作　　者： ; ; ; ; ; (董喜光）;

机构地区： 华南农业大学

出　　处： 《中南林业科技大学学报》 2016年第9期104-108,113,共6页

摘　　要： 以广东省云勇林场火力楠人工林为试验对象,采取CK(对照)、施N、施P和施N+P 4种处理,研究模拟氮和磷沉降对其土壤特性的影响。研究结果表明:加N显著增加了土壤全N、有效N、有效P和有效K含量,加P显著提高了土壤有机质、全N、全P、有效P和速效K含量,加N+P提高了土壤有机质、全N、有效N、有效P和有效K含量;施N、施P和施N+P 3种处理显著增加了土壤细菌、真菌和放线菌数量及脲酶和磷酸酶活性;加P处理还增加了土壤过氧化氢酶活性。 Continuously increasing atmospheric N deposition and P fertilization profoundly influence forest soils. Changes in soil characteristics after simulating N and P deposition were studied in a Michelia macclurel plantation in Yunyong Forest Farm, Guangdong province to provide basis for soil management ofM. macclurel plantations. N and P addition was designed as ck, N addition, P addition, and N＋ P addition treatments. The results showed that N addition significantly increased soil total N, effective N, effective P and effective K contents; P addition significantly increased soil organic matter, total N, total P, effective P and effective K contents; N＋P addition significantly increased soil organic matter, total N, effective N, effective P and effective K contents. The N, P and N＋P addition treatments significantly increased the numbers of soil bacteria and fungi and actinomycetes, and activities of soil urease and acid phosphatase, and besides, P addition significantly increased catalase activity.

关 键 词： 火力楠 外源性氮和磷 土壤化学性质 土壤酶 微生物

领　　域： [农业科学]