Effect of different cropping patterns on soil fast-acting nutrients and humus fractions
The effects of conventional planting model cauliflower(T0)and organic planting models chili(T1),open-air chili(T2),maize(T3),and cauliflower(T4)on soil fast-acting nutrients and humus fractions in different soil layers were compared based on a long-term positioning experiment.The results showed that the organic planting pattern T3 had the highest average soil fast-acting nitrogen content,at 110.67 mg/kg,with the average content ranked as T3>T2>T1>T0>T4;the average soil fast-acting phosphorus content in patterns T2,T3,and T4 was all lower than T0,with the average content ranked as T1>T0>T2>T4>T3;T2 had the highest average soil fast-acting potassium content,at 275.13 mg/kg,with the average content ranked as T2>T3>T4>T1>T0;T3 had the highest average soil humic acid content,at 1.38 g/kg,with the average content ranked as T3>T2>T4>T1>T0;the average soil fulvic acid content of the four organic planting patterns was all lower than the conventional planting pattern,with the content ranked from high to low as T0>T4>T1>T3>T2.The average content of fast-acting nitrogen,fast-acting potassium,and humic acid in soil under organic planting model was higher than that under conventional planting model.There were correlations between soil humic acid and fast-acting potassium,fast-acting nitrogen and fast-acting potassium(P<0.05).In conclusion,organic planting can significantly improve soil fast-acting nutrients and humus components,and improve soil fertility.
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