摘要
运用Excel以及ArcG IS中的地统计模块的数据统计分析功能,对江西省奉新县第二次土壤普查中的养分数据以及2006年耕地地力评价中采集的养分数据进行统计特征分析以及级别面积统计分析,找出该县水田土壤养分的变异规律。结果表明:该县有机质和全氮基本持平,变化不大处于丰富水平,其中平均值变化处于0.06个单位以内;碱解氮、有效磷、速效钾有了极大提高,其均值提高幅度分别达到45.28、11.19、37.53个单位,基本扭转了该县少磷缺钾的局面,但是还有相当一部分的水田处于缺钾状态,导致不能满足作物的需求,缺钾水田占全县水田面积的19.52%,;土壤酸化趋势明显,酸碱度均值下降了1.08个单位,已成为制约奉新县耕地质量的一个重要因素。
Based on the analysis on the nutrient data from the second soil survey in Fengxin County and those from the evaluation of arable soil nutrients in 2006 and the statistical analysis of area levels by Excel and ArcGIS statistical modules, the variation of soil nutrients in paddy fields in Fengxin County was analyzed. The results show that the organic matter and total nitrogen have no significang changes and keep a rich level , the change in the average is less than 0.06 units ; nitrogen, available phosphorus, potassium have been greatly improved, the average increases are 45.28,11.19 and 37.53 units respectively, the situation of phosphorus and potassium deficiency has been basicly reversed, but there is still a significant portion of paddy fields in potassium deficiency, unable to meet the needs of crops; the potassium - deficient paddy fields occupy 19.52% total aea of the paddy fields of the whole county ; the soil acidification trend is abvious , the pH average value was dropped by 1.08 units, which has become an important retrictive factor in Fengxin County＇ s farmland quality.
出处
《江西农业大学学报》
CAS
CSCD
北大核心
2009年第5期919-926,共8页
Acta Agriculturae Universitatis Jiangxiensis
基金
国家自然科学基金项目(30760048)
中科院知识创新重大项目(KSCX1-YW-09-08)
关键词
水田
土壤养分
养分变异
耕地质量
paddy field
soil nutrient
nutrient variability
farmland quality
