摘要
为明确影响切花菊生长及切花品质的关键土壤因子,本研究采集10个产地的土壤进行切花菊栽培试验,通过测定土壤17项指标及切花菊根系和地上部生长指标,采用相关性分析、通径分析和多元线性回归分析探讨土壤因子对切花菊生长的影响。结果表明,各产地土壤的土壤容重、田间持水量和pH值均在合理范围内,少量土样的阳离子交换量低于正常值,土壤电导率(EC值)较高,多数土壤的有效磷、有效铜、有效锌、有效铁含量均处于缺乏水平,但在这些土样中生长的切花菊并未受到显著抑制。与切花菊根系及地上部指标有显著相关性的土壤因子,按照绝对值从大到小的排序为:阳离子交换量>脲酶活性>有效钾含量>有效锰含量>田间持水量>EC值。通径分析表明,对切花菊生长有较强直接效应的土壤因子按通径系数的绝对值大小排序依次为阳离子交换量、pH值、EC值、脲酶活性和田间持水量。在建立的线性回归模型中,以下3种模型的拟合效果较好:以脲酶活性为构成变量之一的拟合4项根系指标的模型,以阳离子交换量为构成变量之一的拟合株高、总根长的模型,以过氧化氢酶活性为构成变量之一的拟合3项根系指标的模型。综合全文分析结果,在涉及土壤的17项指标中,相对于有效磷、铁、锌、铜等元素的缺乏,在土壤治理中维持阳离子交换量、脲酶活性、pH和EC值、田间持水量等指标的正常范围,对切花菊的正常生长更为重要。本研究结果为切花菊栽培土壤治理提供了关键信息。
In order to identify the key effect factors of different soil physical and chemical properties on the growth of cut chrysanthemum,this study collected soils from 10 different production regions for cut chrysanthemum cultivation experiments.By measuring17 indicators of soil physical and chemical properties and indicators of the root and shoot of cut chrysanthemum,the influence of soil factors on growth was investigated using correlation analysis,path analysis,and multiple linear regression analysis.The results showed that the soil bulk density,field water capacity,and the pH values of collected soil samples were within within reasonable ranges,the cation exchange capacity(CEC)in a few samples was lower while soil electrical conductivity(EC)was higher than the normal.The contents of available phosphorus,copper,zinc,and iron of most soils were deficient,but the growth of cut chrysanthemum cultivated in these soil were not inhibited.Soil factors that show significant correlated with cut chrysanthemum root and shoot indicators were ranked by absolute correlation coefficients,which were as follows:CEC>urease activity>available potassium content>available manganese content>field water capacity>EC value.Path analysis indicated that the CEC,pH,EC value,urease activity,and the field water capacity showed strong correlation with the growth index of cut chrysanthemum.Among the established linear regression models,the following three types demonstrated good fit:a model fitting four root system indicators with urease activity as a variable;a model fitting plant height and total root length with CEC as a variable;a model fitting three root system indicators with catalase activity as a variable.Comprehensive analysis revealed that the indicators of CEC,urease activity,pH,EC value,and the field water capacity were more critical for cut chrysanthemum growth than deficiencies in elements such as available phosphorus,iron,zinc,and copper.This study provides essential insights for soil management in cut chrysanthemum cultivation.
作者
陈佳颖
于礼臻
赵爽
房伟民
陈发棣
刘敏荣
薛建平
管志勇
CHEN Jiaying;YU Lizhen;ZHAO Shuang;FANG Weimin;CHEN Fadi;LIU Minrong;XUE Jianping;GUAN Zhiyong(College of Horticulture,Nanjing Agricultural University/State Key Laboratory of Crop Genetics and Germplasm Enhancement/Key Laboratory of Landscaping,Ministry of Agriculture and Rural Affairs,Nanjing,Jiangsu 210095;Kaiyuan Tianhua Biological Industry Co.,Ltd.,Kaiyuan,Yunnan 661600)
出处
《核农学报》
北大核心
2025年第10期2277-2289,共13页
Journal of Nuclear Agricultural Sciences
基金
国家重点研发计划项目(2023YFD2300900)
中央高校基本业务费(KYT2023006)。
关键词
土壤因子
切花菊
根系
通径分析
多元回归分析
soil factors
cut chrysanthemum
root
path analysis
multiple regression analysis
