施肥对割草地羊草功能性状和化学计量学的影响  

Effect of fertilization on the functional traits and stoichiometry of Leymus chinensis in cut meadow

作　　者：白玉婷 代景忠 夏江宝[1] 闫瑞瑞[3] 杨红军[1] 吕世杰 卫智军 BAI Yu-ting;DAI Jing-zhong;XIA Jiang-bao;YAN Rui-rui;YANG Hong-jun;LYU Shi-jie;WEI Zhi-jun(Binzhou University, Shandong Key Laboratory of Eco-Environmental Science for Yellow River Delta, Binzhou, Shandong Province 256603, China;College of Agriculture and Forestry Engineering and Planning, Tongren University, Tongren, Guizhou Province, 554300, China;Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China;College of Grassland, Resources and Environment, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010011, China)

机构地区：[1]滨州学院山东省黄河三角洲生态环境重点实验室,山东滨州256603 [2]铜仁学院农林工程与规划学院,贵州铜仁554300 [3]中国农业科学院农业资源与农业区划研究所,北京100081 [4]内蒙古农业大学草原与资源环境学院,内蒙古呼和浩特010018

出　　处：《草地学报》2021年第11期2442-2453,共12页Acta Agrestia Sinica

基　　金：国家公益性行业(农业)科研专项“半干旱牧区天然打草场培育与利用技术研究与示范”项目(2013060);国家重点研发计划项目“呼伦贝尔退化草甸草原综合治理技术与模式”(2016YFC0500603)资助。

摘　　要：本研究以羊草(Leymus chinensis)为研究对象,测定羊草植物功能性状、营养元素和化学计量等多个指标,进行多角度综合系统的研究,阐释羊草割草地羊草种群对不同改良措施的响应特点及变化规律。运用单、双因素方差分析、相关分析和主成分分析方法对相关指标进行统计分析。结果表明:大多数羊草功能性状对施肥处理较为敏感,但随着施肥年份增加,部分指标敏感程度减弱;高浓度(N 10.5 g·m^(-2)+P 5.1 g·m^(-2))施肥处理显著增加了株高和茎长,茎长成为羊草株高增长的主要因素;高浓度(N 10.5 g·m^(-2)+P 5.1 g·m^(-2))施肥处理有利于羊草种群地上生物量的增加;羊草氮含量随着施肥年份增加逐渐增加,羊草氮含量与羊草C∶N存在高度负相关,施肥(N 10.5 g·m^(-2)+P 5.1 g·m^(-2))处理下羊草叶片和茎的C∶N,羊草个体和叶片C∶P最低。Using Leymus chinensis population as research object,the functional traits,nutrient elements,stoichiometry and other indicators of the Leymus chinensis were analysis with multi-angle comprehensive system to explain the responsive characteristics and changing laws of the Leymus chinensis population of different improvement measures on cut grassland in our study.Use single and double factor analysis of variance,correlation analysis and principal component analysis to perform statistical analysis on relevant indicators.The results showed that most of the functional traits of Leymus chinensis were sensitive to fertilizer treatments.As the year of fertilization increased,the sensitivity of some indicators decreased;The high rate(N 10.5 g·m^(-2)+P 5.1 g·m^(-2))of fertilizer treatment significantly increased plant height and stem length,and stem length became the main factor for growth of Leymus chinensis;The high rate of(N 10.5 g·m^(-2)+P 5.1 g·m^(-2))fertilizer treatment was conducive to the increase of the aboveground biomass of Leymus chinensis;the nitrogen content of Leymus chinensis gradually increased with the increase of fertilization year.There was a negative correlation between the nitrogen content of Leymus chinensis and the C:N of Leymus chinensis.The C:N of leaves and stems of Leymus chinensis and C:P of Leymus chinensis individuals and leaves were the lowest under the high rate of(N 10.5 g·m^(-2)+P 5.1 g·m^(-2))fertilizer treatment.

关 键 词：割草地 施肥 功能性状 化学计量学 

分 类 号：S147.22[农业科学—肥料学]