作　　者： ; ;

机构地区： 山西农业大学

出　　处： 《腐植酸》 2011年第4期6-9,共4页

摘　　要： 本试验进行了腐植酸肥对土壤微生物活性与土壤速效养分影响的研究。试验在温室条件下,采用盆栽饲草高粱法,设腐植酸肥、化肥和对照(CK)3个处理。试验表明:抽穗期,腐植酸肥处理的土壤细菌数比化肥处理高45.58%;拔节期和抽穗期,腐植酸肥处理的土壤放线菌数比化肥处理高28.57%和43.58%,土壤真菌数比化肥处理高23.26%和20%。结果表明,施用腐植酸能改善土壤脲酶和磷酸酶的活性,提高土壤有效养分的时效性,改善植物营养。 In this paper, the pot experiment was conducted to study the effects of humic acid fertilizer on soil microbial activity and soil available nutrients under the condition of growing forage sorghum in greenhouse. The experiment had three treatments including no fertilizer （CK）, chemical fertilizer, and humic acid fertilizer. The results showed that the quantity of soil bacteria in humic acid fertilizer treatment was higher by 45.58% than that in chemical fertilizer treatment at heading stage. In the stages ofjointing and heading, the quantity of soil actinomycetes in hurnic acid fertilizer treatment was higher by 28.57% and 43.58% than that in chemical fertilizer treatment, respectively. And the quantity of soil fungi in treatment with humic acid fertilizer was higher by 23.26% and 20% than that in treatment with chemical fertilizer in jointing and heading stage, respectively. The results also indicated that applying humic acid could increase the activities of soil urease and phosphatase, prolong the timeliness of available nutrient in soil, and improve sorghum nutrient.

关 键 词： 腐植酸 速效养分 酶活性 土壤微生物

领　　域： [化学工程] [农业科学] [农业科学]