The invention relates to the technical field of fruit and vegetable cultivation, and provides a water chestnut fertilization
influence analysis method based on
principal component analysis, which comprises the following steps: setting a plurality of field trials for different
nitrogen,
phosphorus and
potassium fertilization level treatment; measuring
plant growth indexes, yield indexes,
corm quality indexes and soil physicochemical property indexes of the
treated water chestnuts; performing
principal component analysis on the measured multiple indexes, and extracting principal components of which the characteristic values are greater than 1; calculating comprehensive scores of the
processing according to the scores of the principal components and sorting the comprehensive scores; according to the comprehensive
score, evaluating the comprehensive influence of different fertilization treatments on the growth, yield, quality and
soil properties of the
water chestnuts, and screening out an optimal fertilization combination. According to the method, the matching of medium-
low nitrogen and
phosphorus and medium-high
potassium is clear, so that high yield and high quality are guaranteed,
soil acidification can be effectively relieved, excessive consumption of nutrients is avoided, synergism of
fertilizer saving, efficiency improvement,
soil health and quality improvement is realized, and data support and quantitative decision basis are provided for scientific fertilization of the
water chestnuts.