山西农业大学学报（自然科学版）2019，Vol.39Issue(2)：46-54,9.DOI:10.13842/j.cnki.issn1671-8151.201810040
根区不同位置补气对番茄根际环境及其生长的影响
Characteristics of root distribution and water-transportation tissues of apple rootstocks Malusmicroma-luand M9T337
摘要
Abstract
[Objective]In order to explore physiological mechanisms and drought tolerance of apple rootstock vigorous/dwarfing ,the structure and water-transport ability of root system at various soil depth of two common apple root-stock species were investigated,and research was aimed to provide technical support for fruit production management. [Methods]Vigorous rootstock Malusmicromaluand dwarfing rootstock M9T33 7 were used as experimental materials. The growth condition,root distribution,and xylem vessel trait of both branch and root system at different soil depth were measured.Hydraulic conductivity of root and branch was determined based on the xylem vessel traits.[Results] Study results indicated that the major parameters including plant height,basal diameter,and the number and length of branch of M.micromaluwere significantly higher than that of M9T3 3 7,and both root biomass and root length density of M.micromaluwith a vertical distribution of 0~60 cm were significantly greater than that of M9T33 7 with vertical distribution of 0~40 cm.Vessel diameter and hydraulic conductivity of both root and branch of M.micromalu were sig-nificantly higher than that of M9T3 3 7 ,while vessel density of root and branch was significantly lower in M9T3 3 7,and vessel diameter and hydraulic conductivity of deep roots were greater than that of shallow roots for both species.[Con-clusion]M.micromalu possessed more efficient vessels,higher root length density and wider vertical root distribution, which greatly contributed to its vigorous effect and strong drought resistance.The deep root,conducting water absorb-ing from deep soil,may act as an important factor for improving tree′s drought resistance.关键词
根际通气/土壤氧气体积分数/二氧化碳体积分数/土壤酶活性/番茄/产量Key words
Rhizosphere aeration/Soil oxygen content/Carbon dioxide volume fraction/Soil enzyme activity/Tomato /Yield分类
农业科技引用本文复制引用
白佳艺,温祥珍,李亚灵,崔健,任宇..根区不同位置补气对番茄根际环境及其生长的影响[J].山西农业大学学报（自然科学版）,2019,39(2):46-54,9.基金项目
陕西省科技统筹创新工程计划项目(2016KTCQ02-09) （2016KTCQ02-09）
国家现代苹果产业技术体系(CARS-28) （CARS-28）
庆阳市科技重大专项(ZX2014-01-2,ZX2014-01-4) （ZX2014-01-2,ZX2014-01-4）
