Effect of Land Reclamation on Nutrient Distribution in Reclaimed Farmlands Overlying Xuzhou Underground Coal Mines *1

This research was carried out to evaluate the effect of the reclamation procedure with respect to soil fertility and nutrient distribution pattern in the reprecipitated reclaimed soil. Although there was an obvious indication of low levels of essential nutrients in the reclaimed farmlands (organic matter=0.32 g kg -1 ,total N=380.8 mg kg -1 , available P=4.7 mg kg -1 ), compared to the undisturbed farmlands (organic matter=2.5 g kg -1 , total N=1 220 g kg -1 , available P=20.8 mg kg -1 ), the uneven pattern of nutrient distribution was also shown to have been the major limitation to successful reclamation. Further improvement can be achieved through the integration of intensive eco farming systems using proper fertilizer field correction (PFFC) and organic manure for successful reestablishment and management of newly reclaimed farmlands overlying the Xuzhou coal mine subsidence.

泥浆泵复垦土壤生产力的评价及其土壤重构

通过对泥浆泵复垦土壤理化特性的测试分析、土壤生产力的定量评价 ,揭示了泥浆泵复垦土壤生产力低下的主要原因 ,并有针对性地提出了泥浆泵复垦土壤重构的主要措施。

煤矿沉陷区泥浆泵复田技术研究

用泥浆泵挖深垫浅的复田方法已在我国煤矿沉陷区治理中得到应用，但迄今为止尚未对这一技术进行深入研究。本文深入讨论了泥浆泵复田的基本原理，总结了目前使用泥浆泵复田的工艺流程，评价了复田后的土壤生产能力，从而对现行的泥浆泵复田技术进行了全面评价，并据此提出了泥浆泵复田的完整技术模式。