论文部分内容阅读
结合国家测土配方施肥项目的进行,根据吉林省16县市土壤采样点的实测数据,分析了土壤有机质,碱解氮,速效磷,速效钾的分布特征。结果表明:土壤有机质含量表现出东高西低的分布趋势;碱解氮的分布趋势同有机质;速效磷含量总体处于中等偏高水平,但分布差异较大,全省范围内速效磷含量东部>中部>西部;速效钾含量分布与速效磷相反,西部大于中东部地区。根据东中西部不同的养分分布特点、气候特点及玉米的需肥规律,相应的氮磷钾肥配比为:东部2.5∶1∶1.5,中部3∶1∶1.5,西部2～3∶1∶1。
Combined with the national soil testing and fertilizer project, the distribution characteristics of soil organic matter, available nitrogen, available phosphorus and available potassium were analyzed based on the data from 16 soil sampling sites in Jilin Province. The results showed that the content of organic matter in the soil showed a trend of high in the east and low in the west. The distribution of available nitrogen was the same as that in the organic matter and the content of available phosphorus was moderately high but the distribution was quite different. Central> Western; Available potassium content distribution is opposite to that of available phosphorus, and the western part is larger than the middle part of the eastern part. According to different nutrient distribution characteristics, climatic characteristics and maize fertilization rule in the eastern, central and western regions, the corresponding N, P and K fertilizer ratios are: 2.5: 1: 1.5 in the east, 3: 1: 1.5 in the middle, 2: .