基于KPCA降维的综合评价法筛选最优温室白萝卜水溶肥施用量  

Selecting optimal application rate of water-soluble fertilizer for greenhouse white radish based on the comprehensive evaluation method of KPCA dimensionality reduction

作　　者：魏煜嵘 马英杰[1] 艾鹏睿 WEI Yurong;MA Yingjie;AI Pengrui(College of Water Conservancy and Civil Engineering,Xinjiang Agricultural University/Xinjiang Key Laboratory of Water Conservancy Engineering Safety and Water Disaster Prevention,Urumqi 830052,Xinjiang,China)

机构地区：[1]新疆农业大学水利与土木工程学院·新疆水利工程安全与水灾害防治重点实验室,乌鲁木齐830052

出　　处：《中国瓜菜》2025年第2期107-114,共8页China Cucurbits And Vegetables

基　　金：国家自然科学基金(2021YFD1900804);生物有机肥及大量元素水溶肥增产提质效果试验项目(HRSY-JY-2023-007)。

摘　　要：为深入研究乌鲁木齐地区温室白萝卜的最佳水溶性肥料施用方案,设置了4个不同浓度梯度的水溶性肥料处理组,构建基于核主成分分析(KPCA)降维技术的隶属函数综合评价体系,旨在评估水溶性肥料对温室萝卜生长、产量及果实品质等多方面指标的影响。研究结果显示,高浓度的氮、磷、钾水溶性肥料有助于提升产量;而低浓度的水溶性肥料则有利于提升维生素C和可溶性糖含量;中等浓度的水溶性肥料则对提高单株单果质量有积极作用。此外,水溶性肥料浓度与干物质质量、株高与可溶性糖含量、叶片数与叶长、667 m^(2)产量与收益比等指标间存在显著的正相关关系,而株高与单果质量、维生素C含量与SPAD值、单果质量与可溶性糖含量之间则表现出显著的负相关性。这些结果揭示了白萝卜的农艺性状与品质之间存在一定的相关性和相互制约关系。为了全面评估不同浓度水溶性肥料对温室萝卜生长、产量及品质的影响,采用基于KPCA降维技术的多指标综合评价体系,提取了3个主成分F1、F2、F3;通过隶属函数对这3个主成分进行了综合评价,并分析了12个指标间的相关性以及地上部分干物质的积累规律,以增产提质为目标,筛选出最优的水肥处理方案为M2处理(高磷型105 kg·hm^(-2)、生根型785 kg·hm^(-2)、农用微生物菌剂75 kg·hm^(-2)、根茎专用型105 kg·hm^(-2))。In order to thoroughly investigate the optimal application scheme of water-soluble fertilizer for greenhouse white radish in Urumqi,four treatments with different concentration gradients of water-soluble fertilizer were set up to explore the effects of water-soluble fertilizer on the growth,yield and fruit quality of greenhouse radish.A comprehensive evaluation system of membership function based on kernel principal component analysis(KPCA)dimensionality reduction was constructed.The results showed that high concentrations of nitrogen-phosphorus-potassium water-soluble fertilizer were beneficial for increasing yield.Low levels of water-soluble fertilizer were beneficial for increasing the content of vitamin C and soluble sugar.Medium-level water-soluble fertilizer promoted fruit mass per plant.Furthermore,there was a significant positive correlation between the concentration of water-soluble fertilizer and dry matter mass,plant height and soluble sugar content,leaf number and length,as well as yield and benefit ratio per 667 m^(2).In contrast,significant negative correlations were found beteen plant height and fruit mass,vitamin C content and SPAD value,as well as fruit mass and soluble sugar content.These results revealed certain correlations and mutual constraints between agronomic traits and quality of white radish.A multi-index comprehensive evaluation system based on KPCA dimensionality reduc-tion technology was used to process 12 evaluation indexes,and three principal components were obtained.These three principal components were comprehensively evaluated using the membership function,and the correlations of 12 indexes as well as the accumulation pattern of above-ground dry matter were analyzed.Aiming to increase yield and improve qual-ity,the optimal water and fertilizer treatment scheme was identified as M2 treatment(High phosphorus type 105 kg·hm^(-2),Rooting type 785 kg·hm^(-2),Agricultural microbial agents 75 kg·hm^(-2),Rhizome-specific type 105 kg·hm^(-2)).

关 键 词：温室白萝卜 土壤氮磷钾 KPCA降维 隶属函数评价 

分 类 号：S631.1[农业科学—蔬菜学]