摘要
以连作 3 年辣椒的土壤为研究对象,通过增施有机堆肥,测定辣椒连作土壤pH、电导率、有机质、有机碳、全碳、养分含量和酶活性的变化特点,探讨有机堆肥用量对连作辣椒土壤化学性状的改良效果.结果表明:有机堆肥 1.5×104 kg/hm2 与复合肥 7.5×102 kg/hm2 混合施入辣椒连作土壤后,土壤pH较对照提高了 0.89(P<0.05),土壤有机质较对照土壤提高了 5.25 g/kg(P<0.05),矿质营养元素氮、磷、钾、钙、镁、硅含量均显著增加(P<0.05),脲酶、蛋白酶、酸性磷酸酶、氧化氢酶的活性均显著增加(P<0.05).综上,增施有机堆肥改善了土壤化学性状,提高了土壤肥力和土壤酶活性,能够有效改良辣椒连作土壤.
Abstract
Taking the soil of continuous cultivation of chili peppers for 3 years as the research object,the changes in pH,electrical conductivity,organic matter,organic carbon,total carbon,nutrient content,and enzyme activity of the soil were measured by increasing a mixture of organic fertilizer and composite fertilizer to study the chemical properties of continuous cultivation chili peppers.The results showed that after applying 1.5×104 kg/hm2 of organic compost and 7.5×102 kg/hm2 of composite fertilizer to chili pepper continuous cropping soil,the soil pH increased by 0.89,and the soil organic matter increased by 5.25 g/kg,compared to the control soil(P<0.05).The content of nutrient elements nitrogen,phosphorus,potassium,calcium,magnesium,and silicon significantly increased(P<0.05),and the activities of urease,protease,acid phosphatase,and catalase were significantly increased(P<0.05).In conclusion,there was a positive correlation between the improvement effect of soil chemical traits and the amount of organic compost,increasing the application of organic compost improved soil chemical properties,enhanced soil fertility,and increased soil enzyme activity,which could effectively improve the continuous cropping soil of chili peppers.
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