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[1]文春燕 朱嘉磊 薄慧娟 宋莲君 聂立水**.不同水氮处理下毛白杨碳氮磷化学计量特征*[J].应用与环境生物学报,2019,25(03):1-11.[doi:10.19675/j.cnki.1006-687x.2018.09012]
 WEN Chunyan,ZHU Jialei,BO Huijuan,et al.Effects of irrigation and nitrogen application on carbon, nitrogen and phosphorus stoichiometry of Populus tomentosa*[J].Chinese Journal of Applied & Environmental Biology,2019,25(03):1-11.[doi:10.19675/j.cnki.1006-687x.2018.09012]
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不同水氮处理下毛白杨碳氮磷化学计量特征*()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
25卷
期数:
2019年03期
页码:
1-11
栏目:
研究论文
出版日期:
2019-06-25

文章信息/Info

Title:
Effects of irrigation and nitrogen application on carbon, nitrogen and phosphorus stoichiometry of Populus tomentosa*
文章编号:
201809012
作者:
文春燕1 朱嘉磊1 薄慧娟1 宋莲君2 聂立水1**
1北京林业大学林学院 北京 1000832河北省威县苗圃场 邢台 054700
Author(s):
WEN Chunyan1 ZHU Jialei1 BO Huijuan1 SONG Lianjun2 & NIE Lishui1**
?1 College of Forestry, Beijing Forestry University, Beijing 100083 , China; 2 Nursery of Weixian County , Xingtai 054700 , China
关键词:
水氮交互毛白杨化学计量学
Keywords:
water-nitrogen interaction Populus tomentosa C N P stoichiometry
DOI:
10.19675/j.cnki.1006-687x.2018.09012
摘要:
为研究灌水和施氮对毛白杨(Populus tomentosa Carrière )优良无性系休眠期各器官碳氮磷化学计量特征的影响,利用毛白杨速生丰产林10年连续灌水和施氮双因素试验(通过灌水分别维持土壤含水量至田间持水量的45%、60%、75%;施氮量为0、101.6、203.2、304.8 kg·hm-2,共计12个处理,每个处理3次重复)林地,选择其中的优良无性系S86为研究对象,2016年10月末待树木生长停止进入休眠期时,在每个水氮处理小区选取1株标准木并对其进行伐倒肢解处理后,测定分析毛白杨根、干、枝中的C、N、P含量。结果显示:(1)毛白杨树干和枝C、P含量显著高于根(p<0.05);N含量在各器官间差异显著,大小为枝>根>干。C:N在各器官间差异显著,大小为干>根>枝;C:P在各器官间差异不显著;N:P在各器官间差异显著,大小为枝>根>干。(2)灌水对各器官C含量无显著影响,施氮显著降低根C含量;灌水、施氮以及两者交互作用均显著影响根、干、枝N含量,灌水和施氮显著增加各器官N含量,并在高水高氮条件下毛白杨各器官N含量显著增大。(3)灌水和施氮显著降低了毛白杨各器官C:N,对C:P影响不显著,显著增加N:P含量。本研究表明,灌水和施氮均促进毛白杨各器官对N的吸收,从而提高各器官N含量;灌水和施氮降低各器官C:N,促进毛白杨生长;尽管此区为毛白杨适生区,但毛白杨速生丰产林仍受N素限制,灌水和施氮是提高毛白杨速生丰产林生长量的重要栽培措施。(图2 表6 参41)
Abstract:
This study aimed to explore the effects of irrigation and nitrogen application on the stoichiometric characteristics of C, N and P in various organs of Populus tomentosa Carrière during dormancy. The fast-growing high-yield P. tomentosa clonal S86 plantation with 10-year continuous irrigation and nitrogen application rate was selected. The soil water content was adjusted to 45%, 60%, 75% of field capacity by irrigation and the nitrogen application was 0, 101.6, 203.2, 304.8 kg·hm -2, and in total there were 12 treatments with 3 replicates. At the end of October 2016, when the tree growth entered the dormant period, a sample tree was selected from each plot and fell down to sample roots, stems and branches for the determination of C, N and P content. (1) The content of C and P in the stems and branches of P. tomentosa was significantly higher than that of roots ( p<0.05); The content of N was significantly different among organs and showed in the order of branch > root > stem. The C:N was significantly different among organs and stem > root > branch; The C:P was not significantly different among organs; The N:P was significantly different among organs and branch > root > stem. (2) Irrigation had no significant effect on C content in all organs. Nitrogen application significantly reduced root C content; Irrigation, nitrogen application and the ir interaction significantly affected the N content of root, stem and branch. Irrigation and nitrogen application significantly increased the N content of various organs, and the N content of various organs of P. tomentosa increased significantly under high water content and high nitrogen application rate. (3) Irrigation and nitrogen application significantly reduced C:N in various organs of P. tomentosa, which had no significant effect on C:P and significantly increased N:P content. Irrigation and nitrogen application promote N uptake , thereby increasing the N content of all organs; Irrigation and nitrogen application reduce C :N ratio and increase the growth rate of P. tomentosa; although this area is suitable for P. tomentosa, fast-growing and high-yield timber plantation may still be restricted by N. Irrigation and nitrogen application are two important cultivation measures to improve the timber yield of P. tomentosa pla ntation.? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?

备注/Memo

备注/Memo:
收稿日期: 2018-09-07 接受日期 Accepted: 2018-10-25 *“十二五”国家科技支撑计划资助(2015BAD09B02) 资助 **通讯作者(E-mail:nielishui@sohu.com)点击摘要页题目后的“PDF”可下载阅读全文;本文为已录用的作者修定稿,尚未经编辑全面修改。引用本文请注明出处本刊;发表刊期和页码将以正式出版时的安排为准,但DOI确定不变。
更新日期/Last Update: 2018-11-19