华北农学报Issue(6)：104-110,7.
基质理化性状与番茄壮苗指标的通径分析
Path Analysis of Substrate Physicochemical Properties and Tomato Plug-seedlings Index
摘要
Abstract
In this paper ,taking peat ,perlite and vermiculite as the basic experimental material ,established dif-ferent physicochemical properties of compound substrate through the way of different proportion of basic materials . Applied regression analysis and path analysis to study the indicator of substrate physicochemical properties on toma -to plug-seedlings,in order to achieve the standardization of substrate physicochemical properties and screen sub -strate formula of tomato seedlings production .The result indicated that ,peat∶perlite∶vermiculite=6∶4∶1 ( V/V) was best for tomato plug seedlings ( Physicochemical properties as follows:Bulk density was 0.113 g/cm3 ,total porosity was 64.65%,air-filled porosity was 40.22%,container capacity was 24.44%,pH-value was 6.19,EC-value was 0.76 mS/cm,available nitrogen content was 386.9 mg/kg,available phosphorus content was 211.5 mg/kg,availa-ble potassium content was 826.5 mg/kg).Through the comparison of seedling morphological index and quality in-dex ,we found that tomato seedling cultivated with peat∶perlite∶vermiculite=6∶4∶1 was significant higher than oth-er substrate formula on stem diameter and strong plug-seedlings index ( G-Value,root-shoot ratio ,sound seedlings in-dex ) .Regression and path analysis showed that direct path coefficient ,positive and negative effects were different a-mong substrate physicochemical properties and tomato strong plug-seedlings index .Bulk density was the main physi-cal properties that influenced tomato strong plug-seedlings index in the production of tomato seedling .When the sub-strate physical property was in the optimum range .pH-value,available nitrogen,available phosphorus and available potassium content were the main factors which effect tomato strong plug-seedlings index .In order to got the best composite substrate formulation and cultivated strong and high-yield tomato seedlings , in the preparation of sub-strate ,bulk density was the first consideration ,within a suitable range ,then adjusted pH value and available nutrient content for the requirements of tomato plug-seedlings .关键词
番茄/壮苗指标/复合基质/理化性状/多元回归/通径分析Key words
Tomato/Strong plug-seedlings index/Compound substrate/Physicochemical properties/Multiple re-gression/Path analysis分类
农业科技引用本文复制引用
杨延杰,赵康,林多,陈宁..基质理化性状与番茄壮苗指标的通径分析[J].华北农学报,2013,(6):104-110,7.基金项目
“十二五”农村领域国家科技计划项目（2011BAD12B03-05）；山东省现代农业产业技术体系蔬菜创新团队建设栽培与土壤肥料岗位专家资助项目；山东省农业重大应用技术创新项目 （）
