矿物肥料对排土场土壤物理性质的改良效应

Ameliorative effect of mineral fertilizers on soil physical properties of dump

以阜新露天矿东排土场复垦玉米地为研究对象,分析了矿物肥料对露天矿排土场土壤物理性质的改良效应。结果表明,不同处理下土壤的砾石含量略有降低,砂粒含量以草炭含量最高,依次为沸石、粉煤灰和对照;土壤自然含水量、田间持水量、凋萎系数和有效含水量均以草炭处理最大,排序依次为沸石、粉煤灰和对照;不同施肥处理下的土壤含水率在玉米整个生长周期内均呈"M"型的变化趋势;容重大小排序为草炭<沸石<粉煤灰<对照,总孔隙度和毛管孔隙度大小排序为草炭>沸石>粉煤灰>对照非毛管孔隙度则反映为粉煤灰最大,草炭最小;对照、草炭、沸石和粉煤灰的蓄水容量分别为1 126 t/hm2、1 366 t/hm2、1 270t/hm2和1224 t/hm2,有效蓄容分别为246 t/hm2、236 t/hm2、250 t/hm2和270 t/hm2,毛管持水量分别为880 t/hm2、1 130 t/hm2、1 020 t/hm2和954 t/hm2。

In this paper, open-pit mine in Fuxin East Dump reclamation for the study of corn, an analysis of mineral fertilizers on the open-pit mine dump soil physical properties improved effect. The results show that the different treatment of the gravel content of the soil under the slightly lower content of sand to peat content in the highest, followed by zeolite, fly ash and control; soil natural water content, field capacity, wilting coefficient and the effective water content are peat deal with the most, followed by sequencing zeolite, fly ash and control; Under different fertilization in maize soil moisture throughout the growing cycle Juncheng ＂M＂-shaped trend; Sort for size bulk peat 〈Zeolite 〈fly ash 〈control, total porosity and capillary porosity for the size sort peat〉 zeolite〉 Fly〉 control of non-capillary porosity of fly ash is reflected in the largest and the smallest peat; control, peat, zeolite and fly ash to the water storage capacity of 1126 t/hm2, 1366 t/hm2, 1270 t/hm2 and 1224 t/hm2, the effective storage capacity, respectively 246 t/hm2, 236 t/hrn2, 250 t/hrn2 and 270 t/hm2, capillary water holding capacity, respectively 880t/hm2, 1130 t/hm2, 1020 t/hrn2 and 954 t/hm2.