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我市2008年实施国家级测土配方施肥项目,对全市稻田土壤取样4000个进行养分检测,根据本项目的检测结果,和一九八零年建阳第二次土壤普查原点的养分检测结果进行对比分析,初步看出我市二十多年来的稻田土壤养分变化趋势。一、从检测结果的对比看出,我市二十多年来稻田土壤养分总的趋势是1.土壤钾素有下降的趋势我市耕地土壤速效钾含量据第二次土普结果含量丰富大于100mg/kg的有170000多亩,占耕地面积的40%;一般
In 2008, the city implemented a national soil testing and fertilizer program to test 4,000 soil samples collected from paddy fields in the city. According to the test results of the project and the nutrient detection results of the origin of the second soil survey in 1980 in Jianyang City Comparative analysis shows that the change of soil nutrients in paddy field in our city for more than twenty years. First, from the comparison of test results, the general trend of paddy soil nutrients in our city over the past 20 years is 1. The tendency of soil potassium decline The available potassium content of cultivated soils in our city is greater than the second result 100mg / kg has 170000 acres, accounting for 40% of arable land; generally