| 摘要: |
| 为确定河套灌区永良四号小麦耐盐指标,本研究根据两年大田定位试验观测,建立该灌区小麦产量、生物量、株高、叶片K+与土壤耕层盐分含量S型耐盐函数,同时分析小麦产量随40 cm耕层土壤盐分含量的变化特征。结果表明,小麦生物量与0~20 cm土层含盐量的耐盐函数拟合性最好,决定系数最大,可作为河套灌区小麦耐盐性评价的关键指标;当0~20 cm土层土壤含盐量达到2.926g/kg时,小麦产量开始急剧下降。研究结果将为进一步研究小麦耐盐性提供参考,对当地小麦生产具有重要指导意义。 |
| 关键词: 河套灌区 小麦产量 土壤含盐量 耐盐指标 耐盐函数 |
| DOI：10.11841/j.issn.1007-4333.2013.06.007 |
| 投稿时间：2013-04-17 |
| 基金项目:国家公益性行业(农业)科研专项(200903001-2-3);国家大学生创新创业训练计划(201210019012) |
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| Screening and evaluation of salinity tolerance indexfor wheat in Hetao Irrigation District |
|
TI Jin-song, TONG Wen-jie, WANG Yu-hao, ZHOU Yuan-yuan, WEN Xin-yan, CHEN Fu
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| (College of Agronomy and Biotechnology/Key Laboratory of Farming System of Ministry of Agriculture, China Agricultural University, Beijing 100193, China) |
| Abstract: |
| In order to determine the soil salinity tolerance index for wheat cultivar Yongliang 4 in Hetao Irrigation District,the S-shaped salinity tolerance function about wheat yield,biomass,height,potassium(K+) concentration in leafs and soil salt content was established,based on two years on-field experiment.Besides,the change characteristics of wheat yield in response to the salt content at 40 cm below soil surface were analyzed.The results indicated that the biomass and the salt content at 0-20 cm were best fitted with S-shaped salinity tolerance function with the largest determination coefficient.Therefore,the biomass and the salt content at 0-20 cm were determined to be the key parameters for evaluating wheat salinity tolerance in Hertao Irrigation District.Wheat yield declined remarkably when the soil salinity in soil layer 0-20 cm reached 2.926 g/kg.This study will provide reference for further research on wheat salinity tolerance,and also offer significant guidance for local wheat production. |
| Key words: Hetao Irrigation District wheat yield soil salt content salinity tolerance index salinity tolerance function |
