延吉市农田土壤肥力综合评价

目的]研究延吉市农田土壤肥力状况,为延吉市农田土壤的合理施肥提供参考依据。方法]采集82个农田土壤样品,其中玉米农田57个,水稻农田25个,对其进行土壤肥力相关的化学分析,然后采用主成分分析法对该区域的农田土壤肥力进行分级研究,并给予综合评价。结果]延吉市农田土壤肥力指标可归为4个主要成分的82个评价因子,通过聚类分析方法计算得到玉米样点IFI值的得分在-1.643 21.732 0,水稻样点IFI值的得分在-1.673 11.712 9。结论]该方法可从一定程度上反映田区土壤的肥力标准概况以及能对土壤养分供应能力及丰缺度作出相对正确的评价。

Comprehensive Evaluation of Farmland Soil Fertility in Yanji City

Objective] Farmland soil fertility was studied to provide references for rational fertilization of farmland soil in Yanji City. Methods] Collected 82 soils, including 57 corn farmland, 25 rice farmland, chemical analysis related to soil fertility was carried out,and then principal component analysis method was adopted to study classification of soil fertility and gave comprehensive evaluation in the region. Result] The soil fertility index of farmland in Yanji City can be classified into 82 major components of the 4 evaluation factors, the corn samples values of IFI score was in the range of -1. 6432-1. 7320 by cluster analysis method, the rice sample value of IFI score was in the range of -1. 6731-1. 7129. Conclusion] This research can reflect the soil fertility standard of soil in a certain extent and can make a relatively correct evaluation of soil nu-trient supply capacity and abundance.