长沙城郊常见草坪的土壤有机碳和养分含量的相关性研究  

Relationships between Organic Carbon Content and Nutrient Content in Soil of Three Typical Lawns in Changsha City

作　　者：盛浩[1] 李洁[1] 朱海伦[1] 袁红[1] 钱奕琴[1] 

机构地区：[1]湖南农业大学资源环境学院,湖南长沙410128

出　　处：《湖南农业科学》2013年第9期65-68,共4页Hunan Agricultural Sciences

基　　金：湖南农业大学引进人才项目(11YJ20);湖南农业大学大学生创新性实验计划项目(XCX1149)

摘　　要：选取3种长沙城郊常见草坪(狗牙根、台湾青和马尼拉)为试验地,研究草坪土壤有机碳和养分含量的相互关系。结果表明,草坪土壤有机碳、全氮和全磷含量整体偏低,1 m深平均含量分别仅为5.34、0.56和0.44 g/kg,全钾、有效磷和速效钾含量中等,平均含量分别为15.6 g/kg、6.6 mg/kg和85.3 mg/kg。其中,全钾含量在土壤垂直分布上没有明显差异;而有机碳和其他养分含量以0～20 cm土层相对最高,在40～100 cm土层基本稳定。土壤有机碳与养分含量的关系复杂,与全氮、全磷的含量呈极显著正相关,与有效磷和速效钾的含量呈显著正相关,但与全钾含量无显著相关性。针对有机碳和养分含量偏低的草坪土壤,管理中应重视有机物(剪除草屑和有机肥)归还和科学补充化肥。Three typical lawns(bermudagrass,Taiwan green and manilagrass) were selected in the outskirts of Changsha City to study the relationship between organic carbon content and nutrient content in soil.The results indicated that the organic carbon content,the total nitrogen content and the total phosphor content in soil of the lawns were generally low,and the average content of them at 1 m depth only were 5.34,0.56 and 0.44 g/kg,respectively;the total kalium content,the available phosphor content and the available kalium content were all moderate,and the average content of them were 15.6 g/kg,6.6 mg/kg and 85.3 mg/kg,respectively;among them,the total kalium content had no significant difference in vertical distribution in soil,but the organic carbon content and the content of the other nutrients were relatively high in 0～ 20 cm soil layer and basically stable in 40～100 cm soil layer.The organic carbon content had a complex relationship with the content of nutrients,such as it showed a extremely significant positive correlation with the contents of total nitrogen and total phosphor,a significant positive correlation with the contents of available phosphor and available kalium,but non significant correlation with the content of total kalium.Therefore,according to the lawns which had low content in organic carbon and nutrients,it should pay attention to return organic matters(clipped grass and organic fertilizer) and replenish chemical fertilizer rationally.

关 键 词：草坪土壤 有机碳含量 相关性 园艺管理 

分 类 号：S[农业科学]