生态环境学报
生態環境學報
생태배경학보
ECOLOGY AND ENVIRONMENT
2015年
7期
1118-1124
,共7页
羊草草原%主要植物%元素含量
羊草草原%主要植物%元素含量
양초초원%주요식물%원소함량
Leymus Chinensis grassland%main species%element contents
植物对营养元素的吸收利用是生态系统物质循环的关键过程,同时也是退化草地生态系统恢复和重建的重要问题。为探讨草原生态系统植物对元素的吸收利用规律,在内蒙古锡林河流域的羊草草原选取羊草(Leymus chinensis、冰草(Agropyron cristatum)、大针茅(Stipa grandis)、西伯利亚羽茅(Achnatherum. sibirica)、芯芭(Cymbaria dahurica.)、洽草(Koeleria cristata)等11种主要植物为研究对象,分析比较了10种营养元素的含量特征。结果表明,(1)研究区主要植物各元素含量特征属于w(K)>w(Ca)>w(Mg)型。元素的变异系数均小于1,元素种间差异不显著。(2)相关性分析表明,C和Fe、C和Cu、N和K、N和Mg、P和K、P和Mg、Ca和Mg、Fe和Cu均为极显著相关(P≤0.01),C和Fe、C和Cu是负相关,其它均为正相关;N和P、N和Ca、K和Mg显著正相关(P≤0.05)。(3)禾本科植物具有低N-P-K-Ca特征,Fe、Cu元素含量较高,非禾本科物种Mn、Zn、P、Mg、Ca、K、N、C元素含量较高,其中Ca、K、Mg元素达到极显著差异(P≤0.01),N达到显著差异(P≤0.05)。(4)利用主成分分析法对植物营养元素水平进行综合评价,表明芯芭、洽草、菊叶委陵菜的营养元素含量水平较高,吸收营养元素的能力较强。
植物對營養元素的吸收利用是生態繫統物質循環的關鍵過程,同時也是退化草地生態繫統恢複和重建的重要問題。為探討草原生態繫統植物對元素的吸收利用規律,在內矇古錫林河流域的羊草草原選取羊草(Leymus chinensis、冰草(Agropyron cristatum)、大針茅(Stipa grandis)、西伯利亞羽茅(Achnatherum. sibirica)、芯芭(Cymbaria dahurica.)、洽草(Koeleria cristata)等11種主要植物為研究對象,分析比較瞭10種營養元素的含量特徵。結果錶明,(1)研究區主要植物各元素含量特徵屬于w(K)>w(Ca)>w(Mg)型。元素的變異繫數均小于1,元素種間差異不顯著。(2)相關性分析錶明,C和Fe、C和Cu、N和K、N和Mg、P和K、P和Mg、Ca和Mg、Fe和Cu均為極顯著相關(P≤0.01),C和Fe、C和Cu是負相關,其它均為正相關;N和P、N和Ca、K和Mg顯著正相關(P≤0.05)。(3)禾本科植物具有低N-P-K-Ca特徵,Fe、Cu元素含量較高,非禾本科物種Mn、Zn、P、Mg、Ca、K、N、C元素含量較高,其中Ca、K、Mg元素達到極顯著差異(P≤0.01),N達到顯著差異(P≤0.05)。(4)利用主成分分析法對植物營養元素水平進行綜閤評價,錶明芯芭、洽草、菊葉委陵菜的營養元素含量水平較高,吸收營養元素的能力較彊。
식물대영양원소적흡수이용시생태계통물질순배적관건과정,동시야시퇴화초지생태계통회복화중건적중요문제。위탐토초원생태계통식물대원소적흡수이용규률,재내몽고석림하류역적양초초원선취양초(Leymus chinensis、빙초(Agropyron cristatum)、대침모(Stipa grandis)、서백리아우모(Achnatherum. sibirica)、심파(Cymbaria dahurica.)、흡초(Koeleria cristata)등11충주요식물위연구대상,분석비교료10충영양원소적함량특정。결과표명,(1)연구구주요식물각원소함량특정속우w(K)>w(Ca)>w(Mg)형。원소적변이계수균소우1,원소충간차이불현저。(2)상관성분석표명,C화Fe、C화Cu、N화K、N화Mg、P화K、P화Mg、Ca화Mg、Fe화Cu균위겁현저상관(P≤0.01),C화Fe、C화Cu시부상관,기타균위정상관;N화P、N화Ca、K화Mg현저정상관(P≤0.05)。(3)화본과식물구유저N-P-K-Ca특정,Fe、Cu원소함량교고,비화본과물충Mn、Zn、P、Mg、Ca、K、N、C원소함량교고,기중Ca、K、Mg원소체도겁현저차이(P≤0.01),N체도현저차이(P≤0.05)。(4)이용주성분분석법대식물영양원소수평진행종합평개,표명심파、흡초、국협위릉채적영양원소함량수평교고,흡수영양원소적능력교강。
The absorption and utilization of plant nutrients is the key process of ecosystem material cycle, and it’s also a important issue for the restoration and reconstruction of degraded ecosystem. To explore the absorption and utilization regularities on nutrients in the grassland ecosystem plants, the characteristics of 10 elements in 11 main species such asLeymus Chinensis, Agropyron c ristatum, Stipa grandis, Achnatherum. sibirica, Cymbaria dahurica., Koeleria cristata, etc., collected in the Xilin River Basin, were investigated. The results showed that: (1) The contents of plant elements in the study area belongs to (K) > (Ca) > (Mg) type. The coefficients of variation of elements contents were less than 1, indicated there were no obvious differences among plant elements of different species. (2) Correlation analysis among plant elements indicated N and K, N and Mg, P and K, P and Mg, Ca and Mg, Fe and Cu were of markedly positive correlation (P≤0.01), but C and Fe, C and Cu were of negative correlation; N and P, N and Ca, K and Mg were statistically significant (P≤0.05). (3) Gramineous plants have lower N、P、K、Ca and higher Fe, Cu content, but Mn, Zn, P, Mg, Ca, K, N, C in non-gramineous plants were higher, while Ca, K, Mg were statistically most significant difference (P≤0.01), as well as N (P≤0.05). And (4) we used principal component analysis to evaluate the level of plant nutrients, as a result,Cymbaria dahurica L.,Koeleria cristata andPotentilla tanacetiflolia had higher nutrients content, so they had a better ability to absorb nutrients.