摘要
以河北省沧州南大港盐碱湿地3种农作物种植区(苜蓿、棉花、玉米)和自然生长的芦苇区的土壤为研究对象,测定并分析了土壤理化因子和土壤酶活性的空间分布及变化规律,比较了4种不同土地利用方式对它们的影响及其对盐碱土壤的改良作用。结果表明,南大港湿地土壤盐碱化较为严重,较之苜蓿和天然芦苇,农业耕作下棉花和玉米采样点的土壤pH值较低,有机质、全氮、硝态氮、铵态氮和全磷含量相对较高;与土壤肥力相关的碱性磷酸酶、脱氢酶和FDA水解酶等活性也相应提高。研究表明农作物种植能够降低南大港滨海土壤酸碱度并提高营养物质含量,对改良土壤有明显促进作用。
The effects of four types of land utilization （i. e. cotton growing area, corn growing area, alfalfa growing area and nat- ural reed area） on physic-chemical factors and enzymatic activities in soil of Nandagang wetland were investigated in order to im prove the property of saline alkaline soil. Results showed that the soil salinization in Nandagang wetland was severe. Compared to the alfalfa area and the natural reed area, pH was lower in the cotton and the corn area. Soil organic matter, total nitrogen, nitrate nitrogen, ammonium nitrogen, and total phosphorus （TP） were also relatively higher. Activities of alkaline phosphatase, dehy- drogenase, and FDA hydrolase also were enhanced accordingly, which were related to high soil fertility. The crops could reduce the soil pH of Nandagang saline-alkline land, increase the level of nutrients, and improve soil quality obviously.
出处
《重庆师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2013年第1期95-100,共6页
Journal of Chongqing Normal University:Natural Science
基金
国家公益性行业(农业)科研专项经费项目(No.201103005)
关键词
南大港
盐碱地
土地利用方式
土壤理化性质
土壤酶
Nandagang
saline-alkaline land
land utilization type
physic-chemical property
soil enzyme
