桂林市水稻土养分状况研究

1998年秋收后 ,我们对全市稻田进行了取样化验 ,共采集土壤农化样 35 36个 ,经化验与第二次土壤普查的养分状况相比较 ,结果表明 :土壤有机质、全氮呈上升趋势 ,土壤速效磷无明显变化、速效钾略有下降 ;p H值呈下降趋势。本文对这些化验结果进行了比较分析 ,为今后桂林市稻田培肥地力和合理施肥提供了科学依据。

Study on the Nutrient Status of Paddy Soil in Guilin City

For the purpose of understanding the present nutrient conditions of the paddy soil in Guilin City os that the scientific basis could be provided to the fertilizer application after soil diagnosis ,the author carried out soil sample analysis for all paddy fields in Guilin City after the Autumn harvest in 1998.The total number of soil agrochemical samples was 3536.After analysis and comparing with the nutrient conditions in the second general survey of soil,the result showed that:Soil organic matter and soil total nitrogen tended to increase;soil rapidly available phosphorus did not change obviously,rapidly available potassium decreased a little bit;soil pHvalue tended to decrease.Inthis article ,the above mentioned results had been compared,analysed and studied in order to provide the scientific basis for soil fertility culture and reasonable fertilizer application.