基于主成分分析的生活再生水滴灌对苹果影响的综合评价

为了探究生活再生水滴灌灌溉定额与施肥量对苹果生长、光合、产量和品质的影响.采用3因素(水质Q、灌溉定额W、施肥量F)3水平(低、中、高)正交试验,利用极差分析、方差分析和主成分分析,得出了生活再生水滴灌对苹果各指标的主次顺序、显著性、最优组合方案以及各指标综合得分最高方案.结果表明,3因素对苹果新梢长度、茎粗、Pn、产...

Comprehensive Evaluation of the Effect of Drip Irrigation with Domestic Reclaimed Water on Apple Based on Principal Component Analysis

In order to explore the effects of drip irrigation quota and fertilizer amount on apple growth,photosynthesis,yield and quality,three factors(water quality Q,irrigation quota W,fertilizer amount F)three levels(low,medium and high)orthogonal test,range analysis,variance analysis and principal component analysis were used.The primary and secondary order,significance,optimal combination scheme and the scheme with the highest comprehensive score of each index of domestic reclaimed water drip irrigation on apple were obtained.The results showed that the primary and secondary order of the effects of the three factors on apple shoot length,stem diameter,Pn and yield was W>F>Q,the effects of irrigation quota W and fertilizer amount F on the above indexes were significant,and the above indexes increased with the increase of irrigation quota and fertilizer amount;The primary and secondary order of the effects of the three factors on apple soluble solids were F>Q>W,and the effects were significant,and soluble solids first increased and then decreased with the increase of irrigation quota and fertilization;The primary and secondary order of the effects of the three factors on apple total sugar and vitamin C were F>W>Q,and the effects of irrigation quota and fertilization were significant.Principal component analysis results showed that the cumulative variance contribution rate of the first three principal components was 95.333%.According to the comprehensive score ranking,T3 treatment was a better combination scheme for drip irrigation of apples with domestic reclaimed water.That is,under the condition of gravel soil and 180.4 mm rainfall during the growth period,for the 4-year-old dense planting of Liquan Duanfu apple with dwarf rootstock,the irrigation quota of 6480 m³/hm² and the fertilization amount of 317 kg/hm² is better for domestic reclaimed water drip irrigation.The study lays a theoretical foundation for the water and fertilizer management scheme of apple production with domestic reclaimed water drip irrigation in Ningxia and realizes the high-quality and efficient production of apple.