煤矿复垦地不同覆土厚度对小麦产量影响研究——以淮南煤矸石充填耕地复垦地为例

STUDY ON THE EFFECT OF COVERING SOIL THICKNESS ON WHEAT YIELD IN COAL MINE RECLAIMED LAND——A CASE OF COAL GANGUE BACKFILLED RECLAMATION CULTIVATED LAND IN HUAINAN CITY

在淮南新庄孜煤矸石充填耕地复垦地中以覆土厚度水平作为控制因素研究其对小麦产量的影响及其相关性。在一定覆土厚度范围内,不同覆土厚度对小麦产量产生了显著性影响;小麦产量与覆土厚度有高度的线性正相关。其主要原因是底层充填煤矸石颗粒粗糙、坚硬,没有粘性呈分散状,机械阻力大,保水保肥能力弱;覆土厚度薄的地块与厚度厚的地块相比能储存持有的养分水分少进而影响其养分水分的提供。

With covering soil thickness as control factor to study the effect of it on wheat yield and the correlation between them in coal gangue backfilled reclamation land Huainan Xinzhuangzi. Within a certain range of covering soil thickness, different level of covering soil thickness had a significant impact on wheat yield and they showed a highly positive linear correlation. The main reasons were these： underlying filling coal gangue granules were rough,no-sticky, scattered, with large mechanical resistance and weak capacity of holding water and fertilizer. Compared to the plot with thick covering soil, thin covering soil could keep less nutrients and water, thereby influencing the provision of nutrients and water.