阿克苏河灌区棉花耐盐指标的确定

被引:19
作者
张豫 [1 ,2 ]
王立洪 [2 ]
孙三民 [2 ]
陈秀龙 [3 ]
梁玉纪 [4 ]
胡顺军 [3 ]
机构
[1] 广州城建职业学院
[2] 塔里木大学水利与建筑工程学院
[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
[4] 长庆油田分公司第一采油厂
关键词
棉花; 盐分生产函数; 耐盐指标; 土壤含盐量;
D O I
暂无
中图分类号
S562 [棉];
学科分类号
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%。
引用
收藏
页码:2051 / 2059
页数:9
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