Summer Salinization Characteristics of Irrigated Corn Cropland During Oasisization of Desert Steppe

YANG Xin-guo; SONG Nai-ping; LIU Bing-ru; AN Hui

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Summer Salinization Characteristics of Irrigated Corn Cropland During Oasisization of Desert Steppe

更新时间：2024-11-07

- Summer Salinization Characteristics of Irrigated Corn Cropland During Oasisization of Desert Steppe
- Vol. 25, Issue 4, (2011)
- 作者机构：
  
  1. 西北土地退化与生态恢复国家重点实验室培育基地
  2. 西北退化生态系统恢复与重建教育部重点实验室(宁夏大学)
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2011
- 稿件说明：
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YANG Xin-guo, SONG Nai-ping, LIU Bing-ru, et al. Summer Salinization Characteristics of Irrigated Corn Cropland During Oasisization of Desert Steppe[J]. 2011, 25(4).
DOI：

YANG Xin-guo, SONG Nai-ping, LIU Bing-ru, et al. Summer Salinization Characteristics of Irrigated Corn Cropland During Oasisization of Desert Steppe[J]. 2011, 25(4). DOI：

摘要

在地处宁夏中部荒漠草原区的红寺堡扬黄灌区

选取不同利用年限的灌溉玉米地

以临近的未利用地为对照

对其夏季含盐量及盐离子组分变化规律、剖面分布类型、时空相关性及其碱化特征进行了系统分析。结果表明

在退化草地转化成灌溉农田的过程中

土壤夏季含盐量剖面分布变化依次为表聚型、均匀型(震荡型)和底聚型。未利用地0-60 cm土层总含盐量6.0‰

耕种8年后只有2.25‰

表层(0-20cm)的总盐含量降幅高达80.2%。未利用地盐分表聚特征主要由氯离子、镁离子、钙离子和钾离子决定

其浓度随利用年限的变化表现较为平稳

剖面分布以均匀型为主

而硫酸根离子和钠离子底聚特征明显。相对未利用地

重碳酸根离子是唯一全剖面出现明显增加的离子类型。离子间显著相关关系多集中于0-40 cm土层发生

相关格局随利用年限发生明显变化

8年玉米地重碳酸根离子和钠离子正相关、钙离子与钠离子以及重碳酸根离子间负相关关系凸显。土壤碱化表现出明显的阶段性发生(2年玉米地)和下迁富集发生(40-80 cm)特征

8年玉米地含盐量和碱化度同步显著下降

土壤盐渍化整体逆转。灌溉玉米地土壤含盐量与碱化度显著正相关

未利用地含盐量与碱化度则呈现两极化分布趋势。...

Abstract

The soil of irrigated corn croplands with different farming years

in Hongsibu yang-huang irrigation area in Ningxia central profiles(degenerated desert steppe)

were sampled and tested to analysis their evolution

profiles distribution

space-time correlation for the salt contents and salt ions and the basification characters in summer.During the oasisization of desert steppe

the profiles distribution of soil salt contents changed from surface-gathering

to uniformity or vibration

at last to bottom-gathering on...

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