不同林龄枣林土壤水分分布模型  

Numerical Distribution Characteristic of Soil Water of Different Aged Jujube Plantations

作　　者：王经民[1] 王灿[2] 赵斌[1] 汪有科[3,4] 

机构地区：[1]西北农林科技大学理学院,陕西杨陵712100 [2]杨凌职业技术学院,陕西杨陵712100 [3]西北农林科技大学水土保持研究所,陕西杨陵712100 [4]中国科学院水利部水土保持研究所,陕西杨陵712100

出　　处：《西北林学院学报》2016年第2期55-59,共5页Journal of Northwest Forestry University

基　　金：国家自然科学基金(31200343);国家支撑课题"陕西水蚀区植被功能调控技术与示范"(2015BAG01B03);西北农林科技大学专项(YZKC1323;JY1302100);西北农林科技大学博士科研启动基金项目(Z109021119);中央高校基本科研业务费专项资金项目(2014YB030)

摘　　要：为明确黄土丘陵区枣林土壤水分随树龄增长而变化的空间分布特征及定量模型表达,分别获得1年生、3年生、5年生及12年生枣林地0~10m的土壤水分数据。结果表明,1~12年生枣林生长过程消耗土壤水分深度基本在0.04~7m,用Gauss函数与扩张因子b的积分别定量描述枣林1年生、3年生、5年生及12年生枣林地土层0.04~10m土壤耗水曲线模型,扩张因子随树龄增长而扩大,具有二次相关性,反映了枣林随林龄增长土壤水分消耗变大的变化规律.其误差可控在理想范围。In order to define the space distribution features and quantitative models representing the changes of soil water of jujube plantations with ages in loess hilly region,data of soil water in the depth of 0-10 m were collected and statistically analyzed from jujube plantations with the ages of 3-,5-,and 12-year-old,respectively.The results demonstrated that water consumption mainly occurred in the soils with the depths of 0.04 to 7mfor 1-to 12-year-old jujube trees.Gauss function and the expansion factor b could quantitatively describe the soil water consumption.The expansion factor enlarged with the growth age featured by secondary correlationship.The model reflected the regularities of soil water consumption,in which the errors were satisfactorily controllable.

关 键 词：土壤水分 枣林 黄土丘陵区 数学模型 

分 类 号：S665.1[农业科学—果树学] S152.7[农业科学—园艺学]