摘要
【目的】探讨玻璃、杨木、砖面3种界面影响苹果根系构型和深层土壤理化性质的规律。【方法】以两年生苹果幼树(红富士/平邑甜茶)为试材,采用盆栽方式,研究玻璃、杨木和砖3种介质界面对苹果根系及土壤理化性质的影响。【结果】在根系长度、表面积和体积上,砖面最大,木面次之,根重和平均直径上木面最大,砖面次之,所有指标玻璃面均表现最差;不同界面表现出不同的根系集中分布层,砖面和木面的根系集中分布层在第二层(10—20 cm),玻璃面在第四层(30—40 cm);根系活力的高低与根系呼吸没有表现出正相关关系,是受到生长根和吸收根的比例影响;砖面界面对于不同层面土壤的温度具有稳定性,玻璃界面有利于水分的下渗,木面界面对盐分有较强的吸附作用。【结论】木面和砖面具有明显改善苹果根系构型和土壤理化性质的作用,但改善方式略有差异,砖面主要促进根系加长和数目的增多,木面则有明显促进根系次生结构发育的作用,同时界面调节改变了苹果根系集中分布层的位置。
[ Objective ] The study was to explore apple seedlings root characteristics, physical and chemical properties of the deep soil in three different soil interfaces. [Method] This study was conducted with biennial Fuji apple young seedlings in a pot culture experiment, to analyze different effects of glass interface, wood interface and brick interface. [Result] Three interfaces influenced extremely significant difference on the root system, including the root system length, surface area and volume. Brick was the highest in the above indexes, while wood took the second place. Wood was the largest and was the brick second on root weight and average diameter. Glass was the worst on all the indexes. Different interfaces showed different root concentration distribution layers, brick and wood on the second layer （10-20 cm）, while glass centralized on the fourth layer （30-40 cm）. The discretion of the root activities to root respiration did not show a positive correlation because of the ratio of the absorbed roots to the growth roots. Brick interface had stability on temperature in different layers, glass was in favour of water infiltration, and wood had a strong adsorption effect on salt. [ Conclusion ] Wood and brick interfaces obviously improved the apple root characteristics and the physical and chemical properties of the deep soil, with few different ways. Brick promoted the root length and increased the root number, and wood obviously promoted the secondary structure of root development role. Interface regulation altered the apple root concentration distribution layer.
出处
《中国农业科学》
CAS
CSCD
北大核心
2012年第17期3639-3645,共7页
Scientia Agricultura Sinica
基金
国家现代农业产业技术体系建设专项(CARS-28)
山东省科技发展计划项目(2011GNC11109)
山东省良种产业化项目(2009-96)
关键词
不同介质
界面调节
根系构型
抗氧化酶
土壤特性
different media
interface regulation
root architecture
antioxidant enzymes
soil properties
