钟山县主要稻田土壤22年监测结果研究

为研究土壤肥力变化状况及施肥对土壤养分含量和作物产量的影响,在钟山县选择4个主要水稻土进行连续22年监测,结果表明:施肥水平影响土壤养分含量的变化,潴育黄泥田和石灰性田因施肥水平较高,土壤各种养分含量呈逐年上升趋势;潴育沙泥田和潴育杂沙田因有机肥及钾肥施用量过少,造成土壤有机质及钾素养分含量逐年下降。

Changes of nutrient contents in main paddy field soils in Zhongshan County with 22 years monitoring

To study the changes of the nutrient contents in the soils of Zhongshan County and the effects of fertilizer application on the soil nutrient contents and the yield of crops,four types of soil were seleted to conduct a location-fixed trial for 22 years.The results showed that the level of fertilization affects the change of soil nutrient content.In periodical water-logging yellow mud type and lime type fields,due to higher levels of fertilization,soil nutrient content showed an upward trend.Because application rate of organic and potassium fertilizers is too small,soil organic matter and potassium content in periodical water-logging sand type and mixed sand type fields were decreased year after year.