山东农业科学2024，Vol.56Issue(5)：87-95,9.DOI:10.14083/j.issn.1001-4942.2024.05.011
水肥耦合对'聊红'椿幼苗根系形态特征的影响
Effects of Water and Fertilizer Coupling on Root Morphological Characteristics of Ailanthus altissima'Liaohong'Seedlings
摘要
Abstract
In order to explore the response characteristics of root growth of Ailanthus altissima'Liao-hong'seedlings to the coupling of water and fertilizer,and determine the best combination of irrigation and fertilization,one-year-old A.altissima'Liaohong'seedlings were used as the object and two-factor design was conducted in this experiment.Three water treatments were set as low water(W1:30%～40%of field water holding capacity),reclaimed water(W2:50%～60%of field water holding capacity)and high water(W3:70%～80%of field water holding capacity),and four fertilizer levels were set as no fertilizer(F0:no applica-tion of N,P2 O5,K2 O),low fertilizer(F1:2.0,1.0,1.5 g·plant-1 of N,P2 O5,K2 O respectively),medium fertilizer(F2:4.0,2.0,3.0 g·plant-1 of N,P2 O5,K2 O respectively);and high fertilizer(F3:6.0,3.0,4.5 g·plant-1 of N,P2 O5,K2 O respectively),which formed 12 treatments.The effects of different water and fer-tilizer coupling treatments on root traits(root length,root surface area,root volume,average root diameter,specific root length and specific surface area)of A.altissima'Liaohong'seedlings were compared by pot ex-periment.The results showed that both water and fertilization treatments had significant effects on each trait of coarse roots and all the traits of fine roots except for the specific surface area.The interaction of water and ferti-lization had significant effects on the surface area and volume of coarse roots and the length,surface area,vol-ume and specific root length of fine roots.Under F0 and F1 treatments,the length,volume and average diame-ter of both coarse and fine roots increased with the increase of irrigation amount,but they increased first and then decreased under F2 and F3 treatments,indicating more obviously promotion effects of F0W3 and F2W2 on root growth.Above all,high fertilizer inhibited the growth of roots,and fine roots had stronger tolerance than coarse roots.The coupling of water and fertilizer had more significant effects on fine roots.The combina-tion of F2W2 was most beneficial to root growth of A.altissima'Liaohong'seedlings.关键词
'聊红'椿幼苗/水肥耦合/根系形态特征/绿化树种Key words
Ailanthus altissima'Liaohong'seedlings/Water and fertilizer coupling/Root morphological traits/Greening tree species分类
农业科技引用本文复制引用
王沛然,张家林,高祥斌,涂佳才..水肥耦合对'聊红'椿幼苗根系形态特征的影响[J].山东农业科学,2024,56(5):87-95,9.基金项目
山东省重点研发计划项目(2019GNC21410) （2019GNC21410）
聊城大学科研项目(318011903) （318011903）
聊城大学大学生创新创业训练计划项目(CXCY2022425) （CXCY2022425）
聊城大学风景园林学科建设基金项目(319462212) （319462212）
