中国农业科学 ›› 2011, Vol. 44 ›› Issue (10): 2051-2059.doi: 10.3864/j.issn.0578-1752.2011.10.010

• 土壤肥料·节水灌溉·农业生态环境 • 上一篇    下一篇

阿克苏河灌区棉花耐盐指标的确定

 张豫, 王立洪, 孙三民, 陈秀龙, 梁玉纪, 胡顺军   

  1. 1.广州城建职业学院,广州 510925
    2.塔里木大学水利与建筑工程学院,新疆阿拉尔 843300
    3.中国科学院新疆生态与地理研究所荒漠与绿洲生态国家重点实验室,乌鲁木齐 830011
    4.长庆油田分公司第一采油厂,陕西延安727307
  • 收稿日期:2009-12-09 出版日期:2011-05-15 发布日期:2010-01-14
  • 通讯作者: 通信作者胡顺军,Tel:0991-7885431;E-mail:xjhushunjun@yahoo.com.cn
  • 作者简介:张 豫,E-mail:nange_green@yeah.net
  • 基金资助:

    新疆维吾尔自治区科技攻关重大专项(20073117-3)、中国科学院“西部之光”人才计划“联合学者”项目、国家自然科学基金项目(40471020)、科技部技术人员服务企业项目(2009GJG41048)、兵团工业科技攻关项目(2009GG32)

Indexes of Salt Tolerance of Cotton in Akesu River Irrigation District

 ZHANG  Yu, WANG  Li-Hong, SUN  San-Min, CHEN  Xiu-Long, LIANG  Yu-Ji, HU  Shun-Jun   

  1. 1.广州城建职业学院,广州 510925
    2.塔里木大学水利与建筑工程学院,新疆阿拉尔 843300
    3.中国科学院新疆生态与地理研究所荒漠与绿洲生态国家重点实验室,乌鲁木齐 830011
    4.长庆油田分公司第一采油厂,陕西延安727307
  • Received:2009-12-09 Online:2011-05-15 Published:2010-01-14

摘要: 【目的】通过建立阿克苏河灌区棉花产量与其相应的土壤含盐量的响应关系,即棉花盐分生产函数模型:分段式线性函数模型和非线性-S型函数模型,确定该地区棉花的耐盐指标。【方法】根据3年4地大田定位观测的棉花产量和土壤盐分数据,通过线性回归分析法和非线性最小二乘法分别得出0—20 cm和0—40 cm土层的2种模型,对比分析函数模型的适用性,依据适用性更强的土层模型计算棉花的耐盐指标。【结果】分别拟合出0—20 cm和0—40 cm土层的分段线性函数模型和非线性-S型函数模型,其中非线性-S型盐分生产函数模型拟合精度较高。【结论】阿克苏河灌区(0—20 cm土层)棉花的耐盐临界值、耐盐极限值、减产速率最大时的土壤盐分含量、减产50%时的土壤盐分含量分别为0.302%、1.119%、0.558%、0.581%。

关键词: 棉花, 盐分生产函数, 耐盐指标, 土壤含盐量

Abstract: 【Objective】This experiment is to construct the linear subsected functions and the nonlinear S-shaped functions between the cotton relative yield and soil salt content in the salinized soil in Akesu River Irrigation District and to determine the index of cotton salt tolerance.【Method】The linear regression and the nonlinear least square approximation were used to deduce two yield response functions of cotton to soil salt content, which are respectively for the 0-20 cm soil layer and the 0-40 cm soil layer, based on experimental data from the four observation points during the three years, whose applicability were analyzed and compared and then the indexes of cotton salt tolerance were drawn up with the function with better applicability. 【Result】 Both the linear subsected functions and the nonlinear S-shaped functions were founded for the 0-20 cm soil layer and the 0-40 cm soil layer. It was found that the nonlinear S-shaped function fitted better with the response relationship between the cotton relative yield and the soil salt content in the salinized soil in Akesu River Irrigation District than others.【Conclusion】The cotton critical soil salt content the cotton threshold soil salt content, the soil salt content at the fastest rate of cotton relative yield reduction, and the soil salt content at the 50% cotton relative yield reduction are respectively 0.302%, 1.119%, 0.558%, 0.581% (0-20 cm soil layer) in Akesu River Irrigation District.

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