哈同高速筑路废弃地基质肥力特征及其评价

根据来源及主要外部特征对哈同高速沿线筑路废弃地进行了类型划分，同时测定、分析了其理化性质，并对各地类基质综合肥力进行了评价。结果表明：哈同高速筑路废弃地可分为7个类型：砂石料场、岩石边坡、风化石边坡、流沙边坡、采石场废弃地、取土废弃山地及土质边坡。其中砂石料场、岩石边坡、风化石边坡、采石场废弃地基质为紧沙土、多砾，水分状况很差；流沙边坡、取土废弃山地、土质边坡为壤土类、少砾，水分状况较好。除土质边坡外，各地类有机质含量、全氮、碱解氮、有效磷含量很缺乏或严重缺乏，而速效钾大多含量丰富；各地类肥力高低为土质边坡>流沙边坡>取土废弃山地>风化石边坡>砂石料场>岩石边坡>采石场废弃地；有机质、全氮含量、自然含水率是影响各地类肥力的主要因素。

Characteristics and evaluation of matrix fertilities of the waste lands after construction of Ha-Tong expressway

By measuring and analyzing the physical and chemical properties of the wastelands along the both sides of Ha-Tong expressway, in the study the lands were divided into 7 types, i. e. land for materials of sands and stones ( LSS) , land of rock slope ( LRS) , land of decayed rocks ( LDR) , quicksand slope land ( LQS) , waste land of quarry ( LWQ) , waste hill land ( LWH) and loamy slope land ( LLS) and comprehensive fertilities for each type of matrices were also evaluated. The result showed that LSS, LRS, LDR and LWQ were compact sandy soil with more gravel and less moisture, while LQS, LWH and LLS were loamy soil with less gravel and higher soil moisture. Except for LLS, the other matrices were lack or seriously lack of organic matter, total N, available N and available P, but rich of available K. Fertilities of matrices in proper order were:LLS>LQS>LWH>LDR>LSS>LRS>LWQ. The content of organic matter, content of total N and natural moisture content were the main factors affecting the fertility of different lands.