CAJ | 학술논문

2007年采集了崇明三岛(崇明岛、长兴岛和横沙岛)土壤表层(0～20 cm)土样135个,测试和分析了其中有机质、全氮、有效磷和有效钾的含量.在ArcGIS 9.1平台上,运用地统计学和叠置分析等方法,研究了土壤主要养分空间分布特征.结果表明,崇明土壤全氮和有机质含量总体上呈条带状或斑块状分布,以城桥镇和堡镇为两个高值中心,分别向西北和东北逐渐递减.有效磷和有效钾含量分别呈现斑块状和条带状分布,且二者的分布基本呈互补趋势(有效磷含量高的地方一般有效钾含量很低).与1980年数据相对比,土壤有机质和全氮含量在20多年来没有明显变化,而有效磷含量明显升高,有效钾含量有所降低.这表明崇明三岛存在一定程度的施肥结构不合理的问题.
2007년채집료숭명삼도(숭명도、장흥도화횡사도)토양표층(0～20 cm)토양135개,측시화분석료기중유궤질、전담、유효린화유효갑적함량.재ArcGIS 9.1평태상,운용지통계학화첩치분석등방법,연구료토양주요양분공간분포특정.결과표명,숭명토양전담화유궤질함량총체상정조대상혹반괴상분포,이성교진화보진위량개고치중심,분별향서북화동북축점체감.유효린화유효갑함량분별정현반괴상화조대상분포,차이자적분포기본정호보추세(유효린함량고적지방일반유효갑함량흔저).여1980년수거상대비,토양유궤질화전담함량재20다년래몰유명현변화,이유효린함량명현승고,유효갑함량유소강저.저표명숭명삼도존재일정정도적시비결구불합리적문제.
According to the data of organic matter (OM), total nitrogen (TN), available phos-phrus (AP) and available potassium (AK) of topsoil samples (0～20 cm) collected from 135 sites in 2007, the spatial distribution characteristics of the main soil nutrients in three islands in Chongming,Chongming island, Changxing island and Hengsha island, were analyzed using the methods of geostatistics and overlay analysis in the software of ArcGIS 9. 1. The results showed that the areas with higher OM and TN were mainly distributed in Chengqiao town and Bao town, and the values of both indices declined gradually towards northwest and northeast. The distribution trends of AP and AK were basically complementary. When comparing the values of 1980 and 2007 in terms of all these indexes, OM and TN did not change significantly, whereas AP increased rapidly and AK decreased. The results further revealed the unbalance in soil fertilization.