生产建设项目弃土场培肥试验研究

Study on the Fertility Betterment of Spoil Ground in Production and Construction Projects

生产建设项目建设过程中会产生大量的弃土,弃土养分极度缺乏、结构紊乱。为了给黄土高原沟壑区弃土场培肥提供一定的技术依据,试验在黄土高原陕西省长武农业生态试验站模拟弃土场进行。试验选取白三叶、草木樨、紫穗槐、柠条、黑麦草5种植物,探究在不同施肥处理下各植物小区0~10 cm、10~20 cm土层的养分含量。设施有机肥(羊粪),施肥量为30000 kg/hm2;施秸秆,施肥量为9000 kg/hm2,以及不施肥三种施肥处理,探寻植物在单播、混播模式下对弃土场的土壤培肥效果。黑麦草+白三叶在三种处理下的土壤肥力均较高,培肥效果较好。

During the construction of production and construction projects,a large amount of abandoned soil will be produced,which is of deficient nutrients and the disordered structure. In order to provide a certain technical basis for the fertility betterment of the spoil ground in the gully region of the Loess Plateau,the experiment was carried out in the simulated spoil ground in the Changwu Agricultural Ecological Experimental Station in Shaanxi Province. Five kinds of plants,Trrifolium repens L,Melilotus suaveolens Ledeb,Amorpha fruticosa Linn,Caragana korshinskii and Lolium perenne L,were selected to explore the nutrient content of 0-10 cm and 10-20 cm soil layers in different plant communities under three different fertilization treatments,which were organic fertilizer( sheep manure,30000 kg/hm^2),straw( sheep manure,9000 kg/hm^2) and no fertilization. The effect of plants on soil fertility betterment of spoil ground under the mode of single seeding and mixed seeding were studied. The fertility betterment effect of Lolium perenne L and Trrifolium repens L was the best according to the experiment.