黄土丘陵区草地植被群落优势种叶片 功能性状对氮磷添加的响应 | |
杨全1,2; 陈志飞3; 周俊杰3; 赖帅彬3; 简春霞3; 王智1,3; 徐炳成1,3 | |
2019 | |
发表期刊 | 应 用 生 态 学 报 |
卷号 | 30期号:11页码:3697-3706 |
摘要 | 以黄土丘陵区草地植被群落 3 种优势种白羊草、长芒草和达乌里胡枝子为对象,采
用裂区试验设计,设置 0、
50 和 100 kg N·hm-2·a-1 3 个氮处理和 0、
40 和 80 kg P2O5·hm-2·
a-1 3 个磷处理,于生长旺盛期测定了各植物的叶长、叶宽、比叶面积、叶片干物质含量、叶片
氮、磷含量和氮磷比等指标,分析不同优势种叶片功能性状对氮磷添加的响应差异.结果表
明: 与未施肥相比,
50 和 100 kg N·hm-2·a-1 处理下白羊草叶长和叶宽分别显著增加 35.3%
和 64.4%,而长芒草仅有叶长显著增加 58.8%,达乌里胡枝子仅有叶宽显著增加 33.9%,但三
者叶片干物质含量分别显著降低 10.7%、
15.3%和 11.2%,白羊草和长芒草叶片氮含量分别显
著增加 23.0%和 99.2%,氮磷比分别显著增加 45.8%和 96.9%; 40 和 80 kg P2O5·hm-2·a-1处
理下达乌里胡枝子叶长、叶宽和比叶面积分别显著增加 56.9%、
41.4%和 19.6%,叶片干物质
含量显著下降 14.9%,三者叶片磷含量分别显著增加 96.7%、
110.9%和 238.4%,氮磷比分别显
著降低 45.8%、
42.8%和 53.7%.50 kg N·hm-2·a-1 处理下,与未施磷相比,
40 和 80 kg P2O5·
hm-2·a-1 处理后仅达乌里胡枝子叶长和叶宽显著增大,
3 种植物叶片磷含量显著增加,白羊
草和长芒草叶片氮含量显著降低; 100 kg N·hm-2·a-1 处理下,施磷后白羊草和长芒草叶长、
达乌里胡枝子叶宽显著增大,三者叶片磷含量显著增加,白羊草叶片氮含量显著降低.综上表
明,
3 个优势种植物叶片功能性状对短期氮磷添加的响应存在明显差异,这些差异与物种属性
和施肥水平有关,不同优势种对氮磷添加响应的差异对维持草地群落多样性和稳定性具有重
要作用. |
其他摘要 | To analyze plant functional traits of dominant species to nitrogen and phosphorus addi-
tion,three species ( Bothriochloa ischaemum,Stipa bungeana,and Lespedeza davurica ) were
selected in the loess hilly-gully region. A split-plot experiment which included three N treatments
( 0,50,and 100 kg N·hm-2·a-1 ) and three P treatments ( 0,40,and 80 kg P2O5·hm-2·
a-1 ) was conducted. At the fast-growing stage,leaf length,leaf width,specific leaf area,leaf dry
matter content,leaf N content,leaf P content,and leaf N: P were measured. Results showed that
under 50 and 100 kg N·hm-2·a-1 treatments,leaf length and width of B. ischaemum increased
significantly by 35.3% and 64.4%,respectively,while only the leaf length of S. bungeana and the
leaf width of L. davurica increased significantly by 58.8% and 33.9%,respectively. Leaf dry matter
content of the three species decreased significantly by 10. 7%,15. 3% and 11. 2%,respectively.
Leaf N content and N: P of B. ischaemum and S. bungeana increased significantly by 23.0% and
99.2%,45.8% and 96.9%,respectively,compared with unfertilized treatments. Under 40 and 80
kg P2 O5 ·hm-2 ·a-1
treatments,leaf length,leaf width and specific leaf area of L. davurica
increased significantly by 56.9%,41.4% and 19.6%,respectively,while leaf dry matter content
decreased significantly by 14.9%. Leaf P content of three species increased significantly by 96.7%,
110.9% and 238. 4%,while the N: P decreased significantly by 45. 8%,42. 8% and 53. 7%,
respectively,compared with those under unfertilized. Under 50 kg N·hm-2·a-1 treatment,com-
pared with no P application,leaf length and leaf width of L. davurica and leaf P content of the three
species significantly increased,and leaf N content of B. ischaemum and S. bungeana decreased sig-
nificantly at 40 and 80 kg P2O5·hm-2·a-1 treatments. Under 100 kg N·hm-2·a-1 treatment,
leaf length of B. ischaemum and S. bungeana,leaf width of L. davurica and leaf P content of three
species significantly increased,while leaf N content of B. ischaemum decreased significantly after P
application. In summary,functional traits of dominant species showed significant responses to short-
term nitrogen and phosphorus addition,with the different responses were mainly related to species
traits and fertilization levels. Such difference reflected plant adaptation to habitat changes. The
divergent responses of different species to nitrogen and phosphorus addition played an important role
in maintaining diversity and stability of grassland communities.
|
关键词 | 功能性状 氮磷添加 养分限制 适应性 |
收录类别 | 中文核心期刊要目总览 |
语种 | 中文 |
文献类型 | 期刊论文 |
条目标识符 | sbir.nwafu.edu.cn/handle/361005/9251 |
专题 | 水保所知识产出(1956---) |
作者单位 | 1.中国科学院水利部水土保持研究所,黄土高原土壤侵蚀与旱地农业国家重点实验室 2.中国科学院大学 3.西北农林科技大学水土保持研究所 |
第一作者单位 | 中国科学院水利部水土保持研究所 |
推荐引用方式 GB/T 7714 | 杨全,陈志飞,周俊杰,等. 黄土丘陵区草地植被群落优势种叶片 功能性状对氮磷添加的响应[J]. 应 用 生 态 学 报,2019,30(11):3697-3706. |
APA | 杨全.,陈志飞.,周俊杰.,赖帅彬.,简春霞.,...&徐炳成.(2019).黄土丘陵区草地植被群落优势种叶片 功能性状对氮磷添加的响应.应 用 生 态 学 报,30(11),3697-3706. |
MLA | 杨全,et al."黄土丘陵区草地植被群落优势种叶片 功能性状对氮磷添加的响应".应 用 生 态 学 报 30.11(2019):3697-3706. |
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