic fertilizer. Kitchen organic fertilizer can increase the soil organic matter content of protected vegetable fields by 25.5%-31.8%, soil available N content by 8.6%-11.3%, soil available P content by 3.1%-12.6%, and soil available K content by 6.5%-8.2%. However, there was no significant difference between kitchen organic fertilizer and commercial organic fertilizer treatments. The total soluble salt content of vegetable soil treated with kitchen organic fertilizer increased by 4.0%-5.8%, but there was no significant difference between kitchen organic fertilizer and commercial organic fertilizer treatments. Kitchen organic fertilizer increased the content of soil water stable macroaggregates (R_0.25) by 9.9-14.5 percentage points, and there was no significant difference between kitchen organic fertilizer and commercial organic fertilizer treatments. Overall, the fertilizer efficiency of kitchen organic fertilizers was basically similar to that of ordinary commercial organic fertilizers. Kitchen organic fertilizer increased the content of organic matter, available nutrients, and water stable large aggregates (R_0.25) in the soil of protected vegetable fields, and its effect was basically similar to that of commercial organic fertilizers. Kitchen organic fertilizers caused a small increase in the total soluble salt content of the soil, but the increase was not significantly different from commercial organic fertilizers.

Key words: kitchen organic fertilizer, protected vegetable plot, soil physical and chemical properties, soil water stable aggregates