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潜育性水稻田是我国南方面积较大的低产田之一。我省红壤丘陵地区,主要是红壤母质上发育的青夹泥,由于土质粘重,排水不良,地下水位高,土壤长期渍水,水冷泥温低,青泥层厚,通气性能差。虽可积累土壤有机质,全氮含量较高,但有效养分释放慢,磷钾养分易溶解、淋失,土壤供肥水平低。加之还原毒害物质多,对水稻吸收养分和生长发育障碍极大,常年水稻亩产只有三、四百斤。
Drought paddy fields are one of the larger low-yielding fields in southern China. In the hilly red soil region of our province, mainly the green clay developed on the parent material of red soil is poor in aeration performance due to sticky soil, poor drainage, high groundwater level, long-term soil waterlogging, low temperature of water-cooled mud and thick green mud layer. Although accumulation of soil organic matter, total nitrogen content is higher, but the effective release of nutrients is slow, phosphorus and potassium nutrients easily dissolved, leaching loss, soil fertility level is low. Coupled with the reduction of poisonous substances, rice absorption of nutrients and great obstacles to growth and development, perennial rice yield only three or four pounds.