有机、特别与常规栽培对八种蔬菜土壤养分和酶活性的影响

通过田间试验比较了有机、特别与常规栽培对8种蔬菜土壤基本养分和土壤酶活性的影响。结果表明,与常规栽培相比,有机栽培和特别栽培能够提高土壤有机质、全氮、速效磷和速效钾含量,改良酸性土壤,并显著提高了土壤酶活性。有机栽培蔬菜土壤过氧化氢酶、脲酶、转化酶和酸性磷酸酶活性均显著高于常规栽培。特别栽培的各项土壤指标基本介于有机和常规之间。研究表明有机栽培能够提高土壤养分和土壤酶活性。

Effects of Organic,Special and Conventional Farming on Soil Nutrients and Enzyme Activities under Eight Kinds of Vegetables

A field experiment was carried on to evaluate the effects of farming systems on soil fertility and soil enzyme activities with eight kinds of vegetables.The results showed that,compared with conventional farming systems,the organic matter,total nitrogen,available P and available K were increased under organic and specially grown farming system.The soil pH was increased near neutral in organic farming system,but decreased in special and conventional farming systems.Activities of soil enzymes were obviously increased,under organic farming system while those under specially grown system were lower than organic farming system but much higher than conventional farming.The trend of soil catalase activity,soil urease activity,soil invertase activity and soil acid phosphatase activity were generally the same.It showed that organic farming did improve soil nutrients and enzyme activity significantly.