广西植物2024，Vol.44Issue(8)：1438-1447,10.DOI:10.11931/guihaia.gxzw202312039
氮磷添加对滨海新围垦区大叶女贞细根形态特征和生物量的影响
Effects of nitrogen and phosphorus addition on fine root morphological characteristics and biomass of Ligustrum lucidum in coastal new reclamation area
摘要
Abstract
To explore the effects of nitrogen(N)and phosphorus(P)nutrient gradients on morphological characteristics and biomass of fine root(≤2 mm)of plant surface layer(0-10 cm)in new coastal reclamation areas,Ligustrum lucidum was used as the test material and the fertilization method of ingrown soil cores(volume 196.25 cm3)was used to conduct nitrogen and phosphorus addition experiments on the soil core of the soil surface layer(0-10 cm)of L.lucidum.Suppose the fertilization gradient was 0,1,3,5,7,9,11,13,15,17,20 g per hole.The effects of N and P nutrients on the functional traits of fine roots in the soil surface were studied.The results were as follows:(1)Compared with the control,when 3 g N was applied,the length,surface area,volume,root length density,root surface area density,and biomass of fine roots increased significantly,with the increases of 62.39%,120.87%,169.97%,59.19%,106.99%and 102.75%,respectively;when 5-11 g N was applied,the above indicators gradually decreased.When the amount of N was applied greater than 11 g,no root grew.(2)When 3 g P was applied,the total length,surface area,volume,root length density,root surface area density and biomass of the root system significantly increased,with the increases of 77.37%,111.15%,147.50%,73.87%,97.88%and 98.05%.When the amount of P was applied greater than 5 g,the above indicators of fine roots gradually decreased,but there was no rootless situation.Fertilization caused significant changes in the morphological indicators and biomass of fine roots,and plants improved the ability to acquire soil nutrients by changing the structure of fine roots.Therefore,applying 3 g of N or P respectively to the surface soil 1 m away from the trunk significantly can promote the growth of fine roots of L.lucidum.关键词
氮磷添加/细根形态/生物量/大叶女贞/新围垦区/上海Key words
nitrogen and phosphorus addition/fine root morphology/biomass/Ligustrum lucidum/new reclamation area/Shanghai分类
农业科技引用本文复制引用
王志保,路兴慧,张演义,王宏骄,谢宪,江洪,韩婧雅,王艺合,梁晶..氮磷添加对滨海新围垦区大叶女贞细根形态特征和生物量的影响[J].广西植物,2024,44(8):1438-1447,10.基金项目
国家自然科学基金(31901210) （31901210）
国家和山东省大学生创新创业训练计划项目(202210447024,S202210447040) （202210447024,S202210447040）
聊城大学创新创业训练计划项目(cxcy260,cxcy264,cxcy276,cxcy284,cxcy309) （cxcy260,cxcy264,cxcy276,cxcy284,cxcy309）
聊城大学风景园林学科建设基金(319462212) （319462212）
聊城大学博士科研启动项目(318052123). （318052123）
