A Comparative Study on Relationship between Saline Properties of Soil and Productivity of Leymus chinensis in Different Precipitation Gradient of Songnen Grassland

doi:10.11733/j.issn.1007-0435.2016.03.016

Acta Agrestia Sinica ›› 2016, Vol. 24 ›› Issue (3): 590-597.DOI: 10.11733/j.issn.1007-0435.2016.03.016

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A Comparative Study on Relationship between Saline Properties of Soil and Productivity of Leymus chinensis in Different Precipitation Gradient of Songnen Grassland

ZHANG Zhong-hua^1,2, WANG Hua³, TANG Zhong-hua¹, NIE Si-ming¹, ZHAO Long¹, ZHAO Dong-mei¹, LIANG Zheng-wei²

1. The Key Laboratory of Plant Ecology, Northeast Forestry University, Harbin, Heilongjiang Province 150040, China;
2. Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, Jilin Province 130012, China;
3. Institute of Natural Resources and Ecology, Heilongjiang Academy of Sciences, Harbin, Heilongjiang Province 150040, China

Received:2015-05-06 Revised:2016-03-06 Online:2016-06-15 Published:2016-09-18

松嫩草地不同降水区土壤盐碱化程度与羊草生产力关系的比较研究

张衷华^1,2, 王化³, 唐中华¹, 聂思铭¹, 赵龙¹, 赵冬梅¹, 梁正伟²

1. 森林植物生态学教育部重点实验室东北林业大学, 黑龙江哈尔滨 150040;
2. 中国科学院东北地理与农业生态研究所, 吉林长春 130102;
3. 黑龙江省科学院自然与生态研究所, 黑龙江哈尔滨 150040

通讯作者: 梁正伟
作者简介:张衷华(1979-),男,吉林通化市人,博士,主要从事植物抗逆生理生态学研究及盐碱地改良和植被重建,E-mail:en_cn@126.com
基金资助:
国家自然科学基金（41271522）；中央高校基本科研业务费专项资金（2572015CA05）资助

Abstract

Abstract:

Productivity of Songnen grassland is affected by precipitation and soil salinization, but the correlation between soil salinization and grassland productivity is still not clear in the context of precipitation change. Based on the distribution characteristics of rainfall belt and field investigation data in Songnen grassland, the correlation of soil salinization and biomass of Leymus chinensis in different precipitation area were analyzed. Analysis of each investigation area of soil pH value, conductivity and bulk density by systematic cluster analysis method, salt stress degree was divided into three groups:low, middle and high, respectively. And the change of soil salinization indicator in different precipitation areas on the aboveground biomass of Leymus chinensis was discussed. The results showed that in different precipitation areas, there was different correlation between productivity of Leymus chinensis and soil salinization indicator. The aboveground biomass of Leymus chinensis was significantly negatively correlated with soil bulk density in the higher precipitation of the eastern and the lower precipitation of the southwest, and the aboveground biomass was significantly negatively correlated with soil pH value in moderate precipitation of the midwest. In general, there was an exponential decay of the biomass of Leymus chinensis with the increase of saline and alkaline stress, but the main factor and impacting degree of recession at the precipitation zones were different.

Key words: Biomass, Saline and alkaline stress, Leymus chinensis, System cluster analysis, Songnen grassland

摘要：

松嫩草地生产力同时受到降水和土壤盐碱化的制约，但是在降水变化的背景下土壤盐碱化与草地生产力的相关性仍不清楚。本文基于松嫩草地降水的带状分布特征和野外样地调查数据，分析了不同降水量地区土壤盐碱化与羊草生物量的相关性，并利用系统聚类分析法对每个调查区土壤pH值、电导率和容重进行聚类，划分出盐碱胁迫低、中和高3个类群，探讨不同降水区土壤盐碱化指标对羊草地上生物量影响的变化趋势。结果表明：不同降水区，羊草生产力与土壤盐碱化指标间相关性不同。降水较高的草地东部和降水较少的西南部羊草地上生物量和土壤容重呈显著负相关，降水适中的草地中西部羊草地上生物量和土壤pH值呈显著负相关，羊草生物量总体随着盐碱胁迫呈负指数衰退，但各降水带内衰退主要因子和衰退影响程度有所不同。

关键词: 生物量, 盐碱胁迫, 羊草, 聚类分析, 松嫩草地

CLC Number:

Q142.3

ZHANG Zhong-hua, WANG Hua, TANG Zhong-hua, NIE Si-ming, ZHAO Long, ZHAO Dong-mei, LIANG Zheng-wei. A Comparative Study on Relationship between Saline Properties of Soil and Productivity of Leymus chinensis in Different Precipitation Gradient of Songnen Grassland[J]. Acta Agrestia Sinica, 2016, 24(3): 590-597.

张衷华, 王化, 唐中华, 聂思铭, 赵龙, 赵冬梅, 梁正伟. 松嫩草地不同降水区土壤盐碱化程度与羊草生产力关系的比较研究[J]. 草地学报, 2016, 24(3): 590-597.

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A Comparative Study on Relationship between Saline Properties of Soil and Productivity of Leymus chinensis in Different Precipitation Gradient of Songnen Grassland

松嫩草地不同降水区土壤盐碱化程度与羊草生产力关系的比较研究

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